Dr. Orlin D. Velev received M.Sc. and Ph.D. degrees from the University of Sofia, Bulgaria, while also spending one year as a researcher in Nagayama Protein Array Project in Japan. After graduating in 1996, Velev accepted a postdoctoral position with the Department of Chemical Engineering, University of Delaware. He initiated an innovative program in colloidal assembly and nanomaterials and was promoted to research faculty in 1998. In 2001 formed his new research group in the Department of Chemical and Biomolecular Engineering, North Carolina State University, where he was promoted to an Associate Professor with tenure in 2006, to full professor in 2008, to chaired professor in 2009 and to distinguished professor in 2018. He has contributed more than 240 publications, which have been cited more than 37,000 times, and has presented more than 310 invited presentations at major conferences and at universities and companies. His awards include among others NSF Career, Langmuir Lecturer, AIChE Acrivos Professional Progress, Camille Dreyfus Teacher-Scholar, Sigma Xi, NC State Alcoa Distinguished Engineering Research, NC State Alumni Distinguished Undergraduate Professor, NC State Innovator of the Year, Springer Colloid and Polymer Science Lecture Award. Velev has been elected to an ACS Fellow and MRS Fellow. He has served as member of the Editorial Advisory Boards of Langmuir, Chem. Mater., Biomicrofluidics and Particle and as Section Editor of Curr. Opin. Colloid Interface Sci. Velev has established a record of innovative research in the area of colloids and nanostructures with electrical and photonic functionality, biosensors, microfluidics and nanomanufacturing. He has been the first to synthesize "inverse opals", one of the most widely studied types of photonic materials today. Velev has also pioneered techniques for making novel nanoparticle materials, Janus particles, rod-like particles, and responsive foams. Technologies based on his research have formed the basis of two Research Triangle Area startup companies. He has been an advocate of incorporating the latest achievements in the areas of nanoscience and nanotechnology in the engineering curriculum.

Works (278)

Updated: December 16th, 2024 15:50

2024 journal article

A primordial DNA store and compute engine

Nature Nanotechnology, 8.

By: K. Lin n, K. Volkel n, C. Cao n, P. Hook*, R. Polak n, A. Clark n, A. San Miguel n, W. Timp* ...

Sources: Web Of Science, NC State University Libraries, Crossref, ORCID
Added: August 25, 2024

2024 journal article

Active microparticle propulsion pervasively powered by asymmetric AC field electrophoresis

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 676, 817–825.

By: N. Diwakar n, G. Yossifon*, T. Miloh* & O. Velev n

author keywords: Active colloids; Active matter; Concentration polarization; AC electrokinetics; AC electrophoresis
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 14, 2024

2024 journal article

Capillary-osmotic wearable patch based on lateral flow assay for sweat potassium analysis

SENSORS AND ACTUATORS B-CHEMICAL, 419.

By: S. Mukherjee*, S. Salazar, T. Saha*, M. Dickey* & O. Velev*

author keywords: Wearable sweat sensors; Paper microfluidics; Potassium ion sensing; Colorimetric detection; Osmosis
Sources: Web Of Science, NC State University Libraries
Added: September 3, 2024

2024 article

Colloidal Engineering of Microplastic Capture with Biodegradable Soft Dendritic "Microcleaners"

Bang, R. S., Verster, L., Hong, H., Pal, L., & Velev, O. D. (2024, March 1). LANGMUIR, Vol. 3.

By: R. Bang n, L. Verster n, H. Hong n, L. Pal n & O. Velev n

Sources: Web Of Science, NC State University Libraries
Added: March 18, 2024

2024 article

Harvesting and manipulating sweat and interstitial fluid in microfluidic devices

Saha, T., Mukherjee, S., Dickey, M. D., & Velev, O. D. (2024, January 10). LAB ON A CHIP, Vol. 1.

By: T. Saha n, S. Mukherjee n, M. Dickey n & O. Velev n

TL;DR: This review reports on the utilization of microfluidics towards sweat and ISF management and transport, and focuses on microfluidic principles of sweat and ISF generation, transport, extraction, and management. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: January 22, 2024

2024 article

Isothermal Titration Calorimetry Reveals Entropy-Driven Bisphenol A Epoxy Resin Adhesion to Metal Oxide Surfaces

Jani, P. K., Farias, B. V., Jain, R. K., Houston, K. R., Velev, O. D., Santiso, E. E., … Khan, S. A. (2024, January 31). MACROMOLECULES, Vol. 1.

By: P. Jani n, B. Farias n, R. Jain n, K. Houston*, O. Velev n, E. Santiso n, L. Hsiao n, S. Khan n

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: February 1, 2024

2024 article

Sustainable Soft Electronics Combining Recyclable Metal Nanowire Circuits and Biodegradable Gel Film Substrates

Liu, Y., Ahmad, M., Venditti, R. A., Velev, O. D., & Zhu, Y. (2024, January 15). ADVANCED ELECTRONIC MATERIALS, Vol. 1.

By: Y. Liu n, M. Ahmad n, R. Venditti n, O. Velev n & Y. Zhu n

author keywords: biodegradable substrates; electronic waste; recyclable metal nanowires; sustainable soft electronics
Sources: Web Of Science, NC State University Libraries
Added: February 12, 2024

2024 journal article

Transparency-changing elastomers by controlling of the refractive index of liquid inclusions

JOURNAL OF PHYSICS-CONDENSED MATTER, 36(42).

By: S. Roh n, S. Yeo n, R. Bang n, K. Han n, K. Velikov n & O. Velev n

author keywords: optical metamaterials; liquid inclusions; stimuli-responsive soft matter
Sources: Web Of Science, NC State University Libraries
Added: July 30, 2024

2023 article

An integrated chemical engineering approach to understanding microplastics

Bang, R. S., Bergman, M., Li, T., Mukherjee, F., Alshehri, A. S., Abbott, N. L., … You, F. (2023, January 26). AICHE JOURNAL, Vol. 1.

author keywords: artificial intelligence; biochemical engineering; interfacial processes; microplastic; hermodynamics/statisticaL
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: February 20, 2023

2023 article

Assembly and manipulation of responsive and flexible colloidal structures by magnetic and capillary interactions

Basu, A., Okello, L. B. B., Castellanos, N., Roh, S., & Velev, O. D. D. (2023, March 14). SOFT MATTER, Vol. 3.

By: A. Basu n, L. Okello n, N. Castellanos n, S. Roh n & O. Velev n

Sources: Web Of Science, NC State University Libraries
Added: April 11, 2023

2023 article

Computational investigation of the phase behavior of colloidal squares with offset magnetic dipoles

Dorsey, M. A., Velev, O. D., & Hall, C. K. (2023, May 19). SOFT MATTER, Vol. 5.

By: M. Dorsey n, O. Velev n & C. Hall n

Sources: Web Of Science, NC State University Libraries
Added: June 12, 2023

2023 journal article

Hierarchically reinforced biopolymer composite films as multifunctional plastics substitute

CELL REPORTS PHYSICAL SCIENCE, 4(12).

By: Y. Kotb n & O. Velev n

Sources: Web Of Science, NC State University Libraries
Added: January 29, 2024

2023 review

Polymer Color Intelligence: Effect of Materials, Instruments, and Measurement Techniques - A Review

[Review of ]. ACS OMEGA, 8(26), 23257–23270.

By: S. Agate n, A. Williams n, J. Dougherty*, O. Velev n & L. Pal n

Sources: Web Of Science, NC State University Libraries, ORCID
Added: June 22, 2023

2023 article

The Science of Active Colloids Continues to Evolve while Crossing Discipline Boundaries

Krafft, M. P., Velev, O. D., & Abbott, N. L. (2023, April). CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Vol. 64.

By: M. Krafft*, O. Velev n & N. Abbott*

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: April 24, 2023

2022 review

A Critical Review of the Performance and Soil Biodegradability Profiles of Biobased Natural and Chemically Synthesized Polymers in Industrial Applications

[Review of ]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 56(4), 2071–2095.

By: P. Tyagi n, S. Agate n, O. Velev n, L. Lucia n & L. Pal n

author keywords: biodegradation; biopolymers; bioplastics; uv stability; packaging; sustainability
MeSH headings : Biodegradation, Environmental; Biopolymers / chemistry; Biopolymers / metabolism; Plastics; Polymers; Soil
TL;DR: This review discusses end-fate of biopolymers in soil and impact of residues on soil health, and design considerations and implications for sustainable polymers used, under consideration, and to be considered within the context of a rational biodegradable strategy are elaborated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: January 26, 2022

2022 review

AC electrohydrodynamic propulsion and rotation of active particles of engineered shape and asymmetry

[Review of ]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 59.

author keywords: Induced charge electrophoresis; Active particles; AC field
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: June 6, 2022

2022 journal article

An accelerated antibody aggregation test based on time sequenced dynamic light scattering

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 653.

By: C. Conner n, J. McAndrew*, S. Menegatti n & O. Velev n

author keywords: Protein colloidal stability; Protein aggregation; Dynamic light scattering; Antibodies
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: November 21, 2022

2022 article

Controlled adhesion, membrane pinning and vesicle transport by Janus particles

Ewins, E. J., Han, K., Bharti, B., Robinson, T., Velev, O. D., & Dimova, R. (2022, January 26). CHEMICAL COMMUNICATIONS, Vol. 1.

MeSH headings : Biological Transport; Cell Adhesion; Cell Membrane / metabolism; Magnetic Fields; Multifunctional Nanoparticles / metabolism; Static Electricity
Sources: Web Of Science, NC State University Libraries
Added: February 28, 2022

2022 journal article

Efficacy and Mechanisms of Copper Ion-Catalyzed Inactivation of Human Norovirus br

ACS INFECTIOUS DISEASES, 8(4), 855–864.

By: B. Mertens n, M. Moore n, L. Jaykus n & O. Velev n

author keywords: norovirus; viral inactivation; antiviral; copper; Tulane virus; disinfection
MeSH headings : Alloys / pharmacology; Capsid Proteins; Catalysis; Copper / pharmacology; Ions; Norovirus / drug effects; Norovirus / physiology; Virus Inactivation
TL;DR: The combined data demonstrate that stabilized Cu(I) ion solutions show promise as highly effective noroviral disinfectants in solution that can potentially be utilized at low concentrations for inactivation of human noroviruses. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: May 16, 2022

2022 article

Light scattering of colloidal suspensions: formation and stability in bourbon whiskeys

Williams, S. J., Islam, S., & Velev, O. D. (2022, May 2). JOURNAL OF THE INSTITUTE OF BREWING, Vol. 5.

By: S. Williams*, S. Islam n & O. Velev n

author keywords: dynamic light scattering; stability; bourbon; whiskey; aging
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: May 16, 2022

2022 journal article

Molecular structure effects on the mechanisms of corrosion protection of model epoxy coatings on metals

Materials Chemistry Frontiers, 7(2), 274–286.

By: Y. Kotb n, C. Serfass n, A. Cagnard*, K. Houston*, S. Khan n, L. Hsiao n, O. Velev n

Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: December 14, 2022

2022 journal article

Optically Modulated Propulsion of Electric-Field-Powered Photoconducting Janus Particles

PHYSICAL REVIEW APPLIED, 18(2).

By: M. Zehavi*, D. Sofer*, T. Miloh*, O. Velev n & G. Yossifon*

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: September 12, 2022

2022 article

Silica Supraparticles with Self-Oscillatory Vertical Propulsion: Mechanism & Theoretical Description

Kim, H.-ju, Sperling, M., Velev, O. D., & Gradzielski, M. (2022, June 14). Silica Supraparticles with Self-Oscillatory Vertical Propulsion: Mechanism & Theoretical Description. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, Vol. 6.

author keywords: droplet templating; oscillating movements; self-propelling; silica; supraparticles; superhydrophobic surfaces
Sources: Web Of Science, NC State University Libraries
Added: June 27, 2022

2022 journal article

Structure-Performance Relationships of Li-Ion Battery Fiber-Based Separators

ACS APPLIED POLYMER MATERIALS, 4(5), 3676–3686.

By: S. Luiso n, M. Petrecca n, A. Williams n, J. Christopher n, O. Velev n, B. Pourdeyhimi n, P. Fedkiw n

author keywords: meltblown; electrospun; shear; PVDF; nonwoven; separator; batteries
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: April 27, 2022

2022 article

Superhydrophobic and Anti-Icing Coatings Made of Hierarchically Nanofibrillated Polymer Colloids

Williams, A. H., Roh, S., Kotb, Y., & Velev, O. D. (2022, September 1). MACROMOLECULAR RAPID COMMUNICATIONS, Vol. 9.

By: A. Williams n, S. Roh n, Y. Kotb n & O. Velev n

author keywords: anti-icing; nanofibers; nonwovens; soft dendritic colloids; superhydrophobic coatings
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: September 12, 2022

2022 article

Wireless Wearable Electrochemical Sensing Platform with Zero- Power Osmotic Sweat Extraction for Continuous Lactate Monitoring

Saha, T., Songkakul, T., Knisely, C. T., Yokus, M. A., Daniele, M. A., Dickey, M. D., … Velev, O. D. (2022, July 12). ACS SENSORS, Vol. 7.

By: T. Saha n, T. Songkakul n, C. Knisely n, M. Yokus n, M. Daniele n, M. Dickey n, A. Bozkurt n, O. Velev n

author keywords: paper microfluidics; sweat; wearable device; electrochemical sensor; lactate; osmotic pumping; hydrogel
MeSH headings : Humans; Lactic Acid / analysis; Monitoring, Physiologic; Osmosis; Sweat / chemistry; Wearable Electronic Devices
TL;DR: A wearable system combining a hydrogel for osmotic sweat extraction, with a paper microfluidic channel for facilitating sweat transport and management, a screen-printed electrochemical lactate sensor, and a custom-built wireless wearable potentiostat system holds the potential of providing comprehensive and long-term continuous analysis of sweat lactate trends in the human body during rest and under exercising conditions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: July 13, 2022

2021 article

A Wearable Patch for Prolonged Sweat Lactate Harvesting and Sensing

2021 43RD ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE & BIOLOGY SOCIETY (EMBC), pp. 6863–6866.

By: T. Saha n, J. Fang n, M. Yokus n, S. Mukherjee n, A. Bozkurt n, M. Daniele n, M. Dickey n, O. Velev n

MeSH headings : Humans; Hydrogels; Lactic Acid; Sweat; Sweating; Wearable Electronic Devices
TL;DR: The on-skin performance of a non-invasive wearable sweat sampling patch that can harvest sweat at rest, during exercise, and post-exercise is reported, which can potentially provide useful information about the human metabolic activity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: April 25, 2022

2021 journal article

Bioscaffold Stiffness Mediates Aerosolized Nanoparticle Uptake in Lung Epithelial Cells

ACS APPLIED MATERIALS & INTERFACES, 13(43), 50643–50656.

By: A. Williams n, A. Hebert*, R. Boehm*, M. Huddleston*, M. Jenkins*, O. Velev n, M. Nelson*

author keywords: substrate stiffness; endocytosis; engineered materials; cell culture; nanoparticles
MeSH headings : A549 Cells; Aerosols / chemistry; Aerosols / metabolism; Epithelial Cells / chemistry; Epithelial Cells / metabolism; Humans; Interleukin-8 / metabolism; Nanoparticles / chemistry; Nanoparticles / metabolism; Particle Size; Polyurethanes / chemistry; Polyurethanes / metabolism; Surface Properties
TL;DR: In this study, highly porous, ultrasoft polymeric mats mimicking human tissues were formed from novel polyurethane soft dendritic colloids (PU SDCs), a factor found to be critical in analyzing nanomaterial cellular interactions and biological responses. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: November 23, 2021

2021 journal article

Field-Driven Reversible Alignment and Gelation of Magneto-Responsive Soft Anisotropic Microbeads

JOURNAL OF PHYSICAL CHEMISTRY B, 125(28), 7900–7910.

By: N. Castellanos n, B. Bharti* & O. Velev n

MeSH headings : Anisotropy; Gels; Magnetic Fields; Magnetics; Microspheres
TL;DR: The results prove that the soft magnetic microbeads enable a rich variety of structures and can serve as an experimental toolbox for modeling interactions in dipolar systems leading to various percolated networks, novel magneto-rheological materials, and smart gels. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 9, 2021

2021 journal article

In Vivo Toxicity Assessment of Chitosan-Coated Lignin Nanoparticles in Embryonic Zebrafish (Danio rerio)

NANOMATERIALS, 11(1).

author keywords: toxicology; development; biocompatibility; nanotoxicology; sustainability
TL;DR: E engineered lignin nanoparticle (LNP) coated with chitosan formulations at high concentrations were more toxic than plain LNPs. (via Semantic Scholar)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: January 11, 2021

2021 journal article

Osmotically Enabled Wearable Patch for Sweat Harvesting and Lactate Quantification

MICROMACHINES, 12(12).

By: T. Saha n, J. Fang n, S. Mukherjee n, C. Knisely n, M. Dickey n & O. Velev n

author keywords: paper microfluidics; sweat; sensing; hydrogels; lactate; osmotic pumping; evaporation; capillary; wicking; biochemical assay
TL;DR: The measurements show the that the total number of moles of lactate in sweat is correlated to sweat rate, and sweat appears to be a suitable biofluid for lactate quantification. (via Semantic Scholar)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: December 6, 2021

2021 journal article

Poly(Vinylidene Difluoride) Soft Dendritic Colloids as Li-Ion Battery Separators

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 168(2).

By: S. Luiso n, A. Williams n, M. Petrecca n, S. Roh*, O. Velev n & P. Fedkiw n

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: January 26, 2021

2021 journal article

Preparation of Reinforced Anisometric Patchy Supraparticles for Self-Propulsion

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 38(6).

