Works (79)

Updated: October 23rd, 2023 08:15

2023 article

Correlative spectroscopic investigations of the mechanisms of inhomogeneity in CVD-grown monolayer WS<sub>2</sub>

Su, L., Yu, Y., Cao, L., & Zhang, Y. (2023, September 21). SCIENCE CHINA-MATERIALS.

By: L. Su*, Y. Yu n, L. Cao n & Y. Zhang*

author keywords: tungsten disulfide; Raman spectroscopy; photoluminescence; chemical vapor deposition
Source: Web Of Science
Added: October 16, 2023

2023 article

Distinct Contact Scaling Effects in MoS2 Transistors Revealed with Asymmetrical Contact Measurements

Cheng, Z., Backman, J., Zhang, H., Abuzaid, H., Li, G., Yu, Y., … Franklin, A. D. (2023, April 5). ADVANCED MATERIALS.

By: Z. Cheng*, J. Backman*, H. Zhang*, H. Abuzaid*, G. Li n, Y. Yu n, L. Cao n, A. Davydov* ...

author keywords: contact scaling; current crowding; negative differential resistance; transfer length; two-dimensional field-effect transistors
Source: Web Of Science
Added: May 1, 2023

2023 article

Phase Diagram of High-Temperature Electron-Hole Quantum Droplet in Two-Dimensional Semiconductors

Yu, Y., Li, G., Xu, Y., Hu, C., Liu, X., & Cao, L. (2023, August 4). ACS NANO.

By: Y. Yu n, G. Li n, Y. Xu*, C. Hu*, X. Liu* & L. Cao n

author keywords: electron-holeliquid; exciton Mott transition; exciton phase diagram; two-dimensional semiconductors; high temperature
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 14, 2023

2022 journal article

Excitons in strained and suspended monolayer WSe2

2D MATERIALS, 9(1).

By: B. Aslan*, C. Yule*, Y. Yu n, Y. Lee*, T. Heinz*, L. Cao n, M. Brongersma*

author keywords: WSe2; exciton binding energy; dielectric screening; suspended monolayer; bilayer
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: November 1, 2021

2021 journal article

Unanticipated Polarity Shift in Edge-Contacted Tungsten-Based 2D Transition Metal Dichalcogenide Transistors

IEEE ELECTRON DEVICE LETTERS, 42(10), 1563–1566.

author keywords: Metals; Image edge detection; Performance evaluation; Field effect transistors; Substrates; Ion beams; Contacts; Edge contacts; transition metal dichalcogenide (TMD); field-effect transistor (FET); carrier injection; ion beam
Source: Web Of Science
Added: October 12, 2021

2020 journal article

Emergent quantum materials

MRS BULLETIN, 45(5), 340–347.

By: C. Lau*, F. Xia* & L. Cao n

UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Source: Web Of Science
Added: May 26, 2020

2020 journal article

Engineering Substrate Interaction To Improve Hydrogen Evolution Catalysis of Monolayer MoS2 Films beyond Pt

ACS NANO, 14(2), 1707–1714.

author keywords: MoS2; hydrogen evolution reaction; water splitting; 2D materials; substrate effects
TL;DR: A strategy to enable the catalytic activity of monolayer MoS2 films even better than that of Pt via engineering the interaction of the monolayers with supporting substrates and using substrates that can provide n-doping toMoS2 and forms low interfacial tunneling barriers with MoS3. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: March 23, 2020

2020 journal article

Gate-tunable cross-plane heat dissipation in single-layer transition metal dichalcogenides

PHYSICAL REVIEW RESEARCH, 2(3).

Source: Web Of Science
Added: January 25, 2021

2020 journal article

Giant enhancement of exciton diffusivity in two-dimensional semiconductors

SCIENCE ADVANCES, 6(51).

By: Y. Yu n, Y. Yu n, G. Li n, A. Puretzky*, D. Geohegan* & L. Cao n

Source: Web Of Science
Added: January 11, 2021

2020 journal article

In-Plane and Interfacial Thermal Conduction of Two-Dimensional Transition-Metal Dichalcogenides

PHYSICAL REVIEW APPLIED, 13(3).