By: H. Oguztuerk, L. Bauer*, I. Mantouvalou*, B. Kanngiesser, O. Velev n & M. Gradzielski*

author keywords: anisometric; fumed silica; magnetite; microfibrillated cellulose; platinum catalyst; superhydrophobic
Sources: Web Of Science, NC State University Libraries
Added: May 17, 2021

2021 journal article

Printable homocomposite hydrogels with synergistically reinforced molecular-colloidal networks

Nature Communications, 12(1), 2834.

By: A. Williams n, S. Roh n, A. Jacob n, S. Stoyanov n, L. Hsiao n & O. Velev n

TL;DR: A class of self-reinforced homocomposite hydrogels (HHGs) comprised of interpenetrating networks of multiscale hierarchy with synergistically enforced colloidal-molecular HHGs open up numerous opportunities for formulation of biocompatible gels with robust structure-property relationships. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, Crossref, ORCID
Added: July 6, 2021

2021 journal article

Understanding lignin micro- and nanoparticle nucleation and growth in aqueous suspensions by solvent fractionation

Green Chemistry, 23(2), 1001–1012.

By: J. Zwilling n, X. Jiang n, F. Zambrano n, R. Venditti n, H. Jameel n, O. Velev n, O. Rojas*, R. Gonzalez n

Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: March 15, 2021

2021 journal article

Wearable Osmotic-Capillary Patch for Prolonged Sweat Harvesting and Sensing

ACS APPLIED MATERIALS & INTERFACES, 13(7), 8071–8081.

By: T. Saha n, J. Fang n, S. Mukherjee n, M. Dickey n & O. Velev n

author keywords: sweat bioassay; paper microfluidics; hydrogels; osmotic pumping; lactate
MeSH headings : Biomarkers / analysis; Biosensing Techniques; Humans; Hydrogels / chemistry; Microfluidic Analytical Techniques; Osmotic Pressure; Paper; Skin / chemistry; Sweat / chemistry; Wearable Electronic Devices
TL;DR: In vitro and in vivo sampling of sweat through osmosis via the use of a hydrogel interfaced with the skin, without need for active perspiration is analyzed to highlight that lactate in sweat increases with exercise and as a direct result of muscle activity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: February 16, 2021

2021 journal article

What makes epoxy-phenolic coatings on metals ubiquitous: Surface energetics and molecular adhesion characteristics

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 608, 634–643.

By: Y. Kotb n, A. Cagnard*, K. Houston*, S. Khan n, L. Hsiao n & O. Velev n

author keywords: Adhesion; Polymer; metal interactions; Epoxy coatings; Contact angle; Surface energy; Pull-off test; XPS
MeSH headings : Epoxy Compounds; Epoxy Resins; Physical Phenomena; Steel; Wettability
TL;DR: Theoretical adhesion results reveal a superior adhesion of epoxy compared to phenolic resins, and epoxy resins having a higher content of epoxide-to-hydroxyl groups show improved theoretical and practical adhesion. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: November 15, 2021

2020 journal article

Active Reversible Swimming of Magnetically Assembled "Microscallops" in Non-Newtonian Fluids

LANGMUIR, 36(25), 7148–7154.

By: K. Han n, C. Shields n, B. Bharti*, P. Arratia* & O. Velev n

TL;DR: The dynamics of "microscallops" made of asymmetric magnetic cubes, which are assembled and actuated using magnetic fields, are investigated and it is found that the direction of propulsion changes with the size and structure of these assemblies. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 20, 2020

2020 journal article

Mechanism and control of "coffee-ring erosion'' phenomena in structurally colored ionomer films

SOFT MATTER, 16(11), 2683–2694.

By: S. Islam n & O. Velev n

TL;DR: It is found that sessile water droplets deposited on these films drive the formation of a rich variety of structures by an evaporation-induced effect of "coffee-ring erosion", and the integrity of these thin polyester films can be significantly improved by thermal densification without any further chemical curing. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: April 14, 2020

2020 journal article

Multiscale Self-Assembly of Distinctive Weblike Structures from Evaporated Drops of Dilute American Whiskeys

ACS NANO, 14(5), 5417–5425.

By: A. Carrithers*, M. Brown*, M. Rashed*, S. Islam n, O. Velev n & S. Williams*

author keywords: self-assembly; colloids; surface monolayers; Marangoni flow; droplet evaporation; whiskey
TL;DR: Data suggest that whiskey webs were unique to diluted American whiskey; however, similar structures were generated with other whiskeys under different conditions, demonstrating that this phenomenon could be used for sample analysis and counterfeit identification. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: June 22, 2020

2020 journal article

Scalable Formation of Concentrated Monodisperse Lignin Nanoparticles by Recirculation-Enhanced Flash Nanoprecipitation

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 37(7).

By: C. Conner n, A. Veleva n, V. Paunov*, S. Stoyanov* & O. Velev n

author keywords: benign nanomaterials; flash nanoprecipitation; monodisperse lignin nanoparticles; scale-up
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: June 22, 2020

2019 journal article

3D-Printed Silicone Soft Architectures with Programmed Magneto-Capillary Reconfiguration

ADVANCED MATERIALS TECHNOLOGIES, 4(4).

By: S. Roh n, L. Okello n, N. Golbasi n, J. Hankwitz n, J. Liu n, J. Tracy n, O. Velev n

author keywords: additive manufacturing; magnetoactive materials; metamaterials; soft intelligent materials
Sources: Web Of Science, NC State University Libraries, ORCID
Added: May 13, 2019

2019 journal article

Magnetic Actuators: 3D‐Printed Silicone Soft Architectures with Programmed Magneto‐Capillary Reconfiguration (Adv. Mater. Technol. 4/2019)

Advanced Materials Technologies, 4(4), 1970021.

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Crossref, NC State University Libraries
Added: February 5, 2020

2019 journal article

Mechanochromic composite elastomers for additive manufacturing and low strain mechanophore activation

POLYMER CHEMISTRY, 10(44), 5985–5991.

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: December 2, 2019

2019 journal article

Real-time monitoring and control of CHO cell apoptosis by in situ multifrequency scanning dielectric spectroscopy

PROCESS BIOCHEMISTRY, 80, 138–145.

By: F. Ma n, A. Zhang*, D. Chang n, O. Velev n, K. Wiltberger* & R. Kshirsagar*

author keywords: Dielectric spectroscopy; Apoptosis; Multi-frequency permittivity; Chinese Hamster Ovary (CHO) cell culture; Fed-batch; Feedback control
TL;DR: The results demonstrate that full-spectrum dielectric spectroscopy can be used as a facile tool for early detection of physiological changes and process adjustment in real-time to enhance bioreactor process productivity and robustness. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: June 4, 2019

2019 journal article

Soft dendritic microparticles with unusual adhesion and structuring properties

NATURE MATERIALS, 18(12), 1315-+.

By: S. Roh n, A. Williams n, R. Bang n, S. Stoyanov* & O. Velev n

MeSH headings : Adhesiveness; Dendrimers / chemistry; Mechanical Phenomena; Microspheres; Molecular Weight; Polystyrenes / chemistry; Surface Properties
TL;DR: The fabrication of hierarchically structured polymeric microparticles having branched nanofibre coronas with a dendritic morphology is described, which exhibit gelation at very low volume fractions, strong interparticle adhesion and binding into coatings and non-woven sheets. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: December 9, 2019

2018 journal article

Nanomaterials Fabrication by Interfacial Templating and Capillary Engineering in Multiphasic Liquids

AICHE JOURNAL, 64(10), 3558–3564.

By: S. Roh n & O. Velev n

author keywords: polymer nanomaterials; soft matter; capillary paste; 3-D printing; smart gels
Sources: Web Of Science, NC State University Libraries
Added: October 19, 2018

2018 journal article

Probing Contaminant-Induced Alterations in Chlorophyll Fluorescence by AC-Dielectrophoresis-Based 2D-Algal Array

BIOSENSORS-BASEL, 8(1).

By: C. Siebman*, O. Velev n & V. Slaveykova*

author keywords: whole cell array; dielectrophoresis; flow cytometry; chlorophyll fluorescence; copper; copper oxide nanoparticles; mercury; Chlamydomonas reinhardtii
MeSH headings : Biosensing Techniques / instrumentation; Biosensing Techniques / methods; Chlamydomonas reinhardtii / cytology; Chlamydomonas reinhardtii / drug effects; Chlamydomonas reinhardtii / metabolism; Chlorophyll / analysis; Chlorophyll / metabolism; Copper / metabolism; Environmental Pollutants / metabolism; Equipment Design; Fluorescence; Microscopy, Fluorescence / instrumentation; Microscopy, Fluorescence / methods; Nanoparticles / metabolism; Tissue Array Analysis / instrumentation; Tissue Array Analysis / methods
TL;DR: Overall, DEP-based 2D-arrays of algal cells with fluorescence detection appear to be suitable for stain-free probing the effects on the photosynthetic microorganisms in highly polluted environment. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 journal article

Propulsion and assembly of remotely powered p-type silicon microparticles

APL MATERIALS, 6(12).

Sources: Web Of Science, NC State University Libraries
Added: January 14, 2019

2018 journal article

Reconfigurable engineered motile semiconductor microparticles

NATURE COMMUNICATIONS, 9.

By: U. Ohiri*, C. Shields*, K. Han*, T. Tyler*, O. Velev* & N. Jokerst*

TL;DR: Controlled, collective behavior in silicon microparticles, which are fabricated via conventional semiconductor methods are demonstrated, which may enable advanced applications that include remotely powered microsensors, artificial muscles, reconfigurable neural networks and computational systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 journal article

Revisiting the colloidal fundamentals of water-dispersible polyesters: interactions and self-assembly of polymer nanoaggregates in water

SOFT MATTER, 14(11), 2118–2130.

By: S. Islam n, D. Inglefield* & O. Velev n

TL;DR: A model for nanoaggregate formation in water based on the critical surface charge density of these nanoparticles is presented, which may enable the design of novel high-performance surfactant-free waterborne dispersion systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 journal article

Soft electrodes combining hydrogel and liquid metal

SOFT MATTER, 14(17), 3296–3303.

By: T. Shay n, O. Velev n & M. Dickey n

TL;DR: It is shown it is possible to interface hydrogel with liquid metal (eutectic gallium indium, EGaIn) electrodes to create completely soft and deformable electrodes that provide low resistance traces through the gel without altering its mechanical properties. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2018 journal article

Stabilization of oil continuous emulsions with colloidal particles from water-insoluble plant proteins

FOOD HYDROCOLLOIDS, 82, 89–95.

By: M. Rutkevicius n, S. Allred n, O. Velev n & K. Velikov*

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: October 19, 2018

2018 journal article

Supercolloidal Spinners: Complex Active Particles for Electrically Powered and Switchable Rotation

ADVANCED FUNCTIONAL MATERIALS, 28(35).

author keywords: electrically powered particles; engineered active particles; particle rotors; self-propelling particles; switchable rotation
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: October 19, 2018

2018 journal article

Toxicological Assessment of a Lignin Core Nanoparticle Doped with Silver as an Alternative to Conventional Silver Core Nanoparticles

ANTIBIOTICS-BASEL, 7(2).

By: C. Nix*, B. Harper*, C. Conner n, A. Richter n, O. Velev n & S. Harper*

author keywords: nanotechnology; environmentally-friendly; pesticide; antimicrobial; zebrafish
TL;DR: Overall, the study indicates that the lignin core is an effective alternative to conventional solid core AgNPs for potentially reducing the burden of silver released into the environment from a variety of consumer products. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

3D Printing by Multiphase Silicone/Water Capillary Inks

ADVANCED MATERIALS, 29(30).

By: S. Roh n, D. Parekh n, B. Bharti*, S. Stoyanov* & O. Velev n

TL;DR: This study demonstrates a new efficient technique for 3D printing with PDMS by using a capillary suspension ink containing PDMS in the form of both precured microbeads and uncured liquid precursor, dispersed in water as continuous medium. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Alternating current-dielectrophoresis collection and chaining of phytoplankton on chip: Comparison of individual species and artificial communities

Biosensors, 7(1).

By: C. Siebman*, O. Velev n & V. Slaveykova*

Contributors: C. Siebman*, O. Velev n & V. Slaveykova*

author keywords: AC dielectrophoresis; chaining efficiency; green algae; cyanobacteria; diatom; phytoplankton; freshwater
MeSH headings : Biosensing Techniques / instrumentation; Cell Polarity; Chlamydomonas reinhardtii / physiology; Diatoms / physiology; Fresh Water / microbiology; Lab-On-A-Chip Devices / microbiology; Phytoplankton / physiology; Synechocystis / physiology; Water Quality
TL;DR: The results prove the potential of DEP to discriminate different phytoplankton species depending on their effective polarizability and to enable their manipulation, such as specific collection or separation in freshwater. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2017 article

Biocoatings: challenges to expanding the functionality of waterborne latex coatings by incorporating concentrated living microorganisms

Flickinger, M. C., Bernal, O. I., Schulte, M. J., Broglie, J. J., Duran, C. J., Wallace, A., … Velev, O. D. (2017, July). JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, pp. 791–808.

By: M. Flickinger n, O. Bernal n, M. Schulte n, J. Broglie n, C. Duran n, A. Wallace n, C. Mooney n, O. Velev n

author keywords: Biocoatings; Biocatalysts; Waterborne coating functionality; Nanoporous coatings; Engineered microbes in coatings; Bioabsorbers; Desiccation tolerance
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Chained Iron Microparticles for Directionally Controlled Actuation of Soft Robots

ACS APPLIED MATERIALS & INTERFACES, 9(13), 11895–11901.

By: M. Schmauch*, S. Mishra*, B. Evans*, O. Velevt & J. Tracy*

Contributors: M. Schmauch*, S. Mishra*, B. Evans*, O. Velevt & J. Tracy*

author keywords: magnetic particles; chains; elastomer; anisotropy; actuation; lifter; valve; pump
TL;DR: The "specific torque", the torque per field per mass of magnetic particles, is introduced as a figure of merit for assessing and comparing the performance of lifters and related devices. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2017 journal article

Design and characterization of hydrogel-based microfluidic devices with biomimetic solute transport networks

BIOMICROFLUIDICS, 11(2).

By: H. Koo* & O. Velev n

Contributors: H. Koo* & O. Velev n

TL;DR: This work defines three key designs of microfluidic-hydrogel devices, having linear, T-shaped, and branched channels, and reports results of numerical simulation of the process of their infusion with solute carried by the incoming fluid. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

Engineering of Self-Propelling Microbots and Microdevices Powered by Magnetic and Electric Fields

ADVANCED FUNCTIONAL MATERIALS, 28(25).

By: K. Han n, C. Shields n & O. Velev n

author keywords: active colloids; autonomous locomotion microbots; engineered particles; self-propelling particles
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Fabrication of Photoreactive Biocomposite Coatings via Electric Field-Assisted Assembly of Cyanobacteria

Langmuir, 33(21), 5304–5313.

By: O. Bernal, B. Bharti*, M. Flickinger* & O. Velev*

MeSH headings : Biocompatible Materials; Biomimetics; Cell Survival; Cyanobacteria; Polyesters
TL;DR: The assembly of structured cyanobacteria coatings that optimize cell surface coverage and preserve cell viability after immobilization are achieved, a step toward the development of flexible multilayered cell-based photoabsorbing biomaterials that can serve as components of "biomimetic leaves" for utilizing solar energy to recycle CO2 into fuels or chemicals. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Crossref, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2017 journal article

Formation of periodic size-segregated stripe pattern via directed self-assembly of binary colloids and its mechanism

APPLIED SURFACE SCIENCE, 435, 512–520.

By: S. Das*, E. Duraia*, O. Velev n, M. Amiri* & G. Beall*

author keywords: Convective assembly; Periodic stripe pattern; Binary colloids; Size segregation
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Hydrogel-enabled osmotic pumping for microfluidics: towards wearable human-device interfaces

LAB ON A CHIP, 17(4), 710–716.

By: T. Shay n, M. Dickey n & O. Velev n

Contributors: T. Shay n, M. Dickey n & O. Velev n

MeSH headings : Equipment Design; Glucose / analysis; Humans; Hydrogels / chemistry; Lab-On-A-Chip Devices; Membranes, Artificial; Microfluidic Analytical Techniques / instrumentation; Microfluidic Analytical Techniques / methods; Models, Biological; Osmosis; Sweat / chemistry; Wearable Electronic Devices
TL;DR: Initial testing has shown the device can pump accurate levels of glucose across the membrane and through a microchannel to a reservoir with a glucose sensor, and Sensors and electrodes can be implemented in future microfluidic devices operating on these principles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

Investigation of interfacial properties of pure and mixed poloxamers for surfactant-mediated shear protection of mammalian cells

COLLOIDS AND SURFACES B-BIOINTERFACES, 156, 358–365.

By: D. Chang n, R. Fox n, E. Hicks n, R. Ferguson*, K. Chang*, D. Osborne*, W. Hu*, O. Velev n

author keywords: Poloxamer; Mammalian cells; Shear sensitivity; Interfacial tension; Foam stability; Bioreactors
MeSH headings : Animals; CHO Cells; Cell Survival / drug effects; Cells, Cultured; Cricetulus; Poloxamer / chemistry; Poloxamer / pharmacology; Surface Tension; Surface-Active Agents / chemistry; Surface-Active Agents / pharmacology
TL;DR: The mechanism of disruption by P407 was determined to be independent of cell-to-bubble attachment, suggesting that poloxamer adsorption to and subsequent reinforcement of the cell membrane may play a key role in protecting cells in high shear environments. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Reduction of defects in self-assembling colloidal monolayer via surface modifiers and periodic mechanical vibration

SURFACE & COATINGS TECHNOLOGY, 319, 353–358.

author keywords: Convective assembly; Nano spheres; Monolayer; Periodic vibrations; Defect reduction
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Sequence-encoded colloidal origami and microbot assemblies from patchy magnetic cubes

SCIENCE ADVANCES, 3(8).

By: K. Han n, C. Shields*, N. Diwakar*, B. Bharti n, G. Lopez* & O. Velev n

MeSH headings : Algorithms; Biomimetic Materials; Colloids / chemistry; Magnetic Fields; Models, Theoretical
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Simulation study on the structural properties of colloidal particles with offset dipoles

SOFT MATTER, 13(17), 3134–3146.

By: D. Rutkowski n, O. Velev n, S. Klapp* & C. Hall n

TL;DR: Results from quasi-2D Monte Carlo simulations of systems of colloidal particles with offset transversely-oriented extended dipole-like charge distributions interacting via an intermediate-ranged Yukawa potential are described, finding that the effective cooling rate in these simulations has an impact on the structures formed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 review

The Evolution of Active Particles: Toward Externally Powered Self-Propelling and Self-Reconfiguring Particle Systems

[Review of ]. CHEM, 3(4), 539–559.

By: C. Shields n & O. Velev n

TL;DR: How active particles have evolved as a result of advances in particle fabrication is discussed by analyzing the relationship between their design and mechanism of self-propulsion. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2016 journal article

Active Steerable Catalytic Supraparticles Shuttling on Preprogrammed Vertical Trajectories

ADVANCED MATERIALS INTERFACES, 3(15).

Contributors: M. Sperling*, H. Kim n, O. Velev n & M. Gradzielski*

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 article

Active particles propelled into researchers' focus

Abbott, N. L., & Velev, O. D. (2016, February). CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Vol. 21, pp. 1–3.

By: N. Abbott* & O. Velev n

Contributors: N. Abbott* & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Bending of Responsive Hydrogel Sheets Guided by Field-Assembled Microparticle Endoskeleton Structures

SMALL, 12(17), 2283–2290.

By: D. Morales n, B. Bharti n, M. Dickey n & O. Velev n

Contributors: D. Morales n, B. Bharti n, M. Dickey n & O. Velev n

MeSH headings : Biomimetics; Hydrogels; Particle Size; Robotics
TL;DR: Hydrogel composites that respond to stimuli can form the basis of new classes of biomimetic actuators and soft robotic components that guide the macroscopic bending pattern of the actuators. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Capillary Bridging as a Tool for Assembling Discrete Clusters of Patchy Particles

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 138(45), 14948–14953.

By: B. Bharti n, D. Rutkowski n, K. Han n, A. Kumar n, C. Hall n & O. Velev n

Contributors: B. Bharti n, D. Rutkowski n, K. Han n, A. Kumar n, C. Hall n & O. Velev n

TL;DR: This study demonstrates the ability of capillary bridging as a versatile tool to assemble thermoresponsive clusters and aggregates and can be extended further to assemble particles with nonspherical shapes and complex surface chemistries enabling the formation of sophisticated colloidal molecules. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Controlled Formation of Patchy Anisometric Fumed Silica Supraparticles in Droplets on Bent Superhydrophobic Surfaces

Particle and Particle Systems Characterization, 34(1).

Contributors: M. Sperling*, V. Spiering*, O. Velev n & M. Gradzielski*

author keywords: anisometric; evaporation; patchy; silica; superhydrophobic surfaces
Source: ORCID
Added: March 21, 2019

2016 journal article

Dissolution behaviour of ferric pyrophosphate and its mixtures with soluble pyrophosphates: Potential strategy for increasing iron bioavailability

FOOD CHEMISTRY, 208, 97–102.

By: T. Tian n, E. Blanco n, S. Smoukov*, O. Velev n & K. Velikov*

Contributors: T. Tian n, E. Blanco n, S. Smoukov*, O. Velev n & K. Velikov*

author keywords: Iron pyrophosphate; Food fortification; Iron supplementation; Iron bioavailability
MeSH headings : Beverages; Biological Availability; Dietary Supplements; Diphosphates / chemistry; Food, Fortified; Humans; Iron / chemistry; Solubility
TL;DR: In the presence of pyrophosphate ions the solubility of FePP strongly increases at pH 5-8.5, which leads to an 8-10-fold increase in the total ionic iron concentration, beneficial for enhancing iron bioavailability, which important for the design of fortified food, beverages, and nutraceutical products. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Ionoprinted Multi-Responsive Hydrogel Actuators

MICROMACHINES, 7(6).

By: D. Morales n, I. Podolsky n, R. Mailen n, T. Shay n, M. Dickey n & O. Velev n

Contributors: D. Morales n, I. Podolsky n, R. Mailen n, T. Shay n, M. Dickey n & O. Velev n

author keywords: hydrogel actuators; soft robotics; stimuli responsive systems; ionoprinting; pNIPAAm
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Multidirectional colloidal assembly in concurrent electric and magnetic fields

SOFT MATTER, 12(37), 7747–7758.

By: B. Bharti n, F. Kogler*, C. Hall n, S. Klapp* & O. Velev n

Contributors: B. Bharti n, F. Kogler*, C. Hall n, S. Klapp* & O. Velev n

TL;DR: This novel methodology of introducing and interpreting double-dipolar particle interactions may assist in the assembly of colloidal coatings, dynamically reconfigurable particle networks, and bidirectional active structures. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Organic-inorganic patchy particles as a versatile platform for fluid-in-fluid dispersion stabilisation

FARADAY DISCUSSIONS, 191, 73–88.

By: E. Blanco n, S. Smoukov n, O. Velev n & K. Velikov*

Contributors: E. Blanco n, S. Smoukov n, O. Velev n & K. Velikov*

TL;DR: Protein-based organic-inorganic surface heterogeneous particles represent a new versatile platform for the stabilization of fluid-in-fluid dispersions and as precursors for the assembly of advanced functional materials. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Role of network geometry on fluid displacement in microfluidic color-changing windows

SMART STRUCTURES AND SYSTEMS, 18(5), 865–884.

By: A. Ucar*, O. Velev* & H. Koo

Contributors: A. Uçar*, O. Velev* & H. Koo

author keywords: COMSOL simulation; microfluidic network; flow uniformity; liquid displacement efficiency; color-changing smart windows
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Synthesis and characterization of biodegradable lignin nanoparticles with tunable surface properties

Langmuir, 32(25), 6468–6477.

By: A. Richter n, B. Bharti n, H. Armstrong n, J. Brown n, D. Plemmons n, V. Paunov*, S. Stoyanov*, O. Velev n

Contributors: A. Richter n, B. Bharti n, H. Armstrong n, J. Brown n, D. Plemmons n, V. Paunov*, S. Stoyanov*, O. Velev n

TL;DR: The data show that the properties of the nanoparticles are governed by the type of lignin used and the presence of polyelectrolyte surface coating, and how the colloidal stability and dispersion properties of these two types of nanoparticles vary as a function of pH and salinities. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2016 journal article

The effect of charge separation on the phase behavior of dipolar colloidal rods

SOFT MATTER, 12(22), 4932–4943.

By: D. Rutkowski n, O. Velev n, S. Klapp* & C. Hall n

Contributors: D. Rutkowski n, O. Velev n, S. Klapp* & C. Hall n

TL;DR: This work has simulated a system of dipolar colloidal rods at fixed aspect ratio using discontinuous molecular dynamics (DMD) to investigate how the charge separation of an embedded dipole affects the types of assemblies that occur. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

An environmentally benign antimicrobial nanoparticle based on a silver-infused lignin core

NATURE NANOTECHNOLOGY, 10(9), 817-+.

By: A. Richter n, J. Brown n, B. Bharti n, A. Wang*, S. Gangwal*, K. Houck*, E. Hubal*, V. Paunov* ...

Contributors: A. Richter n, J. Brown n, B. Bharti n, A. Wang*, S. Gangwal*, K. Houck*, E. Cohen Hubal*, V. Paunov*, S. Stoyanov*, O. Velev n

MeSH headings : Animals; Anti-Infective Agents / chemistry; Anti-Infective Agents / pharmacology; Anti-Infective Agents / toxicity; Bacteria / drug effects; Cell Line; Cell Survival / drug effects; Colony Count, Microbial; Embryo, Nonmammalian / drug effects; High-Throughput Screening Assays; Humans; Lignin / chemistry; Lignin / toxicity; Microbial Viability / drug effects; Nanoparticles / chemistry; Nanoparticles / toxicity; Rats; Silver / chemistry; Silver / pharmacology; Silver / toxicity; Zebrafish
TL;DR: It is shown that lignin nanoparticles infused with silver ions and coated with a cationic polyelectrolyte layer form a biodegradable and green alternative to silver nanoparticles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Artificial leaf device for hydrogen generation from immobilised C. reinhardtii microalgae

JOURNAL OF MATERIALS CHEMISTRY A, 3(41), 20698–20707.

Contributors: A. Das*, M. Esfahani*, O. Velev n, N. Pamme* & V. Paunov*

TL;DR: A fully biomimetic leaf-like device for hydrogen production which allows incorporated fabric-immobilised microalgae culture to be simultaneously hydrated with media and harvested from the produced hydrogen in a continuous flow regime without the need to replace the algal culture. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Assembly of Reconfigurable Colloidal Structures by Multidirectional Field-Induced Interactions

Langmuir, 31(29), 7897–7908.

By: B. Bharti n & O. Velev n

Contributors: B. Bharti n & O. Velev n

MeSH headings : Anisotropy; Colloids / chemistry; Electricity; Magnetic Fields; Nanostructures / chemistry; Particle Size
TL;DR: It is discussed how directional polarization interactions induced by external electric and magnetic fields can be used to assemble complex particles or particle mixtures into lattices of tailored structure. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2015 journal article

Characterization and control of surfactant-mediated Norovirus interactions

SOFT MATTER, 11(44), 8621–8631.

By: B. Mertens n & O. Velev n

Contributors: B. Mertens n & O. Velev n

MeSH headings : Colloids / chemistry; Hydrogen-Ion Concentration; Norovirus / chemistry; Norovirus / drug effects; Protein Aggregates; Static Electricity; Surface-Active Agents / chemistry; Surface-Active Agents / pharmacology; Vaccines, Virus-Like Particle / chemistry; Vaccines, Virus-Like Particle / drug effects
TL;DR: Zeta potential data is used to characterize virus surface charge and interpret the mechanisms behind these demonstrated surfactant-virus interactions, which will aid in practical formulations for virus inactivation and removal from contaminated surfaces. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 conference paper

Directed assembly at all length scales: The pathway towards future metamaterials

Education Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting. http://www.scopus.com/inward/record.url?eid=2-s2.0-84968820806&partnerID=MN8TOARS

By: B. Bharti, G. Findenegg & O. Velev

Contributors: B. Bharti, G. Findenegg & O. Velev

Source: ORCID
Added: March 21, 2019

2015 journal article

Field-assisted self-assembly process: General discussion

Faraday Discussions, 181, 463–479.

By: Y. Sun, L. Scarabelli, N. Kotov, M. Tebbe, X. Lin, W. Brullot, L. Isa, P. Schurtenberger ...

Contributors: Y. Sun, L. Scarabelli, N. Kotov, M. Tebbe, X. Lin, W. Brullot, L. Isa, P. Schurtenberger ...

TL;DR: Yugang Sun, Leonardo Scarabelli, Nicholas Kotov, Moritz Tebbe, Xiao-Min Lin, Ward Brullot, Lucio Isa, Peter Schurtenberger, Helmuth Moehwald, Igor Fedin, Orlin Velev, Damien Faivre, Christopher Sorensen, Regine Perzynski, Munish Chanana, Zhihai Li and Suvojit Ghosh. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

2015 journal article

Field-assisted self-assembly process: general discussion

Faraday Discussions, 181, 463–479.

By: Y. Sun, L. Scarabelli, N. Kotov, M. Tebbe, X. Lin, W. Brullot, L. Isa, P. Schurtenberger ...

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Formation of Anisometric Fumed Silica Supraparticles - Mechanism and Application Potential

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 229(7-8), 1055–1074.

By: M. Sperling*, O. Velev n & M. Gradzielski*

Contributors: M. Sperling*, O. Velev n & M. Gradzielski*

author keywords: Anisometric Particles; Fumed Silica; Evaporation; Self-Assembly; Droplets; Superhydrophobic Surface
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Generic model for tunable colloidal aggregation in multidirectional fields

SOFT MATTER, 11(37), 7356–7366.

By: F. Kogler*, O. Velev n, C. Hall n & S. Klapp*

Contributors: F. Kogler*, O. Velev n, C. Hall n & S. Klapp*

TL;DR: A model which allows continuous change in the particle interactions from point-dipole-like to patchy-like (with four patches) is proposed, and it is shown that the non-equilibrium aggregation occurring at low densities and temperatures transforms from conventional diffusion-limited cluster aggregation (DLCA) to slippery DLCA involving rotating bonds. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Magnetophoretic assembly of flexible nanoparticles/lipid microfilaments

FARADAY DISCUSSIONS, 181, 437–448.

By: B. Bharti n, A. Fameau & O. Velev n

Contributors: B. Bharti n, A. Fameau & O. Velev n

MeSH headings : Lipids / chemistry; Magnetics; Nanoparticles / chemistry
TL;DR: This study characterize and analyse the mechanism of the magnetic field driven assembly of lipid-coated iron oxide nanoparticles into flexible microfilaments and demonstrates that surface stickiness combined with the magnetic response of the filaments can be used further to twist, bend and bundle the microfilament structure. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Multidirectional, Multicomponent Electric Field Driven Assembly of Complex Colloidal Chains

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 229(7-8), 1075–1088.

By: B. Bharti n & O. Velev n

Contributors: B. Bharti n & O. Velev n

author keywords: Directed Assembly; Dielectrophoresis; Colloids; Field Driven Assembly
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Nanocapillarity-mediated magnetic assembly of nanoparticles into ultraflexible filaments and reconfigurable networks

NATURE MATERIALS, 14(11), 1104-+.

By: B. Bharti n, A. Fameau*, M. Rubinstein* & O. Velev n

Contributors: B. Bharti n, A. Fameau*, M. Rubinstein* & O. Velev n

MeSH headings : DNA / chemistry; Magnetite Nanoparticles / chemistry; Magnetite Nanoparticles / ultrastructure; Models, Chemical
TL;DR: Capillarity-mediated binding between magnetic nanoparticles coated with a liquid lipid shell can be used for the assembly of ultraflexible microfilaments and network structures that can be magnetically regenerated on mechanical damage. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

New routes to control nanoparticle synthesis: General discussion

Faraday Discussions, 181, 147–179.

By: J. Reguera, L. Scarabelli, C. Petit, R. Siramdas, H. Wolf, M. Chanana, X. Liu, M. Martin ...

Contributors: J. Reguera, L. Scarabelli, C. Petit, R. Siramdas, H. Wolf, M. Chanana, X. Liu, M. Martin ...

TL;DR: This competition aims to provide a platform for the development of a new generation of negotiators and facilitators of human rights in the Middle East. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

2015 journal article

Remote Steering of Self-Propelling Microcircuits by Modulated Electric Field

ADVANCED FUNCTIONAL MATERIALS, 25(34), 5512–5519.

By: R. Sharma n & O. Velev n

Contributors: R. Sharma n & O. Velev n

author keywords: active particles; alternating (AC) electrohydrodynamics; duty cycle modulation; microswimmers; remote steering; self-propelling diodes
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Scalable Liquid Shear-Driven Fabrication of Polymer Nanofibers

ADVANCED MATERIALS, 27(16), 2642–2647.

By: S. Smoukov n, T. Tian n, N. Vitchuli*, S. Gangwal n, P. Geisen*, M. Wright*, E. Shim n, M. Marquez* ...

Contributors: S. Smoukov n, T. Tian n, N. Vitchuli*, S. Gangwal n, P. Geisen*, M. Wright*, E. Shim n, M. Marquez*, J. Fowler*, O. Velev n

author keywords: antisolvents; composite nanofibers; liquid shearing; nanofibers; nanoribbons
MeSH headings : Chloroform / chemistry; Ethanol / chemistry; Glycerol / chemistry; Lactic Acid / chemistry; Magnetite Nanoparticles / chemistry; Nanofibers / chemistry; Nanotechnology / methods; Polyesters; Polymers / chemical synthesis; Polymers / chemistry; Sodium Hydroxide / chemistry; Solvents / chemistry; Viscosity; Water / chemistry
TL;DR: A simple process for batch or continuous formation of polymer nanofibers and other nanomaterials in the bulk of a sheared fluid medium is introduced and may be of high value to commercial nanotechnology, as it can be easily scaled up to the fabrication of staple nanofiber at rates that may exceed tens of kilograms per hour. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Selective and directional actuation of elastomer films using chained magnetic nanoparticles

NANOSCALE, 8(3), 1309–1313.

By: S. Mishra n, M. Dickey n, O. Velev n & J. Tracy n

Contributors: S. Mishra n, M. Dickey n, O. Velev n & J. Tracy n

TL;DR: Selective and directional actuation of elastomer films utilizing magnetic anisotropy introduced by chains of Fe3O4 magnetic nanoparticles (MNPs) is reported. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Smart Nonaqueous Foams from Lipid-Based Oleogel

Langmuir, 31(50), 13501–13510.