By: Y. Yu n, T. Minhaj n, L. Huang n, Y. Yu & L. Cao n

Source: Web Of Science
Added: April 20, 2020

2020 journal article

Low-loss composite photonic platform based on 2D semiconductor monolayers

NATURE PHOTONICS, 14(4), 256-+.

By: I. Datta*, S. Chae*, G. Bhatt*, M. Tadayon*, B. Li*, Y. Yu n, C. Park*, J. Park* ...

Source: Web Of Science
Added: March 16, 2020

2020 journal article

Multi-mode Organic Light-Emitting Diode to Suppress the Viewing Angle Dependence

ACS APPLIED MATERIALS & INTERFACES, 12(28), 31667–31676.

By: C. Dong n, X. Fu n, L. Cao*, S. Amoah n, K. Gundogdu n, J. Li*, F. So n

author keywords: white OLED; top-emitting OLED; cavity effect; multiple cavity modes; angular color shift
TL;DR: A multi-mode OLED structure having dual-dielectric spacer layers, which completely eliminates the intrinsic cavity effect caused by the top and bottom boundaries respectively and provides freedom for the organic layer thickness. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 10, 2020

2019 journal article

Convergent ion beam alteration of 2D materials and metal-2D interfaces

2D MATERIALS, 6(3).

By: Z. Cheng*, H. Abuzaid*, Y. Yu n, F. Zhang*, Y. Li*, S. Noyce*, N. Williams*, Y. Lin* ...

author keywords: MoS2; ion beam; metal 2D interface; contact engineering
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: June 24, 2019

2019 journal article

Dense Electron–Hole Plasma Formation and Ultralong Charge Lifetime in Monolayer MoS2 via Material Tuning

Nano Letters, 19(2), 1104–1111.

By: A. Bataller n, R. Younts n, A. Rustagi n, Y. Yu n, H. Ardekani n, A. Kemper n, L. Cao n, K. Gundogdu n

author keywords: Two-dimensional materials; MoS2; transition metal dichalcogenides; dense electron-hole plasma; bandgap renormalization; direct to indirect bandgap transition
TL;DR: This work studied the formation and dissipation of EHP in monolayer MoS2, finding a stable dense plasma state that is sustained with modest optical photoexcitation and paving the way for novel applications based on dense plasma states in two-dimensional semiconductors. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: February 20, 2019

2019 journal article

Immunity to Contact Scaling in MoS2 Transistors Using in Situ Edge Contacts

NANO LETTERS, 19(8), 5077–5085.

author keywords: 2D materials; in situ edge contacts; contact scaling; splitting 2D crystals; metal-2D interfaces
TL;DR: It is shown that clean edge contacts to 2D MoS2 can provide immunity to the contact-scaling problem, with performance that is independent of contact length down to the 20 nm regime. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: Web Of Science
Added: September 3, 2019

2019 journal article

Recording interfacial currents on the subnanometer length and femtosecond time scale by terahertz emission

SCIENCE ADVANCES, 5(2).

TL;DR: This work presents quantitative measurements of interfacial currents on the subnanometer length and femtosecond time scale by recording the emitted terahertz radiation following ultrafast laser excitation to apply to interlayer charge transfer in heterostructures of two transition metal dichalcogenide monolayers less than 0.7 nm apart. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: March 18, 2019

2019 journal article

Room-Temperature Electron-Hole Liquid in Monolayer MoS2

ACS NANO, 13(9), 10351–10358.

author keywords: electron-hole plasma; exciton; phase transition; molybdenum disulfide; transitional metal dichalcogenides; TMDC
TL;DR: This work demonstrates the potential for the liquid-like state of charge excitations to be a useful platform for the studies of macroscopic quantum phenomena and the development of optoelectronic devices. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: October 14, 2019

2019 journal article

Surface-enhanced Raman scattering of monolayer transition metal dichalcogenides on Ag nanorod arrays

OPTICS LETTERS, 44(22), 5493–5496.