By: A. Fameau*, S. Lam n, A. Arnould*, C. Gaillard*, O. Velev n & A. Saint-Jalmes*

Contributors: A. Fameau*, S. Lam n, A. Arnould*, C. Gaillard*, O. Velev n & A. Saint-Jalmes*

MeSH headings : Fatty Alcohols / chemistry; Lipids / chemistry; Organic Chemicals / chemistry; Particle Size; Plant Oils / chemistry; Sunflower Oil; Surface Properties; Temperature
TL;DR: A simple way to produce oil foams from oleogels, whose liquid phase is a mixture of sunflower oil and fatty alcohols, that can be made to be photoresponsive by using internal heat sources such as carbon black particles, which can absorb UV light and dissipate the absorbed energy as heat. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2015 journal article

The dynamics and stability of lubricating oil films during droplet transport by electrowetting in microfluidic devices

BIOMICROFLUIDICS, 9(3).

By: J. Kleinert n, V. Srinivasan*, A. Rival*, C. Delattre*, O. Velev n & V. Pamula*

Contributors: J. Kleinert n, V. Srinivasan*, A. Rival*, C. Delattre*, O. Velev n & V. Pamula*

TL;DR: A comprehensive understanding of the oil film behavior will enable more robust electrowetting-actuated lab-on-a-chip devices through prevention of loss of species from droplets and contamination of surfaces at points where films may break. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Two-dimensional algal collection and assembly by combining AC-dielectrophoresis with fluorescence detection for contaminant-induced oxidative stress sensing

Biosensors, 5(2), 319–336.

By: C. Siebman*, O. Velev n & V. Slaveykova*

Contributors: C. Siebman*, O. Velev n & V. Slaveykova*

author keywords: whole cell assembly; dielectrophoresis; fluorescence; contamination; reactive oxygen species; Chlamydomonas reinhardtii
MeSH headings : Biosensing Techniques / instrumentation; Biosensing Techniques / methods; Chlamydomonas reinhardtii / drug effects; Chlamydomonas reinhardtii / physiology; Copper / toxicity; Electrophoresis; Lab-On-A-Chip Devices / microbiology; Metal Nanoparticles / toxicity; Methylmercury Compounds / toxicity; Microscopy, Fluorescence; Oxidative Stress; Reactive Oxygen Species / metabolism; Water Pollutants, Chemical / toxicity
TL;DR: The potential of combining AC-dielectrophoretically assembled two-dimensional algal structures with cell metabolic analysis using fluorescence staining, as a rapid analytical tool for probing the effect of contaminants in highly impacted environment is demonstrated. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

2014 journal article

Analysis of the Field-Assisted Permanent Assembly of Oppositely Charged Particles

LANGMUIR, 30(22), 6577–6587.

By: B. Bharti n, G. Findenegg* & O. Velev n

Contributors: B. Bharti n, G. Findenegg* & O. Velev n

TL;DR: A set of assembly rules for permanent colloidal chain formation by oppositely charged particles are formulated that make possible the precise large-scale formation of particle chains of any length, which can serve as components in new gels, biomaterials, and fluids with controlled rheology. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2014 conference paper

Engineered kraft lignin particles for foam stabilization

International Congress on Energy 2014, ICE 2014 - Topical Conference at the 2014 AIChE Annual Meeting, 3. http://www.scopus.com/inward/record.url?eid=2-s2.0-84953706002&partnerID=MN8TOARS

By: S. Lam, A. Tibbits & O. Velev

Contributors: S. Lam, A. Tibbits & O. Velev

Source: ORCID
Added: March 21, 2019

2014 article

On-chip microelectrode impedance analysis of mammalian cell viability during biomanufacturing

Sharma, R., Blackburn, T., Hu, W., Wiltberger, K., & Velev, O. D. (2014, September). BIOMICROFLUIDICS, Vol. 8.

By: R. Sharma n, T. Blackburn*, W. Hu*, K. Wiltberger* & O. Velev n

Contributors: R. Sharma n, T. Blackburn*, W. Hu*, K. Wiltberger* & O. Velev n

TL;DR: The microelectrode technique was found to be sensitive to physiological changes taking place inside the cells before their membrane integrity is compromised, and accurate determination of the metabolic status during this initial period may be essential for several biotechnology operations. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2014 review

Pickering stabilization of foams and emulsions with particles of biological origin

[Review of ]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 19(5), 490–500.

By: S. Lam n, K. Velikov* & O. Velev n

Contributors: S. Lam n, K. Velikov* & O. Velev n

author keywords: Biopolymer; Biologically derived particles; Cellulose; Starch; Lignin; Protein; Chitin; Pickering; Foams; Emulsions
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2014 conference paper

Role of biopolymer particles in the efficient stabilization of Pickering foams

Engineering Sciences and Fundamentals 2014 - Core Programming Area at the 2014 AIChE Annual Meeting, 2. http://www.scopus.com/inward/record.url?eid=2-s2.0-84954133375&partnerID=MN8TOARS

By: S. Lam, R. Von Klitzing & O. Velev

Contributors: S. Lam, R. Von Klitzing & O. Velev

Source: ORCID
Added: March 21, 2019

2014 article

Synthesis and Novel Applications of Biopolymer and Biologically Derived Particles

Velikov, K. P., & Velev, O. D. (2014, October). CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Vol. 19, pp. 381–382.

By: K. Velikov* & O. Velev n

Contributors: K. Velikov* & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Alternating current-dielectrophoresis driven on-chip collection and chaining of green microalgae in freshwaters

BIOMICROFLUIDICS, 7(2).

By: C. Suscillon*, O. Velev n & V. Slaveykova*

Contributors: C. Suscillon*, O. Velev n & V. Slaveykova*

author keywords: biomembranes; bioMEMS; cellular biophysics; electrophoresis; lakes; microfluidics; microorganisms; rivers; toxicology
TL;DR: The application of AC-field had no effect on algal autofluorescence, cell membrane damage, or oxidative stress damages in C. reinhardtii and the cells suspended in freshwaters showed anomalously high chaining at long exposure times. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Biomimetic photocatalytic reactor with a hydrogel-embedded microfluidic network

JOURNAL OF MATERIALS CHEMISTRY A, 1(37), 11106–11110.

By: H. Koo n & O. Velev n

Contributors: H. Koo n & O. Velev n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 53(2), 586–590.

By: M. Sperling*, O. Velev n & M. Gradzielski n

Contributors: M. Sperling*, O. Velev n & M. Gradzielski n

author keywords: anisometric particles; colloids; shape control; silica; supraparticles
TL;DR: Anisometric silica supraparticles are produced by a simple process of evaporation of sessile droplets containing fumed silica deposited on a superhydrophobic substrate, and become anisometric beyond a threshold concentration, as quantified by light microscopy. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Electro-actuated hydrogel walkers with dual responsive legs

SOFT MATTER, 10(9), 1337–1348.

By: D. Morales n, E. Palleau n, M. Dickey n & O. Velev n

Contributors: D. Morales n, E. Palleau n, M. Dickey n & O. Velev n

MeSH headings : Electrolytes / chemistry; Hydrogel, Polyethylene Glycol Dimethacrylate; Polymers / chemistry; Robotics; Solutions / chemistry
TL;DR: It is demonstrated that "osmotically passive" fixed charges play an important role in controlling the bending magnitude of the gel networks and exemplify a simple way to move and manipulate soft matter devices and robots in aqueous solutions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 review

Engineering Cellular Photocomposite Materials Using Convective Assembly

[Review of ]. MATERIALS, 6(5), 1803–1825.

By: J. Jenkins n, M. Flickinger n & O. Velev n

Contributors: J. Jenkins n, M. Flickinger n & O. Velev n

author keywords: cellular photocomposites; continuous convective-sedimentation assembly; colloidal coatings; artificial leaves; biocomposite materials
TL;DR: This paper reviews the non-biological convective assembly literature, with an emphasis on how the method can be modified to deposit living cells starting from a batch process to its current state as a continuous process capable of fabricating larger multi-layer biocomposite coatings from diverse particle suspensions. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 conference paper

External field directed co-assembly of rigid and ultra-flexible permanent chains

Engineering Sciences and Fundamentals 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future, 2. http://www.scopus.com/inward/record.url?eid=2-s2.0-84911871745&partnerID=MN8TOARS

By: B. Bharti, A. Fameau, G. Findenegg & O. Velev

Contributors: B. Bharti, A. Fameau, G. Findenegg & O. Velev

Source: ORCID
Added: March 21, 2019

2013 journal article

Field-directed assembly of patchy anisotropic microparticles with defined shape

SOFT MATTER, 9(38), 9219–9229.

By: C. Shields*, S. Zhu n, Y. Yang*, B. Bharti n, J. Liu*, B. Yellen*, O. Velev n, G. Lopez*

Contributors: C. Wyatt Shields Iv, S. Zhu n, Y. Yang*, B. Bharti n, J. Liu*, B. Yellen*, O. Velev n, G. López*

TL;DR: The resulting structures, and similar ones produced through the field-directed assembly of patchy anisotropic particles, can possess unique electrical and optical properties and may have potential applications in a number of future technology applications such as microactuators, metamaterials and multiferroic materials. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 review

Ionic current devices-Recent progress in the merging of electronic, microfluidic, and biomimetic structures

[Review of ]. BIOMICROFLUIDICS, 7(3).

By: H. Koo n & O. Velev n

Contributors: H. Koo n & O. Velev n

TL;DR: The recent progress in the emerging area of devices and circuits operating on the basis of ionic currents, which operate at the intersection of electrochemistry, electronics, and microfluidics, and their potential applications are inspired by essential biological processes such as neural transmission. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Multi-stimuli responsive foams combining particles and self-assembling fatty acids

CHEMICAL SCIENCE, 4(10), 3874–3881.

By: A. Fameau*, S. Lam n & O. Velev n

Contributors: A. Fameau*, S. Lam n & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 article

PATCHY NANOPARTICLES Curvature makes a difference

Velev, O. D. (2013, September). NATURE NANOTECHNOLOGY, Vol. 8, pp. 620–621.

By: O. Velev n

Contributors: O. Velev n

TL;DR: The local curvature of dumbbell-shaped nanoparticles can be used to control the ionization state of a molecular layer adsorbed on their surfaces and the self-assembly patterns of the particles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Regenerable Photovoltaic Devices with a Hydrogel-Embedded Microvascular Network

SCIENTIFIC REPORTS, 3.

By: H. Koo n & O. Velev n

Contributors: H. Koo n & O. Velev n

MeSH headings : Biomimetics / instrumentation; Electric Power Supplies; Equipment Reuse; Hydrogels / chemistry; Light; Microfluidics / instrumentation; Microvessels; Plant Leaves; Regeneration; Solar Energy
TL;DR: This work reports an organic dye photovoltaic system that has been endowed with such microfluidic regeneration functionality, andetitive restoration of photvoltaic performance after intensive device degradation is demonstrated. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Reversible patterning and actuation of hydrogels by electrically assisted ionoprinting

NATURE COMMUNICATIONS, 4(1).

By: E. Palleau n, D. Morales n, M. Dickey n & O. Velev n

Contributors: E. Palleau n, D. Morales n, M. Dickey n & O. Velev n

TL;DR: An ‘ionoprinting’ technique with the capability to topographically structure and actuate hydrated gels in two and three dimensions by locally patterning ions via their directed injection and complexation, assisted by electric fields is introduced. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Stability and Viscoelasticity of Magneto-Pickering Foams

Langmuir, 29(32), 10019–10027.

By: E. Blanco n, S. Lam n, S. Smoukov n, K. Velikov*, S. Khan n & O. Velev n

Contributors: E. Blanco n, S. Lam n, S. Smoukov n, K. Velikov*, S. Khan n & O. Velev n

MeSH headings : Iron Carbonyl Compounds / chemistry; Magnetic Fields; Methylcellulose / analogs & derivatives; Methylcellulose / chemistry; Oleic Acids / chemistry; Particle Size; Surface Properties; Viscosity
TL;DR: A new class of bistable Pickering foams, which can remain intact for weeks at room temperature but can be destroyed rapidly and on-demand with the use of a magnetic field, is developed. (via Semantic Scholar)
Sources: ORCID, Crossref
Added: March 21, 2019

2013 book

Transport control of fluid and solutes in microchannels using ac field and semiconductor diodes

In Fluid Transport: Theory, Dynamics and Applications (pp. 241–258). http://www.scopus.com/inward/record.url?eid=2-s2.0-84892285213&partnerID=MN8TOARS

By: D. Petsev & O. Velev

Contributors: D. Petsev & O. Velev

Source: ORCID
Added: March 21, 2019

2013 journal article

Two-dimensional colloidal networks induced by a uni-axial external field

SOFT MATTER, 9(8), 2518–2524.

By: H. Schmidle*, S. Jaeger, C. Hall n, O. Velev n & S. Klapp*

Contributors: H. Schmidle*, S. Jäger*, C. Hall n, O. Velev n & S. Klapp*

Sources: ORCID, Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 conference paper

XanoShear™ Large-scale fabrication of functional Nanofibers

International Symposium on Fibers Interfacing the World. http://www.scopus.com/inward/record.url?eid=2-s2.0-84969813025&partnerID=MN8TOARS

By: N. Vitchuli, T. Tian, S. Smoukov, S. Gangwal, P. Geisen, M. Wright, O. Velev

Contributors: N. Vitchuli, T. Tian, S. Smoukov, S. Gangwal, P. Geisen, M. Wright, O. Velev

Source: ORCID
Added: March 21, 2019

2012 journal article

Co-assembly of oppositely charged particles into linear clusters and chains of controllable length

Scientific Reports, 2.

By: B. Bharti n, G. Findenegg* & O. Velev n

Contributors: B. Bharti n, G. Findenegg* & O. Velev n

TL;DR: It is demonstrated how well-organized, permanent clusters and chains of micron-sized particles can be assembled by applying DEP to mixtures of oppositely charged microspheres, and it is found that the length of the formed chains depends on size ratio as well as the number ratio of the two species. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2012 journal article

Deposition of composite coatings from particle–particle and particle–yeast blends by convective-sedimentation assembly

Journal of Colloid and Interface Science, 380(1), 192–200.

By: J. Jenkins n, M. Flickinger n & O. Velev n

Contributors: J. Jenkins n, M. Flickinger n & O. Velev n

author keywords: Colloidal coatings; Size-selective segregation; Bimodal blends; Convective assembly of biocomposite yeast blends
MeSH headings : Aluminum / chemistry; Cells, Immobilized / cytology; Colloids / chemistry; Glass / chemistry; Microspheres; Particle Size; Polyesters / chemistry; Polypropylenes / chemistry; Saccharomyces cerevisiae / cytology; Sulfates / chemistry
TL;DR: This study shows how substrate wettability, suspension composition, particle size ratio and surface charge affect the deposition process and resulting coating microstructure (particle ordering and void space) and confirms the existence of significant polymer particle-yeast interactions and formation of particle aggregates that disrupt coatingmicrostructure during deposition. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, Crossref, NC State University Libraries
Added: August 6, 2018

2012 journal article

Fabrication of Environmentally Biodegradable Lignin Nanoparticles

CHEMPHYSCHEM, 13(18), 4235–4243.

author keywords: biodegradable; lignin; nanoparticles; pH dependence; porosity
MeSH headings : Biodegradation, Environmental; Chemical Precipitation; Drug Carriers / chemistry; Drug Delivery Systems / methods; Drug Stability; Hydrogen-Ion Concentration; Hydrophobic and Hydrophilic Interactions; Lignin / chemistry; Nanoparticles / chemistry; Particle Size; Polyethylene Glycols / chemistry; Solutions / chemistry
TL;DR: The study reveals that lignin NPs from the ethylene glycol-based precipitation contain densely packed lignIn domains which explain the stability of the NPs even at high pH, which suggest that these NPs are highly porous and consist of smaller lign in domains. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2012 journal article

Gel-Based Self-Propelling Particles Get Programmed To Dance

LANGMUIR, 28(26), 10128–10135.

By: R. Sharma n, S. Chang* & O. Velev n

Contributors: R. Sharma n, S. Chang* & O. Velev n

TL;DR: A class of gel-based self-propelling particles moving by the Marangoni effect in an oscillatory mode made of an ethanol-infused polyacrylamide hydrogel contained in plastic tubing that can find applications as mixers and cargo carriers in lab-on-a-chip devices, and in various platforms for sensing and processing at the microscale. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2012 book

Materials deposition in evaporating menisci - Fundamentals and engineering applications of the convective assembly process

In Evaporative Self-Assembly of Ordered Complex Structures (pp. 109–156).

By: B. Prevo* & O. Velev n

Contributors: B. Prevo* & O. Velev n

Source: ORCID
Added: March 21, 2019

2012 journal article

Microfluidic elastomer composites with switchable vis-IR transmittance

Soft Matter, 8(44), 11232–11235.

By: A. U?ar & O. Velev n

Contributors: A. Uçar n & O. Velev n

UN Sustainable Development Goal Categories
Source: ORCID
Added: March 21, 2019

2012 journal article

Microfluidic elastomer composites with switchable vis-IR transmittance

Soft Matter, 8(44), 11232–11235.

By: A. Ucar & O. Velev

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

On-chip latex agglutination immunoassay readout by electrochemical impedance spectroscopy

Lab on a Chip - Miniaturisation for Chemistry and Biology, 12(21), 4279–4286.

By: S. Gupta*, P. Kilpatrick*, E. Melvin n & O. Velev n

Contributors: S. Gupta*, P. Kilpatrick*, E. Melvin n & O. Velev n

MeSH headings : Antibodies / chemistry; Antigen-Antibody Reactions; Antigens / chemistry; Dielectric Spectroscopy / methods; Electrodes; Immunoassay / methods; Microfluidic Analytical Techniques / methods; Microspheres; Particle Size; Surface Properties
TL;DR: A new class of impedance-based lab-on-chip immunosensors in which the immunoagglutination of latex is monitored by electrochemical impedance spectroscopy (EIS) holds promise for developing sensitive miniaturized sensors for rapid immunotesting. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2011 article

Colloidal dispersions by engineering and design

Velikov, K. P., & Velev, O. D. (2011, April). CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Vol. 16, pp. 81–83.