By: L. Su*, L. Bradley*, Y. Yu n, Y. Yu, L. Cao n, Y. Zhao*, Y. Zhang*

TL;DR: This work studied surface-enhanced Raman scattering (SERS) of MS2 monolayers that were transferred onto Ag nanorod arrays and reveals a promising SERS substrate for achieving uniform and strong enhancement for two-dimensional materials in the applications of optical detecting and sensing. (via Semantic Scholar)
Source: Web Of Science
Added: December 2, 2019

2018 journal article

Friction and work function oscillatory behavior for an even and odd number of layers in polycrystalline MoS2

NANOSCALE, 10(17), 8304–8312.

TL;DR: A new oscillatory behavior of nanoscopic friction in continuous polycrystalline MoS2 films for an odd and even number of atomic layers, where odd layers show higher friction and lower work function is reported. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Activating MoS2 for pH-Universal Hydrogen Evolution Catalysis

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 139(45), 16194–16200.

By: G. Li n, D. Zhang*, Y. Yu n, S. Huang n, W. Yang* & L. Cao n

TL;DR: A universal strategy that may be used to significantly improve the HER catalysis of MoS2 in all kinds of environments from acidic to alkaline, proton intercalation is demonstrated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Dynamic Optical Tuning of Interlayer Interactions in the Transition Metal Dichalcogenides

Nano Letters, 17(12), 7761–7766.

By: E. Mannebach*, C. Nyby*, F. Ernst*, Y. Zhou*, J. Tolsma*, Y. Li*, M. Sher*, I. Tung* ...

author keywords: 2D materials; interlayer van der Waals interactions; ultrafast; Casimir effect; femtosecond X-ray scattering
TL;DR: This work establishes a new method for dynamic, nonequilibrium tuning of correlation-driven dispersive interactions and of the optomechanical functionality of TMDC quasi-two-dimensional materials. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Source: Crossref
Added: December 16, 2019

2017 journal article

Enhancing Multifunctionalities of Transition-Metal Dichalcogenide Monolayers via Cation Intercalation

ACS Nano, 11(9), 9390–9396.

By: Y. Yu*, G. Li*, L. Huang*, A. Barrette, Y. Cai*, Y. Yu*, K. Gundogdu*, Y. Zhang*, L. Cao*

author keywords: hydrogen ion; lithium ion; intercalation; molybdenum sulfide; tungsten sulfide; molybdenum selenide; tungsten selenide
TL;DR: It is demonstrated that multiple functionalities of transition-metal dichalcogenide (TMDC) monolayers may be substantially improved by the intercalation of small cations between the monolayer and underlying substrates, including photoluminescence efficiency and catalytic activity. (via Semantic Scholar)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2017 journal article

Giant Gating Tunability of Optical Refractive Index in Transition Metal Dichalcogenide Monolayers

NANO LETTERS, 17(6), 3613–3618.

author keywords: 2D materials; transition metal dichalcogenide; photonics; electrical gating refractive index; exciton; WS2
TL;DR: It is reported that the refractive index of transition metal dichacolgenide monolayers, such as MoS2, WS2, and WSe2, can be substantially tuned by >60% in the imaginary part and >20% around exciton resonances using complementary metal-oxide-semiconductor (CMOS) compatible electrical gating. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

In Situ Monitoring of the Thermal-Annealing Effect in a Monolayer of MoS2

PHYSICAL REVIEW APPLIED, 7(3).

By: L. Su*, Y. Yu n, L. Cao n & Y. Zhang*

Source: Web Of Science
Added: August 6, 2018

2016 journal article

All The Catalytic Active Sites of MoS2 for Hydrogen Evolution

Journal of the American Chemical Society, 138(51), 16632–16638.

By: G. Li n, D. Zhang*, Q. Qiao*, Y. Yu n, D. Peterson n, A. Zafar*, R. Kumar n, S. Curtarolo* ...

TL;DR: It is demonstrated that, in addition to the well-known catalytically active edge sites, sulfur vacancies provide another major active site for the HER, while the catalytic activity of grain boundaries is much weaker. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2016 journal article

Atomically Thin MoS2 Narrowband and Broadband Light Superabsorbers

ACS NANO, 10(8), 7493–7499.

By: L. Huang n, G. Li n, A. Gurarslan n, Y. Yu n, R. Kirste n, W. Guo n, J. Zhao n, R. Collazo n ...