By: K. Velikov* & O. Velev n

Contributors: K. Velikov* & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Convective Assembly of 2D Lattices of Virus-like Particles Visualized by In-Situ Grazing-Incidence Small-Angle X-Ray Scattering

SMALL, 7(8), 1043–1050.

By: C. Ashley*, D. Dunphy*, Z. Jiang*, E. Carnes*, Z. Yuan*, D. Petsev*, P. Atanassov*, O. Velev n ...

Contributors: C. Ashley*, D. Dunphy*, Z. Jiang*, E. Carnes*, Z. Yuan*, D. Petsev*, P. Atanassov*, O. Velev n ...

MeSH headings : Bacteriophages / chemistry; Glycerol / chemistry; Scattering, Small Angle; Time Factors; Virion / chemistry; Water / chemistry; X-Ray Diffraction / methods
TL;DR: In-situ grazing-incidence small-angle X-ray scattering (GISAXS) is used to follow the self-assembly process in real time to characterize the mechanism of superlattice formation, with the ultimate goal of tailoring film deposition conditions to optimize long-range order. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Electric-Field-Controlled Flow in Nanoscale-Thin Wetting Films

LANGMUIR, 28(5), 3037–3044.

By: J. Kleinert n, S. Kim n & O. Velev n

Contributors: J. Kleinert n, S. Kim n & O. Velev n

MeSH headings : Electromagnetic Fields; Membranes, Artificial; Microfluidic Analytical Techniques / instrumentation; Microfluidic Analytical Techniques / methods; Nanostructures / chemistry; Particle Size; Surface Properties; Wettability
TL;DR: A novel nanofluidic system based on electroosmotic flow in nanoscale-thin aqueous wetting films is reported, and the mobilities of the thin fluid layer and the flow marker were lower than the predictions of the electrokinetic theory. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Ionic Current Rectification in Soft-Matter Diodes with Liquid-Metal Electrodes

ADVANCED FUNCTIONAL MATERIALS, 22(3), 625–631.

By: J. So n, H. Koo n, M. Dickey n & O. Velev n

Contributors: J. So n, H. Koo n, M. Dickey n & O. Velev n

author keywords: hydrogels; liquid metal; ionic current rectification; polyelectrolytes; soft matter; soft electronics; electrochemical diodes
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Magnetically responsive pickering foams

Journal of the American Chemical Society, 133(35), 13856–13859.

By: S. Lam n, E. Blanco n, S. Smoukov n, K. Velikov* & O. Velev n

Contributors: S. Lam n, E. Blanco n, S. Smoukov n, K. Velikov* & O. Velev n

MeSH headings : Iron Carbonyl Compounds / chemistry; Magnetic Fields; Magnets / chemistry; Methylcellulose / analogs & derivatives; Methylcellulose / chemistry; Oleic Acid / chemistry; Particle Size; Solutions / chemistry
TL;DR: A new class of Pickering foams which can be manipulated using a magnetic field is introduced, stabilized by a mixture of magnetic and nonmagnetic particles, and has potential applications in noncontact defoaming processes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

2011 journal article

On-chip collection of particles and cells by AC electroosmotic pumping and dielectrophoresis using asymmetric microelectrodes

Biomicrofluidics, 5(3).

By: E. Melvin n, B. Moore n, K. Gilchrist*, S. Grego* & O. Velev n

Contributors: E. Melvin n, B. Moore n, K. Gilchrist*, S. Grego* & O. Velev n

author keywords: biochemistry; electrophoresis; lab-on-a-chip; microelectrodes; microfluidics; osmosis
TL;DR: A particle collection device capable of concentrating micron-sized particles in a predetermined area by combining AC electroosmosis (ACEO) and dielectrophoresis (DEP), which is amenable to integration with a variety of detection techniques such as optical evanescent waveguide sensing. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2011 journal article

Phase diagram of two-dimensional systems of dipole-like colloids

SOFT MATTER, 8(5), 1521–1531.

By: H. Schmidle*, C. Hall n, O. Velev n & S. Klapp*

Contributors: H. Schmidle*, C. Hall n, O. Velev n & S. Klapp*

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Towards All-Soft Matter Circuits: Prototypes of Quasi-Liquid Devices with Memristor Characteristics

ADVANCED MATERIALS, 23(31), 3559-+.

By: H. Koo n, J. So n, M. Dickey n & O. Velev n

Contributors: H. Koo n, J. So n, M. Dickey n & O. Velev n

MeSH headings : Electrodes; Electrolytes / chemistry; Electronics; Hydrogel, Polyethylene Glycol Dimethacrylate / chemistry; Metals / chemistry; Oxides / chemistry; Robotics
TL;DR: A new class of electrically functional devices composed entirely of soft, liquid-based materials that display memristor-like characteristics is presented, which may become the core of next generation memory devices because of their low energy consumption and high data density and performance. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2011 journal article

Ultrathin film coatings of aligned cellulose nanocrystals from a convective-shear assembly system and their surface mechanical properties

Soft Matter, 7(5), 1957.

By: I. Hoeger n, O. Rojas n, K. Efimenko n, O. Velev n & S. Kelley n

Contributors: I. Hoeger n, O. Rojas n, K. Efimenko n, O. Velev n & S. Kelley n

Sources: ORCID, NC State University Libraries, Crossref, NC State University Libraries
Added: August 6, 2018

2010 journal article

Aqueous soft matter based photovoltaic devices

Journal of Materials Chemistry, 21(1), 72–79.

By: H. Koo n, S. Chang*, J. Slocik*, R. Naik* & O. Velev n

Contributors: H. Koo n, S. Chang*, J. Slocik*, R. Naik* & O. Velev n

UN Sustainable Development Goal Categories
Source: ORCID
Added: March 21, 2019

2010 journal article

Directed assembly of yeast cells into living yeastosomes by microbubble templating

Soft Matter, 6(15), 3494–3498.

By: M. Brandy*, O. Cayre*, R. Fakhrullin*, O. Velev n & V. Paunov*

Contributors: M. Brandy*, O. Cayre*, R. Fakhrullin*, O. Velev n & V. Paunov*

TL;DR: The fabrication of yeastosomes is reported, which consist of a spherical monolayer of living yeast cells held together by colloid interactions, which resembles the primitive forms of multicellular species, like Volvox, and other algae and could be regarded as one possible stage of the evolutionary development ofMulticellularity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Electric-Field-Assisted Convective Assembly of Colloidal Crystal Coatings

LANGMUIR, 26(12), 10380–10385.

By: J. Kleinert n, S. Kim n & O. Velev n

Contributors: J. Kleinert n, S. Kim n & O. Velev n

TL;DR: The data suggest that the EWOD-increased liquid surface area results in increased evaporation-driven particle flux and crystal assembly that is up to five times more rapid. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2010 journal article

Erratum: Live celloidosome structures based on the assembly of individual cells by colloid interactions (Physical Chemistry Chemical Physics (2010) 12 (11912-11922) DOI: 10.1039/c0cp00131g)

Physical Chemistry Chemical Physics, 12(45). http://www.scopus.com/inward/record.url?eid=2-s2.0-78649768387&partnerID=MN8TOARS

By: R. Fakhrullin, M. Brandy, O. Cayre, O. Velev & V. Paunov

Contributors: R. Fakhrullin, M. Brandy, O. Cayre, O. Velev & V. Paunov

Source: ORCID
Added: March 21, 2019

2010 journal article

Ion-current diode with aqueous gel/sio<inf>2</inf> nanofilm interfaces

Small, 6(13), 1393–1397.

By: H. Koo n, S. Chang* & O. Velev n

Contributors: H. Koo n, S. Chang* & O. Velev n

MeSH headings : Electricity; Electrolytes / chemistry; Electronics / instrumentation; Gels / chemistry; Ions; Nanostructures / chemistry; Nonlinear Dynamics; Silicon Dioxide / chemistry
TL;DR: Non-linear ion transport through nanoscale structures can be used in new types of microcircuit, inspired by biological processes such as adenosine triphosphate synthesis and neural transmission, as well as signal processing, for example, ionic current rectification and amplification as in electronic circuits. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Live celloidosome structures based on the assembly of individual cells by colloid interactions

Physical Chemistry Chemical Physics, 12(38), 11912–11922.

By: R. Fakhrullin*, M. Brandy*, O. Cayre*, O. Velev n & V. Paunov*

Contributors: R. Fakhrullin*, M. Brandy*, O. Cayre*, O. Velev n & V. Paunov*

MeSH headings : Air; Calcium Carbonate / chemistry; Capsules / chemistry; Carboxymethylcellulose Sodium / chemistry; Colloids / chemistry; Crystallization; Magnetics; Microbubbles; Nanoparticles / chemistry; Polyamines / chemistry; Tissue Engineering / methods; Tissue Scaffolds / chemistry; Yeasts / cytology
TL;DR: Two alternative approaches were developed to form celloidosome structures using magnetically functionalised core-shell microparticles which resulted in the formation of celloidsomes with needle-like and cubic-like geometries which follows the original morphology of the calcium carbonate microcrystals. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Macromol. Rapid Commun. 2/2010

Macromolecular Rapid Communications, 31(2), NA-NA.

By: V. Rastogi, A. García, M. Marquez* & O. Velev

Sources: Crossref, NC State University Libraries
Added: September 8, 2020

2010 journal article

Microfluidic characterization of sustained solute release from porous supraparticles

Physical Chemistry Chemical Physics, 12(38), 11975–11983.

By: V. Rastogi n, K. Velikov* & O. Velev n

Contributors: V. Rastogi n, K. Velikov* & O. Velev n

MeSH headings : Coloring Agents / administration & dosage; Delayed-Action Preparations / chemistry; Diffusion; Equipment Design; Microfluidics / instrumentation; Microfluidics / methods; Microspheres; Porosity
TL;DR: A novel microfluidic technique for precise characterization of controlled release of solute from porous latex supraparticles in a laminar flow environment and the role of the uniformly porous supraparticle matrix for the prolonged continuous solute delivery is illustrated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Programmed assembly of metallodielectric patchy particles in external AC electric fields

Soft Matter, 6(7), 1413–1418.

By: S. Gangwal n, A. Pawar*, I. Kretzschmar* & O. Velev n

Contributors: S. Gangwal n, A. Pawar*, I. Kretzschmar* & O. Velev n

UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Self-assembly in binary mixtures of dipolar colloids: Molecular dynamics simulations

JOURNAL OF CHEMICAL PHYSICS, 133(6).

By: A. Goyal n, C. Hall n & O. Velev n

Contributors: A. Goyal n, C. Hall n & O. Velev n

author keywords: colloids; crystallisation; gels; molecular dynamics method; phase diagrams; self-assembly
MeSH headings : Anisotropy; Colloids / chemistry; Models, Chemical; Molecular Dynamics Simulation; Nanostructures; Particle Size; Phase Transition; Surface Properties
TL;DR: Two novel aspects of the results are the appearance of a bicontinuous gel consisting of two interpenetrating networks--one formed by chains of particles with high dipole moment and the other formed by chained particles with low dipole moments, and cocrystals of large and small dipolar colloid particles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2010 book

Stabilization of Thin Films, Foams, Emulsions and Bifluid Gels with Surface-Active Solid Particles

In Colloids and Interface Science Series (Vol. 3, pp. 277–306).

By: K. Velikov* & O. Velev n

Contributors: K. Velikov* & O. Velev n

Source: ORCID
Added: March 21, 2019

2010 book

Transport control of fluid and solutes in microchannels using AC field and semiconductor diodes

In Continuum Mechanics (pp. 85–103). http://www.scopus.com/inward/record.url?eid=2-s2.0-84892110534&partnerID=MN8TOARS

By: D. Petsev & O. Velev

Contributors: D. Petsev & O. Velev

Source: ORCID
Added: March 21, 2019

2009 journal article

Anisotropie particle synthesis inside droplet templates on superhydrophobic surfaces

Macromolecular Rapid Communications, 31(2), 190–195.

By: V. Rastogi n, A. Garcia*, M. Marquez & O. Velev n

Contributors: V. Rastogi n, A. Garcia*, M. Marquez & O. Velev n

author keywords: anisotropic supraparticles; droplet templating; hierarchically ordered materials; nanoparticles; self-assembly; superhydrophobic surfaces
TL;DR: It is demonstrated how droplet templates dispensed on superhydrophobic substrates can be used to fabricate both shape-anisotropic ("doughnut") and composition-an isotropic ("patchy magnetic") supraparticles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2009 journal article

Bicontinuous gels formed by self-assembly of dipolar colloid particles

SOFT MATTER, 6(3), 480–484.

By: A. Goyal n, C. Hall n & O. Velev n

Contributors: A. Goyal n, C. Hall n & O. Velev n

UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Deposition of Coatings from Live Yeast Cells and Large Particles by "Convective-Sedimentation" Assembly

LANGMUIR, 25(10), 5692–5702.

By: L. Jerrim n & O. Velev n

Contributors: L. Jerrim n & O. Velev n

MeSH headings : Computer Simulation; Glass / chemistry; Microspheres; Saccharomyces cerevisiae / chemistry; Saccharomyces cerevisiae / cytology
TL;DR: The experiments and numerical simulations demonstrated that the deposition process is strongly affected by the presence of sedimentation, and the "convective-sedimentation" assembly method was used to deposit mixed layers of live cells and large latex particles as an example of immobilized biologically active composite coatings. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Intense and selective coloration of foams stabilized with functionalized particles

JOURNAL OF MATERIALS CHEMISTRY, 19(38), 7043–7049.

By: S. Kim n, H. Barraza* & O. Velev n

Contributors: S. Kim n, H. Barraza* & O. Velev n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 review

Materials Fabricated by Micro- and Nanoparticle Assembly - The Challenging Path from Science to Engineering

[Review of ]. ADVANCED MATERIALS, 21(19), 1897–1905.

By: O. Velev n & S. Gupta n

Contributors: O. Velev n & S. Gupta n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Materials of Controlled Shape and Stiffness with Photocurable Microfluidic Endoskeleton

ADVANCED MATERIALS, 21(27), 2803-+.

By: S. Chang n, A. Ucar n, G. Swindlehurst n, R. Bradley n, F. Renk* & O. Velev n

Contributors: S. Chang n, A. Uçar n, G. Swindlehurst n, R. Bradley n, F. Renk* & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Microfluidic Endoskeletons: Materials of Controlled Shape and Stiffness with Photocurable Microfluidic Endoskeleton (Adv. Mater. 27/2009)

Advanced Materials, 21(27), n/a-n/a.

By: S. Chang n, A. Uçar n, G. Swindlehurst n, R. Bradley n, F. Renk* & O. Velev n

Sources: Crossref, NC State University Libraries
Added: September 8, 2020

2009 journal article

On-Chip Dielectrophoretic Coassembly of Live Cells and Particles into Responsive Biomaterials

LANGMUIR, 26(5), 3441–3452.

By: S. Gupta n, R. Alargova n, P. Kilpatrick n & O. Velev n

Contributors: S. Gupta n, R. Alargova n, P. Kilpatrick n & O. Velev n

MeSH headings : Animals; Cell Adhesion; Cell Membrane / metabolism; Cell Survival; Colloids; Electricity; Electrodes; Electrolytes / chemistry; Electrophoresis / instrumentation; Fibroblasts / cytology; Hydrogen-Ion Concentration; Latex; Magnetics; Mice; Microchip Analytical Procedures; NIH 3T3 Cells; Saccharomyces cerevisiae / cytology; Static Electricity
TL;DR: It is reported how live cells and functionalized colloidal particles can be coassembled into a variety of freely suspended bioactive structures using dielectrophoresis on a chip. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Particle-localized AC and DC manipulation and electrokinetics

Annual Reports on the Progress of Chemistry - Section C, 105, 213–246.

By: O. Velev n, S. Gangwal n & D. Petsev*

Contributors: O. Velev n, S. Gangwal n & D. Petsev*

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

2009 journal article

Reconfigurable responsive structures assembled from magnetic Janus particles

SOFT MATTER, 5(6), 1285–1292.

By: S. Smoukov n, S. Gangwal n, M. Marquez* & O. Velev n

Contributors: S. Smoukov n, S. Gangwal n, M. Marquez* & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 conference paper

Computer simulation of self-assembly of dipolar colloid particles for the design of stimuli-responsive materials

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-79952308978&partnerID=MN8TOARS

By: A. Goyal, C. Hall & O. Velev

Contributors: A. Goyal, C. Hall & O. Velev

Source: ORCID
Added: March 21, 2019

2008 conference paper

Control of nanoscale flow in thin wetting films by electric field

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-79952301934&partnerID=MN8TOARS

By: J. Kleinert, S. Kim & O. Velev

Contributors: J. Kleinert, S. Kim & O. Velev

Source: ORCID
Added: March 21, 2019

2008 journal article

Cover Picture: Synthesis of Light-Diffracting Assemblies from Microspheres and Nanoparticles in Droplets on a Superhydrophobic Surface (Adv. Mater. 22/2008)

Advanced Materials, 20(22), NA-NA.

By: V. Rastogi n, S. Melle*, O. Calderón*, A. García*, M. Marquez* & O. Velev n

Sources: Crossref, NC State University Libraries
Added: September 8, 2020

2008 journal article

Dielectrophoretic Assembly of Metallodielectric Janus Particles in AC Electric Fields

LANGMUIR, 24(23), 13312–13320.