Contributors: L. Huang n, G. Li n, A. Gurarslan n, Y. Yu n, R. Kirste n, W. Guo n, J. Zhao n, R. Collazo n ...

author keywords: MoS2; two-dimensional materials; light absorption; leaky mode; resonant photonics
TL;DR: A combined theoretical and experimental effort to enable strong light absorption in atomically thin MoS2 films by integrating the films with resonant photonic structures that are deterministically designed using a unique reverse design approach based on leaky mode coupling. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2016 journal article

Chemical vapor deposited MoS2/electrospun carbon nanofiber composite as anode material for high-performance sodium-ion batteries

ELECTROCHIMICA ACTA, 222, 1751–1760.

By: C. Chen n, G. Li n, Y. Lu n, J. Zhu n, M. Jiang n, Y. Hu n, L. Cao n, X. Zhang n

Contributors: X. Zhang n, L. Cao n, Y. Hu n, M. Jiang n, J. Zhu, Y. Lu n, G. Li n, C. Chen n

author keywords: Molybdenum disulfide; carbon nanofiber; chemical vapor deposition; electrospinning; sodium-ion battery anode
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Engineering Substrate Interactions for High Luminescence Efficiency of Transition-Metal Dichalcogenide Monolayers

ADVANCED FUNCTIONAL MATERIALS, 26(26), 4733–4739.

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

2016 conference paper

Extreme manipulation of light-matter interactions in 2D TMDC materials

2016 Progress in Electromagnetics Research Symposium (PIERS), 3844–3844.

By: L. Cao n

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

2016 journal article

Fundamental limits of exciton-exciton annihilation for light emission in transition metal dichalcogenide monolayers

Physical Review B, 93(20).

By: Y. Yu n, Y. Yu, C. Xu n, A. Barrette n, . gundogdu n & L. Cao n

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

2016 journal article

Ripples near edge terminals in MoS2 few layers and pyramid nanostructures

APPLIED PHYSICS LETTERS, 108(8).

By: A. Mills*, Y. Yu n, C. Chen*, B. Huang*, L. Cao n & C. Tao*

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Van der Waals Force Isolation of Monolayer MoS2

ADVANCED MATERIALS, 28(45), 10055–10060.

TL;DR: Monolayer MoS2 can effectively screen the vdW interaction of underlying substrates with external systems by >90% because of the substantial increase in the separation between the substrate and external systems due to the presence of the monolayer. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Deterministic phase engineering for optical Fano resonances with arbitrary lineshape and frequencies

OPTICS EXPRESS, 23(15), 19154–19165.

By: J. Lin, L. Huang*, Y. Yu*, S. He & L. Cao*

TL;DR: An approach of deterministic phase engineering that can enable the rational design of optical Fano resonances with arbitrarily pre-specified lineshapes and uses dielectric grating structures as an example to illustrate the notion of deterministically engineer the phase by tuning the eigenfrequency. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Dynamic Structural Response and Deformations of Monolayer MoS2 Visualized by Femtosecond Electron Diffraction

Nano Letters, 15(10), 6889–6895.

By: E. Mannebach*, R. Li*, K. Duerloo*, C. Nyby*, P. Zalden*, T. Vecchione*, F. Ernst*, A. Reid* ...

author keywords: 2D materials; ultrafast; MoS2; structural dynamics; electron diffraction
TL;DR: It is shown that optical excitation induces large-amplitude in-plane displacements and ultrafast wrinkling of the monolayer on nanometer length-scales, developing on picosecond time-sc scales, which provides a new understanding of the dynamic structural processes that underlie the functionality of two-dimensional materials. (via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: August 6, 2018

2015 journal article

Effects of substrate type and material-substrate bonding on high-temperature behavior of monolayer WS2

NANO RESEARCH, 8(8), 2686–2697.

By: L. Su*, Y. Yu n, L. Cao n & Y. Zhang*

author keywords: tungsten disulfide; high temperature; Raman; temperature coefficient; photoluminescence; activation energy
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Engineering the Composition and Crystallinity of Molybdenum Sulfide for High-Performance Electrocatalytic Hydrogen Evolution

ACS CATALYSIS, 5(1), 448–455.

By: Y. Li n, Y. Yu n, Y. Huang*, R. Nielsen*, W. Goddard*, Y. Li*, L. Cao n

author keywords: molybdenum disulfide; molybdenum trisulfide; disulfur complex; nanocrystalline; oxidation
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Exciton-dominated Dielectric Function of Atomically Thin MoS2 Films

SCIENTIFIC REPORTS, 5.

By: Y. Yu n, Y. Yu n, Y. Cai*, W. Li*, A. Gurarslan n, H. Peelaers*, D. Aspnes n, C. Walle* ...

TL;DR: The knowledge of the dielectric function may enable capabilities to engineer the light-matter interactions of atomically thin MoS2 films for the development of novel photonic devices, such as metamaterials, waveguides, light absorbers, and light emitters. (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

2015 journal article

Two-dimensional transition-metal dichalcogenide materials: Toward an age of atomic-scale photonics

MRS BULLETIN, 40(7), 592–599.

By: L. Cao n

Source: Web Of Science
Added: August 6, 2018

2014 journal article

Dependence of coupling of quasi 2-D MoS2 with substrates on substrate types, probed by temperature dependent Raman scattering

NANOSCALE, 6(9), 4920–4927.

By: L. Su*, Y. Zhang*, Y. Yu n & L. Cao n

TL;DR: This study suggests that the 2-D film-substrate coupling depends sensitively on the preparation method, and in particular on the film morphology for the transferred film. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Equally Efficient Interlayer Exciton Relaxation and Improved Absorption in Epitaxial and Nonepitaxial MoS2/WS2 Heterostructures

Nano Letters, 15(1), 486–491.

By: Y. Yu*, S. Hu*, L. Su*, L. Huang*, Y. Liu*, Z. Jin*, A. Purezky*, D. Geohegan* ...

author keywords: Molybdenum disulfide; tungsten disulfide; van der Waals epitaxy; interlayer charge transfer; two-dimensional heterojunction
TL;DR: This result indicates that 2D heterostructures bear significant implications for the development of photonic devices, in particular those requesting efficient exciton separation and strong light absorption, such as solar cells, photodetectors, modulators, and photocatalysts, and suggests that the simple stacking of dissimilar 2D materials with random orientations is a viable strategy to fabricate complex functional 2Dheterostructure. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018

2014 journal article

Exciton valley relaxation in a single layer ofWS2measured by ultrafast spectroscopy

Physical Review B, 90(4).

By: C. Mai n, Y. Semenov n, A. Barrette n, Y. Yu n, Z. Jin n, L. Cao n, K. Kim n, K. Gundogdu n

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

2014 journal article

Layer-Dependent Electrocatalysis of MoS2 for Hydrogen Evolution

NANO LETTERS, 14(2), 553–558.

By: Y. Yu n, S. Huang n, Y. Li n, S. Steinmann*, W. Yang* & L. Cao n

author keywords: MoS2; monolayers; few layers; layer dependence; electrocatalyst; hydrogen evolution
TL;DR: The results suggest that increasing the hopping efficiency of electrons in the vertical direction is a key for the development of high-efficiency two-dimensional material catalysts. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Leaky mode engineering: A general design principle for dielectric optical antenna solar absorbers

Optics Communications, 314, 79–85.

By: Y. Yu n & L. Cao n

author keywords: Leaky mode; Optical antenna; Solar absorber; Solar cell; Semiconductor
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (Web of Science; OpenAlex)
Sources: Crossref, Web Of Science
Added: August 6, 2018

2014 journal article

Semiconductor Solar Superabsorbers

SCIENTIFIC REPORTS, 4.

By: Y. Yu n, L. Huang n & L. Cao n

TL;DR: This work designs a practical light trapping structure that can enable an ultrathin layer of semiconductor materials, for instance, 10 nm thick a-Si, absorb > 90% sunlight above the bandgap and points towards the development of ultimate solar light trapping techniques. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Sulfur gradient-distributed CNF composite: a self-inhibiting cathode for binder-free lithium-sulfur batteries

CHEMICAL COMMUNICATIONS, 50(71), 10277–10280.

By: K. Fu n, Y. Li n, M. Dirican n, C. Chen n, Y. Lu n, J. Zhu n, Y. Li*, L. Cao n ...