By: S. Gangwal n, O. Cayre n & O. Velev n

Contributors: S. Gangwal n, O. Cayre n & O. Velev n

TL;DR: The assembly of Janus metallodielectric particles driven by AC electric fields at frequencies above 10 kHz is demonstrated and the relation between field-induced dielectrophoretic force, field distribution, and structure of the assemblies is investigated. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 conference paper

Dielectrophoretic assembly of new colloidal structures from janus and patchy metallodielectric particles

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-79952303416&partnerID=MN8TOARS

By: O. Velev, S. Gangwal, A. Pawar & I. Kretzschmar

Contributors: O. Velev, S. Gangwal, A. Pawar & I. Kretzschmar

Source: ORCID
Added: March 21, 2019

2008 conference paper

Electric field-assisted convective assembly of large-domain colloidal crystals

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-79952294231&partnerID=MN8TOARS

By: J. Kleinert, S. Kim & O. Velev

Contributors: J. Kleinert, S. Kim & O. Velev

Source: ORCID
Added: March 21, 2019

2008 journal article

Induced-charge electrophoresis of metallodielectric particles

Physical Review Letters, 100(5).

By: S. Gangwal n, O. Cayre n, M. Bazant* & O. Velev n

Contributors: S. Gangwal n, O. Cayre n, M. Bazant* & O. Velev n

TL;DR: Experimental observations of the motion of Janus microparticles with one dielectric and one metal-coated hemisphere induced by uniform fields of frequency 100 Hz-10 kHz in NaCl solutions suggest this phenomenon may find applications in microactuators, microsensors, and microfluidic devices. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2008 journal article

Long-term stabilization of foams and emulsions with in-situ formed microparticles from hydrophobic cellulose

LANGMUIR, 24(17), 9245–9253.

By: H. Wege n, S. Kim n, V. Paunov n, Q. Zhong n & O. Velev n

Contributors: H. Wege n, S. Kim n, V. Paunov n, Q. Zhong n & O. Velev n

TL;DR: A new class of nontoxic inexpensive cellulose-based particle stabilizers has the potential to substitute conventional synthetic surfactants, especially in edible, pharmaceutical and biodegradable products. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 journal article

Microwave, Photo- and Thermally Responsive PNIPAm-Gold Nanoparticle Microgels

LANGMUIR, 24(20), 11959–11966.

By: B. Budhlall n, M. Marquez n & O. Velev n

Contributors: B. Budhlall n, M. Marquez n & O. Velev n

MeSH headings : Acrylic Resins / chemistry; Colloids / chemistry; Equipment Design; Fluorescent Dyes / pharmacology; Gold / chemistry; Hemoglobins / chemistry; Humans; Light; Metal Nanoparticles / chemistry; Microfluidics; Microwaves; Polymers / chemistry; Polysorbates / chemistry; Surface Properties; Surface-Active Agents / chemistry
TL;DR: This is the first study to demonstrate that incorporating AuNPs speeds up the response kinetics of PNIPAm, and hence enhances the sensitivity to external stimuli of PnIPAm. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 journal article

On-chip electric field driven assembly of biocomposites from live cells and functionalized particles

Soft Matter, 4(4), 726–730.

By: S. Gupta n, R. Alargova n, P. Kilpatrick n & O. Velev n

Contributors: S. Gupta n, R. Alargova n, P. Kilpatrick n & O. Velev n

TL;DR: Live cells and surface-functionalized synthetic microparticles are co-assembled on electrically controlled chips to yield permanent chains and one cell layer thick membranes that can be freely manipulated in external magnetic fields. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: NC State University Libraries, ORCID, NC State University Libraries
Added: August 6, 2018

2008 journal article

Phase diagram for stimulus-responsive materials containing dipolar colloidal particles

PHYSICAL REVIEW E, 77(3).

By: A. Goyal n, C. Hall n & O. Velev n

Contributors: A. Goyal n, C. Hall n & O. Velev n

TL;DR: The self-assembly, structure, crystallization and/or gelation of systems of colloid particles with permanent dipole moments immersed in a high-dielectric solvent are explored, and the very low volume fraction gel phases and the well-ordered crystal phases are promising for advanced materials applications. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 patent

Process for preparing microrods using liquid-liquid dispersion

Washington, DC: U.S. Patent and Trademark Office.

By: O. Velev & R. Alargova

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Synthesis of Light-Diffracting Assemblies from Microspheres and Nanoparticles in Droplets on a Superhydrophobic Surface

ADVANCED MATERIALS, 20(22), 4263–4268.

By: V. Rastogi n, S. Melle*, O. Calderon*, A. Garcia*, M. Marquez* & O. Velev n

Contributors: V. Rastogi n, S. Melle*, O. Calderón*, A. García*, M. Marquez* & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Characterization and optimization of gold nanoparticle-based silver-enhanced immunoassays

ANALYTICAL CHEMISTRY, 79(10), 3810–3820.

By: S. Gupta n, S. Huda n, P. Kilpatrick n & O. Velev n

Contributors: S. Gupta n, S. Huda n, P. Kilpatrick n & O. Velev n

MeSH headings : Adsorption; Antibodies; Antigens / analysis; Gold; Immunoassay / methods; Immunoassay / standards; Kinetics; Nanoparticles; Sensitivity and Specificity; Silver; Solutions
TL;DR: The role of mass transfer was investigated, and a model was developed to optimize the performance of immunoassays by correlating the opacities of silver spots to the concentration and incubation times of antigens and gold nanoparticles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Development and evaluation of realistic microbioassays in freely suspended droplets on a chip

Biomicrofluidics, 1(1).

By: V. Rastogi n & O. Velev n

Contributors: V. Rastogi n & O. Velev n

TL;DR: A novel technique for biomolecular detection in microliter droplets floating on the surface of high density oil is presented, which could allow for development of efficient immunoassays on a chip requiring even smaller sample volumes. (via Semantic Scholar)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2007 article

Engineered deposition of coatings from nano- and micro-particles: A brief review of convective assembly at high volume fraction

Prevo, B. G., Kuncicky, D. M., & Velev, O. D. (2007, December 1). COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Vol. 311, pp. 2–10.

By: B. Prevo n, D. Kuncicky n & O. Velev n

Contributors: B. Prevo n, D. Kuncicky n & O. Velev n

author keywords: colloidal crystals; convective assembly; nanoparticle coatings; antireflective coatings; SERS
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Fabrication of magnetically-functionalized lens- and donut-shaped microparticles by a surface-formation technique

Physical Chemistry Chemical Physics, 9(48), 6300–6303.

By: H. Wege n, A. Dyab*, O. Velev n & V. Paunov*

Contributors: H. Wege n, A. Dyab*, O. Velev n & V. Paunov*

MeSH headings : Air; Magnetics; Nanoparticles / chemistry; Nanotechnology / methods; Optics and Photonics; Paraffin / chemistry; Particle Size; Polymers / chemical synthesis; Polymers / chemistry; Solutions / chemistry; Surface Properties; Surface-Active Agents / chemistry; Temperature; Water / chemistry
TL;DR: A simple method for the preparation of magnetically-functionalized lens-like and donut-shaped polymeric microparticles is reported, based on spreading a magnetite-doped paraffin-polymer solution at the air/water interface in the presence of an external magnetic field. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: NC State University Libraries, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Physicochemical variables affecting the rheology and microstructure of rennet casein gels

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 55(7), 2688–2697.

By: Q. Zhong n, C. Daubert n & O. Velev n

Contributors: Q. Zhong n, C. Daubert n & O. Velev n

author keywords: processed cheese; rennet casein; gelation; pH; cooling rate
MeSH headings : Caseins / chemistry; Chemical Phenomena; Chemistry, Physical; Chymosin / chemistry; Gels / chemistry; Hydrogen-Ion Concentration; Microscopy, Confocal; Rheology; Thermodynamics
TL;DR: The analysis of casein interactions suggests that the cooling rate affected the casein floc size only when repulsive interactions enabled a slow flocculation comparable with temperature change rates during cooling. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Polyelectrolyte diode: Nonlinear current response of a junction between aqueous ionic gels

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 129(35), 10801–10806.

By: O. Cayre n, S. Chang n & O. Velev n

Contributors: O. Cayre n, T. Suk n & O. Velev n

TL;DR: It is demonstrated that a fixed junction between two aqueous gels containing oppositely charged polyelectrolytes could rectify electric current and had good long-term stability in both DC and AC conduction modes. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Remotely powered distributed microfluidic pumps and mixers based on miniature diodes

LAB ON A CHIP, 8(1), 117–124.

By: S. Chang n, E. Beaumont*, D. Petsev* & O. Velev n

Contributors: S. Chang n, E. Beaumont*, D. Petsev* & O. Velev n

MeSH headings : Fluorescence; Hydrogen-Ion Concentration; Kinetics; Microelectrodes; Microfluidics / instrumentation; Microfluidics / methods; Semiconductors
TL;DR: New principles of microfluidic pumping and mixing by electronic components integrated into a microfluidity chip and the transverse flow driven by the localized electroosmotic flux between diodes oriented oppositely on the microchannel is demonstrated. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Remotely powered self-propelling particles and micropumps based on miniature diodes

NATURE MATERIALS, 6(3), 235–240.

By: S. Chang n, V. Paunov*, D. Petsev* & O. Velev n

Contributors: S. Chang n, V. Paunov*, D. Petsev* & O. Velev n

MeSH headings : Electrodes; Electromagnetic Fields; Microfluidics / instrumentation; Microfluidics / methods; Miniaturization / instrumentation; Miniaturization / methods; Motion; Semiconductors; Static Electricity
TL;DR: It is shown that various types of miniature semiconductor diodes floating in water act as self-propelling particles when powered by an external alternating electric field. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 book

Stabilization of Thin Films, Foams, Emulsions and Bifluid Gels with Surface-Active Solid Particles

In Colloid Stability and Application in Pharmacy (Vol. 3, pp. 277–306).

By: K. Velikov* & O. Velev n

Contributors: K. Velikov* & O. Velev n

Source: ORCID
Added: March 21, 2019

2007 journal article

Surface-guided templating of particle assemblies inside drying sessile droplets

LANGMUIR, 24(4), 1371–1380.

By: D. Kuncicky n & O. Velev n

Contributors: D. Kuncicky n & O. Velev n

MeSH headings : Air; Colloids / chemistry; Desiccation / methods; Diffusion; Electrolytes / chemistry; Gold / chemistry; Kinetics; Microscopy, Electron, Scanning; Microspheres; Nanostructures / chemistry; Nanostructures / ultrastructure; Particle Size; Surface Properties; Water / chemistry
TL;DR: The kinetics of drying were examined by measurements of droplet profiles, and it was found that the rate matched diffusion-limited evaporation well and the shape of the droplets and of the resulting assemblies was correlated to the dynamics of the receding contact line. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Two-dimensional nanoparticle arrays derived from ferritin monolayers

LANGMUIR, 23(10), 5498–5504.

By: Z. Yuan n, D. Petsev n, B. Prevo n, O. Velev n & P. Atanassov n

Contributors: Z. Yuan n, D. Petsev n, B. Prevo n, O. Velev n & P. Atanassov n

MeSH headings : Ferric Compounds / chemistry; Ferritins / chemistry; Microarray Analysis; Nanoparticles / chemistry
TL;DR: This article is the first report on combining convective self-assembly of proteins with sol-gel techniques of oxide film formation, and is technologically feasible and scalable to make coatings of encapsulated ordered magnetic clusters tens of cm(2) or larger in size. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2006 journal article

Assembly and characterization of colloid-based antireflective coatings on multicrystalline silicon solar cells

JOURNAL OF MATERIALS CHEMISTRY, 17(8), 791–799.

By: B. Prevo n, E. Hon n & O. Velev n

Contributors: B. Prevo n, E. Hon n & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2006 journal article

Emulsion-based synthesis of reversibly swellable, magnetic nanoparticle-embedded polymer microcapsules

CHEMISTRY OF MATERIALS, 18(14), 3308–3313.

Contributors: H. Koo n, S. Chang n, W. Choi n, J. Park n, D. Kim n & O. Velev n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2006 book

Novel materials derived from particles assembled on liquid surfaces

In Colloidal Particles at Liquid Interfaces (pp. 225–297).

By: K. Velikov* & O. Velev n

Contributors: K. Velikov* & O. Velev n

Source: ORCID
Added: March 21, 2019

2006 journal article

On-chip micromanipulation and assembly of colloidal particles by electric fields

Soft Matter, 2(9), 738–750.

By: O. Velev n & K. Bhatt n

Contributors: O. Velev n & K. Bhatt n

TL;DR: How dielectrophoresis and AC electrokinetics can be used in droplet-based microfluidic chips, biosensors, and devices for collection of particles from diluted suspensions is discussed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: ORCID, NC State University Libraries
Added: March 21, 2019

2006 review

On-chip micromanipulation and assembly of colloidal particles by electric fields

[Review of ]. Soft Matter, 2(9), 738–750.

By: O. Velev & K. Bhatt

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Rapid deposition and long-range alignment of nanocoatings and arrays of electrically conductive wires from tobacco mosaic virus

SMALL, 2(12), 1462–1466.

By: D. Kuncicky n, R. Naik* & O. Velev n

Contributors: D. Kuncicky n, R. Naik* & O. Velev n

author keywords: fibers; microwires; nanocoatings; templates; viruses
MeSH headings : Electric Conductivity; Gold; Microscopy, Electron, Scanning; Nanowires / chemistry; Nanowires / ultrastructure; Silver; Spectrophotometry, Ultraviolet; Tobacco Mosaic Virus / chemistry; Tobacco Mosaic Virus / ultrastructure
TL;DR: A versatile technique for rapidly assembling large-scale nanocoatings and ordered fibers from tobacco mosaic virus and converting them into electrically functional structures is reported, which uses an alternative flow assembly technique for organizing and aligning TMV into fibers and wires on surfaces. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2006 journal article

Self-assembly of unusual nanoparticle crystals

Science, 312(5772), 376–377.

By: O. Velev n

Contributors: O. Velev n

Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2006 journal article

Sessile droplet templating of miniature porous hemispheres from colloid crystals

CHEMISTRY OF MATERIALS, 19(2), 141–143.

By: D. Kuncicky n, K. Bose n, K. Costa n & O. Velev n

Contributors: D. Kuncicky n, K. Bose n, K. Costa n & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 journal article

An AC electrokinetic technique for collection and concentration of particles and cells on patterned electrodes

LANGMUIR, 21(14), 6603–6612.

By: K. Bhatt n, S. Grego n & O. Velev n

Contributors: K. Bhatt n, S. Grego n & O. Velev n

TL;DR: An electrohydrodynamic effect arising from the application of alternating electric fields to patterned electrode surfaces is reported and three-dimensional microfluidic pumping and transport by the use of two-dimensional patterns is demonstrated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 book

Assembly and application of carbon nanotube fibrils with controlled and variable lengths by dielectrophoresis

In Clusters and Nano-Assemblies: Physical and Biological Systems: Richmond, Virginia, U.S.A., 10-13 November, 2003 (pp. 193–198).

By: J. Tang*, G. Yang*, J. Zhang*, H. Geng*, B. Gao*, L. Qin*, O. Zhou*, O. Velev n

Contributors: J. Tang*, G. Yang*, J. Zhang*, H. Geng*, B. Gao*, L. Qin*, O. Zhou*, O. Velev n

Source: ORCID
Added: March 21, 2019

2005 journal article

Controlled assembly of SERS substrates templated by colloidal crystal films

JOURNAL OF MATERIALS CHEMISTRY, 16(13), 1207–1211.

By: D. Kuncicky n, B. Prevo n & O. Velev n

Contributors: D. Kuncicky n, B. Prevo n & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 conference paper

Controlled deposition and modification of antireflective coatings from silica nanoparticles

AIChE Annual Meeting Conference Proceedings, 2005. http://www.scopus.com/inward/record.url?eid=2-s2.0-33646755458&partnerID=MN8TOARS

By: B. Prevo, Y. Hwang, J. McClain, R. Carbonell & O. Velev

Contributors: B. Prevo, Y. Hwang, J. McClain, R. Carbonell & O. Velev

Source: ORCID
Added: March 21, 2019

2005 conference paper

Controlled dielectrophoretic assembly of bio-inorganic composite materials using live cells and functionalized particles

AIChE Annual Meeting, Conference Proceedings, 14245–14248. http://www.scopus.com/inward/record.url?eid=2-s2.0-33645634751&partnerID=MN8TOARS

By: S. Gupta, R. Alargova, P. Kilpatrick & O. Velev

Contributors: S. Gupta, R. Alargova, P. Kilpatrick & O. Velev

Source: ORCID
Added: March 21, 2019

2005 journal article

Convective assembly of antireflective silica coatings with controlled thickness and refractive index

CHEMISTRY OF MATERIALS, 17(14), 3642–3651.

By: B. Prevo n, Y. Hwang n & O. Velev n

Contributors: B. Prevo n, Y. Hwang n & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 conference paper

Designing silver-enhnaced nanoparticle based immunoassays for antigen/antibody detection

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-33645648355&partnerID=MN8TOARS

By: S. Gupta, S. Huda, O. Velev & P. Kilpatrick

Contributors: S. Gupta, S. Huda, O. Velev & P. Kilpatrick

Source: ORCID
Added: March 21, 2019

2005 journal article

Evaporation-induced particle microseparations inside droplets floating on a chip

LANGMUIR, 22(4), 1459–1468.

By: S. Chang n & O. Velev n

Contributors: S. Chang n & O. Velev n

MeSH headings : Colloids / chemistry; Hydrocarbons, Fluorinated / chemistry; Microchip Analytical Procedures; Microfluidics; Oils / chemistry; Particle Size; Surface Properties
TL;DR: Experimental results and numerical simulations show that this microsepration occurs as a result of a series of processes driven by mass and heat transfer, and can be used for on-chip synthesis of advanced particles and innovative microbioassays. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 conference paper

Fabrication of novel types of colloidosome microcapsules for drug delivery applications

Materials Research Society Symposium Proceedings, 845, 279–283. http://www.scopus.com/inward/record.url?eid=2-s2.0-20344390030&partnerID=MN8TOARS

By: V. Paunov, P. Noble, O. Cayre, R. Alargova & O. Velev

Contributors: V. Paunov, P. Noble, O. Cayre, R. Alargova & O. Velev

Source: ORCID
Added: March 21, 2019

2005 journal article

Formation of polymer microrods in shear flow by emulsification - Solvent attrition mechanism

LANGMUIR, 22(2), 765–774.

By: R. Alargova n, V. Paunov n & O. Velev n

Contributors: R. Alargova n, V. Paunov n & O. Velev n

MeSH headings : Emulsions; Microscopy, Electron, Scanning; Molecular Conformation; Nanotechnology / methods; Particle Size; Polymers / chemistry; Shear Strength; Solubility; Solutions / chemistry; Solvents / chemistry; Stress, Mechanical; Viscosity
TL;DR: A systematic study of a droplet shearing process for the formation of polymer rods with micrometer or submicrometer diameter and a length of up to tens of micrometers, based on emulsification of a polymer solution under shear, combined with solvent attrition in the surrounding organic medium. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 conference paper

Graduate and undergraduate teaching of colloid science and nanoscale engineering - Combining fundamentals with emerging technologies

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-33645646847&partnerID=MN8TOARS

By: O. Velev

Contributors: O. Velev

Source: ORCID
Added: March 21, 2019

2005 journal article

Ordered silicon nanocavity arrays in surface-assisted desorption/ionization mass spectrometry

ANALYTICAL CHEMISTRY, 77(4), 1088–1095.

By: N. Finkel n, B. Prevo n, O. Velev n & L. He n

Contributors: N. Finkel n, B. Prevo n, O. Velev n & L. He n

MeSH headings : Arabidopsis / chemistry; Arabidopsis / metabolism; Nanotubes; Plant Roots / chemistry; Silicon; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods
TL;DR: A simple method to generate ordered nanocavity arrays on a Si wafer and use it in surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS), which demonstrated that the in-plane width and out-of-plane depth of the cavities were adjustable by varying etching times, and the intercavity spacing was controllable by varying the number of particle layers deposited. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 journal article

Role of the micro- and nanostructure in the performance of surface-enhanced Raman scattering substrates assembled from gold nanoparticles

APPLIED SPECTROSCOPY, 59(4), 401–409.

By: D. Kuncicky n, S. Christesen n & O. Velev n

Contributors: D. Kuncicky n, S. Christesen n & O. Velev n

author keywords: surface-enhanced Raman spectroscopy; colloidal crystal templating; structured gold films; cyanide detection; nanoparticles
MeSH headings : Adsorption; Crystallization / methods; Gold / analysis; Gold / chemistry; Hydrogen-Ion Concentration; Materials Testing / methods; Nanostructures / analysis; Nanostructures / chemistry; Nanostructures / ultrastructure; Sodium Cyanide / analysis; Spectrum Analysis, Raman / methods
TL;DR: The results make possible the efficient controlled fabrication of stable, reproducible, and highly active substrates for SERS based chemical sensors with continuous sampling. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 6, 2018

2005 conference paper

Self-propelling semiconductor devices demonstrate new electroosmotic motility principles

AIChE Annual Meeting, Conference Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-33645575757&partnerID=MN8TOARS

By: S. Chang, O. Velev & V. Paunov

Contributors: S. Chang, O. Velev & V. Paunov

Source: ORCID
Added: March 21, 2019

2004 journal article

Anisotropic particle synthesis in dielectrophoretically controlled microdroplet reactors

NATURE MATERIALS, 4(1), 98–102.

By: . Millman n, K. Bhatt n, B. Prevo n & O. Velev n

Contributors: J. Millman n, K. Bhatt n, B. Prevo n & O. Velev n

MeSH headings : Anisotropy; Microfluidics / methods; Nanostructures / chemistry; Polymers / chemical synthesis; Polymers / chemistry
TL;DR: Elect electrically controlled chips can be used for the synthesis and manipulation of new types of particles with advanced structure, based on a technique that allows freely suspended droplets and particles to be entrapped and transported using electric fields. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Controlled, rapid deposition of structured coatings from micro- and nanoparticle suspensions

LANGMUIR, 20(6), 2099–2107.

By: B. Prevo n & O. Velev n

Contributors: B. Prevo n & O. Velev n

TL;DR: The objective of the study was to develop the operational basis for rapid and controlled deposition of crystal coatings from particles of a wide size range by dragging with constant velocity a small volume of liquid confined in a meniscus between two plates. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Cooling effects on a model rennet casein gel system: Part II. Permeability and microscopy

LANGMUIR, 20(18), 7406–7411.

By: Q. Zhong n, C. Daubert n & O. Velev n

Contributors: Q. Zhong n, C. Daubert n & O. Velev n

TL;DR: This study showed the importance of controlling floc numbers to modulate the strength of a gel, and cooling rates provide an approach of modulating functional properties when the chemical composition of a system is fixed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Cooling effects on a model rennet casein gel system: part I. Rheological characterization

LANGMUIR, 20(18), 7399–7405.

By: Q. Zhong n, C. Daubert n & O. Velev n

Contributors: Q. Zhong n, C. Daubert n & O. Velev n

TL;DR: Controlling cooling schemes thus provides an approach for manipulating casein gelation and the microstructure for a system of fixed chemical compositions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 conference paper

Engineering of SERS substrate structure: Role of micro- and nanoporosity

Proceedings of SPIE - The International Society for Optical Engineering, 5585, 33–45.

By: D. Kuncicky n, S. Christesen* & O. Velev n

Contributors: D. Kuncicky n, S. Christesen* & O. Velev n

author keywords: surface-enhanced Raman spectroscopy; colloidal crystal templating; structured gold films; cyanide detection; nanoparticles
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

2004 journal article

Fabrication and Study of Simple and Robust Microfluidic Devices

Pharmaceutical Engineering, 24(2), 98–110. http://www.scopus.com/inward/record.url?eid=2-s2.0-1842555359&partnerID=MN8TOARS

By: R. Hill, J. Millman & O. Velev

Contributors: R. Hill, J. Millman & O. Velev

Source: ORCID
Added: March 21, 2019

2004 journal article

Fabrication of "hairy" colloidosomes with shells of polymeric microrods

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 126(26), 8092–8093.

By: P. Noble n, O. Cayre n, R. Alargova n, O. Velev n & V. Paunov n

Contributors: P. Noble n, O. Cayre n, R. Alargova n, O. Velev n & V. Paunov n

TL;DR: Novel colloidosome microcapsules with aqueous gel cores and integral shells of rodlike polymeric particles have been prepared and characterized and may find applications as vehicles for delivery and controlled release of drugs, cosmetics, and food supplements. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Foam superstabilization by polymer microrods

LANGMUIR, 20(24), 10371–10374.

By: R. Alargova n, D. Warhadpande n, V. Paunov n & O. Velev n

Contributors: R. Alargova n, D. Warhadpande n, V. Paunov n & O. Velev n

TL;DR: It is reported how foams can be stabilized solely with a new class of anisotropic particles, hydrophobic polymer microrods of diameter less than 1 mum and length of a few tens of micrometers, which were extraordinary stable, retaining a constant volume over many days and even surviving drying of most of the free liquid. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Molecular effects of anionic surfactants on lysozyme precipitation and crystallization

Crystal Growth and Design, 5(1), 351–359.

By: O. Velev*, Y. Pan*, E. Kaler* & A. Lenhoff*

Contributors: O. Velev*, Y. Pan*, E. Kaler* & A. Lenhoff*

Source: ORCID
Added: March 21, 2019

2004 conference paper

Preparation of unsymmetrically coated colloid particles by microcontact printing techniques

Materials Research Society Symposium Proceedings, EXS(2), 27–29. http://www.scopus.com/inward/record.url?eid=2-s2.0-23844552416&partnerID=MN8TOARS

By: O. Cayre, V. Paunov & O. Velev

Contributors: O. Cayre, V. Paunov & O. Velev

Source: ORCID
Added: March 21, 2019

2004 journal article

Rapid deposition of gold nanoparticle films with controlled thickness and structure by convective assembly

CHEMISTRY OF MATERIALS, 17(1), 28–35.

By: B. Prevo n, J. Fuller n & O. Velev n

Contributors: B. Prevo n, J. Fuller III & O. Velev n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Scalable synthesis of a new class of polymer microrods by a liquid - Liquid dispersion technique

ADVANCED MATERIALS, 16(18), 1653-+.

By: R. Alargova n, K. Bhatt n, V. Paunov* & O. Velev*

Contributors: R. Alargova n, K. Bhatt n, V. Paunov* & O. Velev*

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

Two-dimensional crystallization of microspheres by a coplanar AC electric field

LANGMUIR, 20(6), 2108–2116.

By: S. Lumsdon n, E. Kaler n & O. Velev n

Contributors: S. Lumsdon n, E. Kaler n & O. Velev n

TL;DR: The particle-field and particle-particle interactions induced by alternating electric fields can be conveniently used for on-chip assembly of colloidal crystals and a model is proposed involving a combination of dielectrophoresis and induced dipole chaining. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2004 journal article

油膜を利用したラボチップ

Nature Digest, 1(1), 16–16.

By: O. Velev*, B. Prevo & K. Bhatt

Sources: Crossref, NC State University Libraries
Added: September 8, 2020

2003 journal article

Assembly of ID nanostructures into sub-micrometer diameter fibrils with controlled and variable length by dielectrophoresis

ADVANCED MATERIALS, 15(16), 1352-+.

By: J. Tang*, B. Gao*, H. Geng, O. Velev n, L. Qin* & O. Zhou

Contributors: J. Tang*, B. Gao*, H. Geng, O. Velev n, L. Qin* & O. Zhou

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 journal article

Casein precipitation equilibria in the presence of calcium ions and phosphates

COLLOIDS AND SURFACES B-BIOINTERFACES, 29(4), 297–307.

By: C. Guo*, B. Campbell*, K. Chen*, A. Lenhoff* & O. Velev*

Contributors: C. Guo*, B. Campbell*, K. Chen*, A. Lenhoff* & O. Velev*

author keywords: casein; precipitation equilibria; calcium ions
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 journal article

Control and modeling of the dielectrophoretic assembly of on-chip nanoparticle wires

LANGMUIR, 20(2), 467–476.

By: K. Bhatt n & O. Velev n

Contributors: K. Bhatt n & O. Velev n

TL;DR: The experiments show that the wires grow in the direction of highest field intensity, "automatically" making electrical connections to the objects between the electrodes, pointing the way to controlled dielectrophoretic assembly of nanoparticles into on-chip electrical connectors, switches, and networks. (via Semantic Scholar)
UN Sustainable Development Goal Categories
14. Life Below Water (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 conference paper

Controlled assembly of carbon nanotube fibrils by dielectrophoresis

Materials Research Society Symposium - Proceedings, 788, 539–544. http://www.scopus.com/inward/record.url?eid=2-s2.0-2442521313&partnerID=MN8TOARS

By: J. Tang, G. Yang, J. Zhang, H. Geng, B. Gao, O. Velev, L. Qin, O. Zhou

Contributors: J. Tang, G. Yang, J. Zhang, H. Geng, B. Gao, O. Velev, L. Qin, O. Zhou

Source: ORCID
Added: March 21, 2019

2003 conference paper

Dielectrophoretic Assembly of Switehable Two-Dimensional Photonic Crystals with Specific Orientation

Materials Research Society Symposium - Proceedings, 776, 81–87. http://www.scopus.com/inward/record.url?eid=2-s2.0-1542274377&partnerID=MN8TOARS

By: S. Lumsdon, E. Kaler & O. Velev

Contributors: S. Lumsdon, E. Kaler & O. Velev

Source: ORCID
Added: March 21, 2019

2003 journal article

Dielectrophoretic assembly of oriented and switchable two-dimensional photonic crystals

APPLIED PHYSICS LETTERS, 82(6), 949–951.

By: S. Lumsdon*, E. Kaler*, J. Williams* & O. Velev n

Contributors: S. Lumsdon*, E. Kaler*, J. Williams* & O. Velev n

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 journal article

Fabrication of asymmetrically coated colloid particles by microcontact printing techniques

JOURNAL OF MATERIALS CHEMISTRY, 13(10), 2445–2450.

By: O. Cayre*, V. Paunov* & O. Velev n

Contributors: O. Cayre*, V. Paunov* & O. Velev n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 journal article

Fabrication of dipolar colloid particles by microcontact printing

Chemical Communications, 18, 2296–2297.

By: O. Cayre*, V. Paunov* & O. Velev*

Contributors: O. Cayre*, V. Paunov* & O. Velev*

TL;DR: A novel technique for preparation of dipolar colloids particles has been developed which is based on microcontact printing of films of water-insoluble ionic surfactants onto monolayers of colloid particles of opposite surface charge. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

2003 conference paper

Material Research Society Symposium - Prodeeding: Preface

Materials Research Society Symposium - Proceedings, 776. http://www.scopus.com/inward/record.url?eid=2-s2.0-1542364336&partnerID=MN8TOARS

By: O. Velev, T. Bunning, Y. Xia & P. Yang

Contributors: O. Velev, T. Bunning, Y. Xia & P. Yang

Source: ORCID
Added: March 21, 2019

2003 journal article

Mobility of adsorbed proteins studied by fluorescence recovery after photobleaching

Langmuir, 19(9), 3705–3711.

By: Y. Yuan*, O. Velev* & A. Lenhoff*

Contributors: Y. Yuan*, O. Velev* & A. Lenhoff*

Source: ORCID
Added: March 21, 2019

2003 article

On-chip manipulation of free droplets

Velev, O. D., Prevo, B. G., & Bhatt, K. H. (2003, December 4). NATURE, Vol. 426, pp. 515–516.

By: O. Velev n, B. Prevo n & K. Bhatt n

Contributors: O. Velev n, B. Prevo n & K. Bhatt n

MeSH headings : Electrodes; Microchemistry / instrumentation; Microfluidics / instrumentation
TL;DR: A liquid–liquid microfluidic system for manipulating freely suspended microlitre- and nanolitre-sized droplets of water or hydrocarbon, which float on a denser, perfluorinated oil and are driven by an alternating or constant electric field applied by arrays of electrodes below the oil. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2003 book

Unconventional approaches to nanostructures with applications in electronics, photonics, information storage and sensing: Symposium held April 21-25, 2003, San Francisco, California, U.S.A.

Warrendale, PA: Materials Research Society.

By: O. Velev

Source: NC State University Libraries
Added: August 6, 2018

2002 journal article

Assembly of gold nanostructured films templated by colloidal crystals and use in surface-enhanced Raman spectroscopy

Proceedings of SPIE - The International Society for Optical Engineering, 4577, 53–64.

By: P. Tessier*, K. Ong, S. Christesen, A. Lenhoff*, E. Kaler* & O. Velev*

Contributors: P. Tessier*, K. Ong, S. Christesen, A. Lenhoff*, E. Kaler* & O. Velev*

Source: ORCID
Added: March 21, 2019

2002 conference paper

Dielectrophoretic assembly of switchable two-dimensional photonic crystals with specific orientation

American Chemical Society, Polymer Preprints, Division of Polymer Chemistry, 43(1), 21–22. http://www.scopus.com/inward/record.url?eid=2-s2.0-84899709236&partnerID=MN8TOARS

By: S. Lumsdon, J. Williams, E. Kaler & O. Velev

Contributors: S. Lumsdon, J. Williams, E. Kaler & O. Velev

Source: ORCID
Added: March 21, 2019

2002 journal article

Effect of pH and Ca2+-induced associations of soybean proteins

Journal of Agricultural and Food Chemistry, 50(17), 4953–4958.

By: Y. Yuan*, O. Velev*, K. Chen*, B. Campbell*, E. Kaler* & A. Lenhoff*

Contributors: Y. Yuan*, O. Velev*, K. Chen*, B. Campbell*, E. Kaler* & A. Lenhoff*

author keywords: soybean proteins; precipitation; equilibrium; pH; calcium; electric charge
MeSH headings : Calcium / pharmacology; Hydrogen-Ion Concentration; Isoelectric Point; Osmolar Concentration; Solubility; Soybean Proteins / chemistry
TL;DR: An experimental procedure was developed to characterize the solubility of the soybean protein fractions close to the isoelectric point and shows that the 7S fraction is precipitated in a much narrower range of pH values than the 11S fraction. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

2002 journal article

On-line spectroscopic characterization of sodium cyanide with nanostructured gold surface-enhanced Raman spectroscopy substrates

APPLIED SPECTROSCOPY, 56(12), 1524–1530.

By: P. Tessier*, S. Christesen*, K. Ong*, E. Clemente*, A. Lenhoff*, E. Kaler*, O. Velev*

Contributors: P. Tessier*, S. Christesen*, K. Ong*, E. Clemente*, A. Lenhoff*, E. Kaler*, O. Velev*

author keywords: surface-enhanced Raman spectroscopy; structured gold films; cyanide detection; colloidal crystal templating; nanoparticles
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2001 journal article

Dielectrophoretic assembly of electrically functional microwires from nanoparticle suspensions

SCIENCE, 294(5544), 1082–1086.