Contributors: X. Zhang n, P. Bradford n, L. Cao n, Y. Li n, J. Zhu n, Y. Lu n, C. Chen n, M. Dirican n, Y. Li*, K. Fu n

TL;DR: A self-inhibiting, gradient sulfur structure was designed and developed by the synthesis of a carbon nanofiber-sulphur composite via sulfur vapor deposition method for use as a binder-free sulfur cathode, exhibiting high sulfur loading and high sulfur content. (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

2014 journal article

Surface-Energy-Assisted Perfect Transfer of Centimeter-Scale Mono layer and Few-Layer MoS2 Films onto Arbitrary Substrates

ACS NANO, 8(11), 11522–11528.

author keywords: molybdenum disulfide; 2D materials; tungsten disulfide; surface energy; large scale
TL;DR: A surface-energy-assisted process that can perfectly transfer centimeter-scale monolayer and few-layer MoS2 films from original growth substrates onto arbitrary substrates with no observable wrinkles, cracks, and polymer residues is demonstrated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Ultrafast Electronic and Structural Response of Monolayer MoS2 under Intense Photoexcitation Conditions

ACS NANO, 8(10), 10734–10742.

By: E. Mannebach*, K. Duerloo*, L. Pellouchoud*, M. Sher*, S. Nah*, Y. Kuo*, Y. Yu n, A. Marshall* ...

author keywords: molybdenum disulfide; MoS2; second harmonic generation; ultrafast dynamics; monotayer femtosecond
TL;DR: This work reports on the dynamical response of single layer transition metal dichalcogenide MoS2 to intense above-bandgap photoexcitation using the nonlinear-optical second order susceptibility as a direct probe of the electronic and structural dynamics. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Controlled Scalable Synthesis of Uniform, High-Quality Monolayer and Few-layer MoS2 Films

SCIENTIFIC REPORTS, 3.

By: Y. Yu n, C. Li n, Y. Liu n, L. Su*, Y. Zhang* & L. Cao n

MeSH headings : Aluminum Oxide / metabolism; Disulfides / chemical synthesis; Disulfides / metabolism; Equipment Design; Graphite / metabolism; Molybdenum / metabolism; Semiconductors; Silicon Dioxide / metabolism; Surface Properties
TL;DR: This work presents a self-limiting approach that can grow high quality monolayer and few-layer MoS2 films over an area of centimeters with unprecedented uniformity and controllability and paves the way for the development of practical devices with 2DMoS2 and opens up new avenues for fundamental research. (via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Epitaxial nanosheet-nanowire heterostructures

Nano Letters, 13(3), 948–953.

By: C. Li, Y. Yu, M. Chi* & L. Cao*

author keywords: Heterostructures; epitaxial growth; nanosheets; nanowires; germanium sulfide; three-dimensional nanostructures
TL;DR: It is observed that exposing the pre-grown NWs to air prior to the seeded growth is critical for the formation of NSs to yield NS-NW heterostructures, which provide capabilities to monolithically integrate the functionality of 1D NWs and 2D NSs into a 3D space. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

General Modal Properties of Optical Resonances in Subwavelength Nonspherical Dielectric Structures

NANO LETTERS, 13(8), 3559–3565.

By: L. Huang n, Y. Yu n & L. Cao n

author keywords: Optical resonance; leaky mode; subwavelength dielectric structure; modal properties; optical antenna; dielectric metamaterials
TL;DR: It is demonstrated that the optical properties of nonspherical dielectric structures are dictated by the eigenvalue of the structure's leaky modes, which can serve as a powerful guide for the rational design of devices with desired optical resonances. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Many-Body Effects in Valleytronics: Direct Measurement of Valley Lifetimes in Single-Layer MoS2

Nano Letters, 14(1), 202–206.

By: C. Mai n, A. Barrette n, Y. Yu n, Y. Semenov n, K. Kim n, L. Cao n, K. Gundogdu n

author keywords: MoS2; valley relaxation; transient absorption; many-body interactions; transition metal dichalcogenides; two-dimensional materials
TL;DR: Direct measurements of valley relaxation dynamics in single layer MoS2 are reported by using ultrafast transient absorption spectroscopy, showing that strong Coulomb interactions significantly impact valley population dynamics and biexcitons form with more than an order of magnitude larger binding energy compared to conventional semiconductors. (via Semantic Scholar)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2013 journal article

Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene

ACS Nano, 7(4), 2898–2926.