By: K. Hermanson*, S. Lumsdon*, J. Williams*, E. Kaler* & O. Velev*

Contributors: K. Hermanson*, S. Lumsdon*, J. Williams*, E. Kaler* & O. Velev*

TL;DR: A new class of microwires can be assembled by dielectrophoresis from suspensions of metallic nanoparticles that have good ohmic conductance and automatically form electrical connections to conductive islands or particles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
14. Life Below Water (OpenAlex)
Sources: ORCID, Web Of Science
Added: August 6, 2018

2001 patent

Miniaturized immunosensor assembled from colloidal particles between micropatterned electrodes

Washington, DC: U.S. Patent and Trademark Office.

By: E. Kaler & O. Velev

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

Structured metallic films for optical and spectroscopic applications via colloidal crystal templating

Advanced Materials, 13(6), 396–400.

By: P. Tessier, O. Velev, A. Kalambur, A. Lenhoff, J. Rabolt & E. Kaler

Contributors: P. Tessier, O. Velev, A. Kalambur, A. Lenhoff, J. Rabolt & E. Kaler

Source: ORCID
Added: March 21, 2019

2000 journal article

A class of microstructured particles through colloidal crystallization

Science, 287(5461), 2240–2243.

By: O. Velev*, A. Lenhoff* & E. Kaler*

Contributors: O. Velev*, A. Lenhoff* & E. Kaler*

TL;DR: Microstructured particles were synthesized by growing colloidal crystals in aqueous droplets suspended on fluorinated oil to allow control of particle size and shape from spheres through ellipsoids to toroids by varying the droplet composition. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

2000 journal article

Assembly of gold nanostructured films templated by colloidal crystals and use in surface-enhanced Raman spectroscopy [9]

Journal of the American Chemical Society, 122(39), 9554–9555.

By: P. Tessier*, O. Velev*, A. Kalambur*, J. Rabolt*, A. Lenhoff* & E. Kaler*

Contributors: P. Tessier*, O. Velev*, A. Kalambur*, J. Rabolt*, A. Lenhoff* & E. Kaler*

Source: ORCID
Added: March 21, 2019

2000 journal article

Colloidal crystals as templates for porous materials

Current Opinion in Colloid and Interface Science, 5(1-2), 56–63.

By: O. Velev* & A. Lenhoff*

Contributors: O. Velev* & A. Lenhoff*

author keywords: colloidal crystals; porous materials; templates
Source: ORCID
Added: March 21, 2019

2000 journal article

Structured porous materials via colloidal crystal templating: from inorganic oxides to metals

Advanced Materials, 12(7), 531–534.

By: O. Velev & E. Kaler

Contributors: O. Velev & E. Kaler

Source: ORCID
Added: March 21, 2019

2000 journal article

Surfactant diffusion into lysozyme crystal matrices investigated by quantitative fluorescence microscopy

Journal of Physical Chemistry B, 104(39), 9267–9275. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034300118&partnerID=MN8TOARS

By: O. Velev, E. Kaler & A. Lenhoff

Contributors: O. Velev, E. Kaler & A. Lenhoff

Source: ORCID
Added: March 21, 2019

1999 journal article

A class of porous metallic nanostructures

By: O. Velev*, P. Tessier*, A. Lenhoff* & E. Kaler*

Contributors: O. Velev*, P. Tessier*, A. Lenhoff* & E. Kaler*

Source: ORCID
Added: March 21, 2019

1999 journal article

Electrokinetic behavior in synthatic process of composite particles

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 159(2-3), 359–371.

By: K. Furusawa* & O. Velev*

Contributors: K. Furusawa* & O. Velev*

author keywords: composite particles; heterocoagulates; superparticles; magnetic particles; electrokinetic behavior
Source: ORCID
Added: March 21, 2019

1999 journal article

In situ assembly of colloidal particles into miniaturized biosensors

Langmuir, 15(11), 3693–3698.

By: O. Velev* & E. Kaler*

Contributors: O. Velev* & E. Kaler*

TL;DR: In situ assembly of colloidal particles onto micropatterned electrodes holds promise for creating disposable on-chip arrays of highly sensitive miniature sensors for specific proteins, DNA fragments, or other biomolecules. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

1999 journal article

Photochemical micromachining of lysozyme crystals

Advanced Materials, 11(16), 1345–1349.

By: O. Velev, E. Kaler & A. Lenhoff

Contributors: O. Velev, E. Kaler & A. Lenhoff

Source: ORCID
Added: March 21, 2019

1999 journal article

Why is the osmotic second virial coefficient related to protein crystallization?

Journal of Crystal Growth, 196(2-4), 377–387. http://www.scopus.com/inward/record.url?eid=2-s2.0-0033513738&partnerID=MN8TOARS

By: B. Neal, D. Asthagiri, O. Velev, A. Lenhoff & E. Kaler

Contributors: B. Neal, D. Asthagiri, O. Velev, A. Lenhoff & E. Kaler

Source: ORCID
Added: March 21, 2019

1998 journal article

Direct observation of the dynamics of latex particles confined inside thinning water-air films

Langmuir, 14(5), 1148–1155. http://www.scopus.com/inward/record.url?eid=2-s2.0-0032477986&partnerID=MN8TOARS

By: K. Velikov, F. Durst & O. Velev

Contributors: K. Velikov, F. Durst & O. Velev

Source: ORCID
Added: March 21, 2019

1998 journal article

Effect of calcium ions and environmental conditions on the properties of β-casein stabilized films and emulsions

Langmuir, 14(15), 4122–4130. http://www.scopus.com/inward/record.url?eid=2-s2.0-0032115553&partnerID=MN8TOARS

By: O. Velev, B. Campbell & R. Borwankar

Contributors: O. Velev, B. Campbell & R. Borwankar

Source: ORCID
Added: March 21, 2019

1998 journal article

Microstructured Porous Silica Obtained via Colloidal Crystal Templates

Chemistry of Materials, 10(11), 3597–3602. http://www.scopus.com/inward/record.url?eid=2-s2.0-0001036583&partnerID=MN8TOARS

By: O. Velev, T. Jede, R. Lobo & A. Lenhoff

Contributors: O. Velev, T. Jede, R. Lobo & A. Lenhoff

Source: ORCID
Added: March 21, 2019

1998 journal article

Protein interactions in solution characterized by light and neutron scattering: Comparison of lysozyme and chymotrypsinogen

Biophysical Journal, 75(6), 2682–2697. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031768735&partnerID=MN8TOARS

By: O. Velev, E. Kaler & A. Lenhoff

Contributors: O. Velev, E. Kaler & A. Lenhoff

Source: ORCID
Added: March 21, 2019

1997 journal article

Assembly of latex particles by using emulsion droplets. 3. Reverse (water in oil) system

Langmuir, 13(6), 1856–1859. http://www.scopus.com/inward/record.url?eid=2-s2.0-0001411305&partnerID=MN8TOARS

By: O. Velev & K. Nagayama

Contributors: O. Velev & K. Nagayama

Source: ORCID
Added: March 21, 2019

1997 book

Assembly of protein structures on liposomes by non-specific and specific interactions

In Advances in Biophysics (Vol. 34, pp. 139–157).

By: O. Velev*

Contributors: O. Velev*

MeSH headings : Avidin / chemistry; Bacterial Proteins / chemistry; Biotin / chemistry; Cross-Linking Reagents; Ferritins / chemistry; Ferritins / ultrastructure; Glutaral; Liposomes / chemistry; Microscopy, Electron; Phosphatidylcholines; Proteins / chemistry; Proteins / ultrastructure; Static Electricity; Streptavidin; Surface-Active Agents
TL;DR: To accomplish the assembly process, the liposomes need to design and modify both the specific and non-specific colloid interactions in the system, and the result is liposome heavily coated with a strongly and specifically attached ferritin layer. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

1997 journal article

Effect of the surfactant concentration on the kinetic stability of thin foam and emulsion films

Journal of the Chemical Society - Faraday Transactions, 93(11), 2069–2075. http://www.scopus.com/inward/record.url?eid=2-s2.0-33748740478&partnerID=MN8TOARS

By: K. Velikov, O. Velev, K. Marinova & G. Constantinides

Contributors: K. Velikov, O. Velev, K. Marinova & G. Constantinides

Source: ORCID
Added: March 21, 2019

1997 journal article

Porous silica via colloidal crystallization [9]

Nature, 389(6650), 447–448. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030769045&partnerID=MN8TOARS

By: O. Velev, T. Jede, R. Lobo & A. Lenhoff

Contributors: O. Velev, T. Jede, R. Lobo & A. Lenhoff

Source: ORCID
Added: March 21, 2019

1997 journal article

Stability of emulsions under static and dynamic conditions

Journal of Dispersion Science and Technology, 18(6-7), 625–645. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031224199&partnerID=MN8TOARS

By: O. Velev

Contributors: O. Velev

Source: ORCID
Added: March 21, 2019

1997 journal article

The role of additives for the behaviour of thin emulsion films stabilized by proteins

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 123-124, 155–167.

By: K. Marinova*, T. Gurkov*, O. Velev*, I. Ivanov*, B. Campbell* & R. Borwankar*

Contributors: K. Marinova*, T. Gurkov*, O. Velev*, I. Ivanov*, B. Campbell* & R. Borwankar*

author keywords: additives; emulsion films; proteins; specific interactions
Source: ORCID
Added: March 21, 2019

1996 journal article

Assembly of latex particles by using emulsion droplets as templates. 1. Microstructured hollow spheres

Langmuir, 12(10), 2374–2384. http://www.scopus.com/inward/record.url?eid=2-s2.0-0000810478&partnerID=MN8TOARS

By: O. Velev, K. Furusawa & K. Nagayama

Contributors: O. Velev, K. Furusawa & K. Nagayama

Source: ORCID
Added: March 21, 2019

1996 journal article

Assembly of latex particles by using emulsion droplets as templates. 2. Ball-like and composite aggregates

Langmuir, 12(10), 2385–2391. http://www.scopus.com/inward/record.url?eid=2-s2.0-4244024342&partnerID=MN8TOARS

By: O. Velev, K. Furusawa & K. Nagayama

Contributors: O. Velev, K. Furusawa & K. Nagayama

Source: ORCID
Added: March 21, 2019

1996 journal article

Charging of oil-water interfaces due to spontaneous adsorption of hydroxyl ions

Langmuir, 12(8), 2045–2051. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030129467&partnerID=MN8TOARS

By: K. Marinova, R. Alargova, N. Denkov, O. Velev, D. Petsev, I. Ivanov, R. Borwankar

Contributors: K. Marinova, R. Alargova, N. Denkov, O. Velev, D. Petsev, I. Ivanov, R. Borwankar

Source: ORCID
Added: March 21, 2019

1996 journal article

Effect of the surface expansion and wettability of the capillary on the dynamic surface tension measured by the maximum bubble pressure method

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 113(1-2), 117–126.

By: T. Horozov*, C. Dushkin*, K. Danov*, L. Arnaudov*, O. Velev*, A. Mehreteab*, G. Broze

Contributors: T. Horozov*, C. Dushkin*, K. Danov*, L. Arnaudov*, O. Velev*, A. Mehreteab*, G. Broze

author keywords: bubble growth; dynamic surface tension; hydrophilic capillary; hydrophobic capillary; maximum bubble pressure method; surface expansion; wettability
Source: ORCID
Added: March 21, 2019

1995 journal article

Abnormal thickness and stability of nonequilibrium liquid films

Physical Review Letters, 75(2), 264–267.

By: O. Velev*, T. Gurkov*, I. Ivanov* & R. Borwankar*

Contributors: O. Velev*, T. Gurkov*, I. Ivanov* & R. Borwankar*

TL;DR: Thick and very stable aqueous films between oil phases are obtained in systems where surfactant diffuses across the interfaces, towards the film. (via Semantic Scholar)
Source: ORCID
Added: March 21, 2019

1995 journal article

Investigation of Thin Liquid Films of Small Diameters and High Capillary Pressures by a Miniaturized Cell

Journal of Colloid And Interface Science, 175(1), 68–76.

By: O. Velev*, G. Constantinides*, D. Avraam*, A. Payatakes* & R. Borwankar*

Contributors: O. Velev*, G. Constantinides*, D. Avraam*, A. Payatakes* & R. Borwankar*

author keywords: THIN LIQUID FILMS; CAPILLARY PRESSURE; DIMPLE; NONIONIC SURFACTANTS; PROTEIN-STABILIZED EMULSIONS
Source: ORCID
Added: March 21, 2019

1995 journal article

Measurement of the Drag Coefficient of Spherical Particles Attached to Fluid Interfaces

Journal of Colloid And Interface Science, 172(1), 147–154.

By: J. Petkov*, N. Denkov*, K. Danov*, O. Velev*, R. Aust* & F. Durst*

Contributors: J. Petkov*, N. Denkov*, K. Danov*, O. Velev*, R. Aust* & F. Durst*

author keywords: DRAG COEFFICIENT; FLOATING PARTICLE; CAPILLARY FORCE; 3-PHASE CONTACT ANGLE; SURFACE DIFFUSION
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

1994 journal article

Capillary image forces. II. Experiment

Journal of Colloid and Interface Science, 167(1), 66–73.

Source: ORCID
Added: March 21, 2019

1994 journal article

Experimental investigations on model emulsion systems stabilized with non-ionic surfactant blends

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 83(1), 43–55.

By: O. Velev*, T. Gurkov*, S. Chakarova*, B. Dimitrova*, I. Ivanov* & R. Borwankar*

Contributors: O. Velev*, T. Gurkov*, S. Chakarova*, B. Dimitrova*, I. Ivanov* & R. Borwankar*

author keywords: EMULSIFIER BLENDS; EMULSION STABILITY; MIXED SURFACTANTS; NONIONIC SURFACTANTS; THIN LIQUID FILMS
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

1994 journal article

Formation of two-dimensional colloid crystals in liquid films under the action of capillary forces

Journal of Physics: Condensed Matter, 6(23A).

Source: ORCID
Added: March 21, 2019

1994 journal article

Formation of two-dimensional structures from colloidal particles on fluorinated oil substrate

Journal of the Chemical Society, Faraday Transactions, 90(14), 2077–2083.

By: G. Lazarov, N. Denkov, O. Velev*, P. Kralchevsky & K. Nagayama

Contributors: G. Lazarov, N. Denkov, O. Velev*, P. Kralchevsky & K. Nagayama

Source: ORCID
Added: March 21, 2019

1993 journal article

Direct measurement of lateral capillary forces

Langmuir, 9(12), 3702–3709. http://www.scopus.com/inward/record.url?eid=2-s2.0-0027877959&partnerID=MN8TOARS

By: O. Velev, N. Denkov, V. Paunov, P. Kralchevsky & K. Nagayama

Contributors: O. Velev, N. Denkov, V. Paunov, P. Kralchevsky & K. Nagayama

Source: ORCID
Added: March 21, 2019

1993 book

Mechanism of formation of two-dimensional crystals from latex particles on substrata

In Progress in Colloid & Polymer Science (Vol. 93, pp. 366–367). http://www.scopus.com/inward/record.url?eid=2-s2.0-0027735706&partnerID=MN8TOARS

By: O. Velev, N. Denkov, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Contributors: O. Velev, N. Denkov, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Source: ORCID
Added: March 21, 2019

1993 journal article

Spontaneous Cyclic Dimpling in Emulsion Films Due to Surfactant Mass Transfer between the Phases

Journal of Colloid And Interface Science, 159(2), 497–501.

By: O. Velev*, T. Gurkov* & R. Borwankar*

Contributors: O. Velev*, T. Gurkov* & R. Borwankar*

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

1993 journal article

Two-dimensional crystallization [6]

http://www.scopus.com/inward/record.url?eid=2-s2.0-33745795670&partnerID=MN8TOARS

By: N. Denkov, O. Velev, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Contributors: N. Denkov, O. Velev, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Source: ORCID
Added: March 21, 2019

1992 journal article

Interfacial properties and emulsion stability in fluorinated oil-non-fluorinated oil-surfactant(s) systems

Colloids and Surfaces, 67(C), 81–93.

By: M. Morita, M. Matsumoto, S. Usui*, T. Abe*, N. Denkov*, O. Velev*, I. Ivanov*

Contributors: M. Morita, M. Matsumoto, S. Usui*, T. Abe*, N. Denkov*, O. Velev*, I. Ivanov*

author keywords: FLUORINATED SURFACTANTS; INTERFACIAL TENSION; OIL OIL INTERFACES; OIL-IN-OIL EMULSIONS
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: ORCID
Added: March 21, 2019

1992 journal article

Mechanism of formation of two-dimensional crystals from latex particles on substrates

Langmuir, 8(12), 3183–3190. http://www.scopus.com/inward/record.url?eid=2-s2.0-0027005198&partnerID=MN8TOARS

By: N. Denkov, O. Velev, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Contributors: N. Denkov, O. Velev, P. Kralchevsky, I. Ivanov, H. Yoshimura & K. Nagayama

Source: ORCID
Added: March 21, 2019

journal article

Stability and viscoelasticity of magneto-pickering foams

Blanco, E., Lam, S., Smoukov, S. K., Velikov, K. P., Khan, S. A., & Velev, O. D. Langmuir, 29(32), 10019–10027.

By: E. Blanco, S. Lam, S. Smoukov, K. Velikov, S. Khan & O. Velev

Source: NC State University Libraries
Added: August 6, 2018

Employment

Updated: June 24th, 2019 17:30

North Carolina State University Raleigh, NC, US
S. Frank and Doris Culberson Distinguished Professor Chemical and Biomolecular Engineering

Citation Index includes data from a number of different sources. If you have questions about the sources of data in the Citation Index or need a set of data which is free to re-distribute, please contact us.

Certain data included herein are derived from the Web of Science© and InCites© (2024) of Clarivate Analytics. All rights reserved. You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.