By: S. Butler, S. Hollen, L. Cao n, Y. Cui*, J. Gupta, H. Gutiérrez*, T. Heinz*, S. Hong* ...

author keywords: two-dimensional materials; graphene; nanosheets; graphane; van der Waals epitaxy; van der Waals solid
MeSH headings : Graphite; Membranes, Artificial; Microelectrodes; Nanoparticles / chemistry; Nanoparticles / ultrastructure; Nanotechnology / trends; Transistors, Electronic
TL;DR: The properties and advantages of single-, few-, and many-layer 2D materials in field-effect transistors, spin- and valley-tronics, thermoelectrics, and topological insulators, among many other applications are highlighted. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2013 review

Progress, challenges, and opportunities in two-dimensional materials beyond graphene

[Review of ]. ACS Nano, 7(4), 2898–2926.

By: S. Butler, S. Hollen, L. Cao, Y. Cui, J. Gupta, H. Gutierrez, T. Heinz, S. Hong ...

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

2013 journal article

Redesigning Photodetector Electrodes as an Optical Antenna

NANO LETTERS, 13(2), 392–396.

By: P. Fan*, K. Huang*, L. Cao n & M. Brongersma*

author keywords: Nanowire photodetector; optical antenna; antenna electrodes; coupled optical resonators; cascading optical resonances; plasmonics
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Substrate Mediation in Vapor Deposition Growth of Layered Chalcogenide Nanoplates: A Case Study of SnSe2

The Journal of Physical Chemistry C, 117(12), 6469–6475.

Source: Crossref
Added: August 28, 2020

2013 journal article

The phase shift of light scattering at sub-wavelength dielectric structures

OPTICS EXPRESS, 21(5), 5957–5967.

By: Y. Yu* & L. Cao*

TL;DR: This analysis indicates that the light scattering is fundamentally dictated by the eigenvalue of the leaky modes of the structure, and suggests that the upper limit for the scattering efficiency of a cylindrical cylinder in free space is 4n, where n is the refractive index. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2012 journal article

An invisible metal–semiconductor photodetector

Nature Photonics, 6(6), 380–385.

By: P. Fan*, U. Chettiar*, L. Cao*, F. Afshinmanesh*, N. Engheta* & M. Brongersma*

Source: Crossref
Added: August 28, 2020

2012 journal article

Coupled leaky mode theory for light absorption in 2D, 1D, and 0D semiconductor nanostructures

Optics Express, 20(13), 13847.

By: Y. Yu & L. Cao*

TL;DR: An intuitive, simple theoretical model, coupled leaky mode theory (CLMT), is presented, which offers new intuitive physical insights that the light absorption of nanostructures is governed by the coupling efficiency between incident light and leaky modes of the structure. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Crossref
Added: August 28, 2020

2012 journal article

Dielectric Core-Shell Optical Antennas for Strong Solar Absorption Enhancement

NANO LETTERS, 12(7), 3674–3681.

By: Y. Yu, V. Ferry*, A. Alivisatos* & L. Cao*

author keywords: Core-shell; optical antenna; nanowires; solar absorption; solar cells
TL;DR: A new light trapping technique that exploits dielectric core-shell optical antennas to strongly enhance solar absorption and holds promise for cost reduction and efficiency improvement of solar conversion devices, including solar cells and solar-to-fuel systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Role of Boundary Layer Diffusion in Vapor Deposition Growth of Chalcogenide Nanosheets: The Case of GeS

ACS NANO, 6(10), 8868–8877.

By: C. Li n, L. Huang n, G. Snigdha n, Y. Yu n & L. Cao n

author keywords: nanosheets; boundary layer; diffusion-limited; vapor deposition; layered compound
MeSH headings : Chalcogens / chemical synthesis; Crystallization / methods; Diffusion; Gases / chemistry; Germanium / chemistry; Macromolecular Substances / chemistry; Materials Testing; Molecular Conformation; Nanostructures / chemistry; Nanostructures / ultrastructure; Particle Size; Sulfur / chemistry; Surface Properties
TL;DR: A synthesis of single-crystalline two-dimensional GeS nanosheets using vapor deposition processes is reported and it is shown that the growth behavior of the nanosheet is substantially different from those of other nanomaterials and thin films grown by vapor depositions. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Optical Coupling of Deep-Subwavelength Semiconductor Nanowires

Nano Letters, 11(4), 1463–1468.

By: L. Cao*, P. Fan* & M. Brongersma*

author keywords: Nanowire; optical antenna; coupled mode theory; photonic molecule; nanophotonics
MeSH headings : Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Nanostructures / chemistry; Nanostructures / ultrastructure; Optical Devices; Particle Size; Semiconductors
TL;DR: It is demonstrated that the broad band antenna response of a pair of NWs can be tuned significantly by engineering their optical coupling and an intuitive coupled-mode theory is developed to explain the observations. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2010 journal article

Resonant Germanium Nanoantenna Photodetectors

Nano Letters, 10(4), 1229–1233.

By: L. Cao*, J. Park*, P. Fan*, B. Clemens* & M. Brongersma*

author keywords: Photodetector; antenna; Mie resonance; nanophotonics; nanowire
MeSH headings : Germanium / chemistry; Nanostructures / chemistry; Nanotechnology / instrumentation; Photometry / instrumentation; Semiconductors
TL;DR: The presented high-performance photodetection scheme represents a significant step toward realizing integrated on-chip communication and manifests a new paradigm for developing miniaturized optoelectronics components. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2010 journal article

Semiconductor Nanowire Optical Antenna Solar Absorbers

Nano Letters, 10(2), 439–445.

author keywords: Solar cell; semiconductor nanowires; optical antennas; photon management; light trapping
TL;DR: It is proposed that by patterning the silicon layer in a thin film PV cell into an array of NWs, one can boost the absorption for solar radiation by 25% while utilizing less than half of the semiconductor material (250% increase in the light absorption per unit volume of material). (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2010 journal article

Spatially resolved Raman spectroscopy on indium-catalyzed core–shell germanium nanowires: size effects

Nanotechnology, 21(10), 105703.

TL;DR: The structure of indium-catalyzed germanium nanowires is investigated by atomic force microscopy, scanning confocal Raman spectroscopy and transmission electron microscopy and it is found that the diameter of the crystalline core varies along the nanowire, down to few nanometers. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2010 journal article

Tuning the Color of Silicon Nanostructures

Nano Letters, 10(7), 2649–2654.

By: L. Cao*, P. Fan*, E. Barnard*, A. Brown* & M. Brongersma*

author keywords: Silicon; nanophotonics; antenna; Mie resonance; structural color; sensors
TL;DR: It is demonstrated that a wide spectrum of colors can be generated by harnessing the strong resonant light scattering properties of Si nanostructures under white light illumination. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2009 journal article

Engineering light absorption in semiconductor nanowire devices

Nature Materials, 8(8), 643–647.

TL;DR: It is shown that leaky-mode resonances, which can gently confine light within subwavelength, high-refractive-index semiconductor nanostructures, are ideally suited to enhance and spectrally engineer light absorption in this important size regime. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2009 journal article

Single crystalline and core–shell indium-catalyzed germanium nanowires—a systematic thermal CVD growth study

Nanotechnology, 20(24), 245608.

MeSH headings : Catalysis; Crystallization / methods; Gases; Germanium / chemistry; Hot Temperature; Indium / chemistry; Macromolecular Substances / chemistry; Materials Testing; Molecular Conformation; Nanostructures / chemistry; Nanostructures / ultrastructure; Nanotechnology / methods; Particle Size; Surface Properties
TL;DR: By optimizing the growth temperature and gas pressure, high aspect ratio germanium nanowires have been obtained and chemical analysis of the nanowire tip indicates the presence of indium, validating its role as a catalyst. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2009 journal article

Synthesis parameter space of bismuth catalyzed germanium nanowires

Applied Physics Letters, 94(16), 163101.

author keywords: bismuth; catalysis; chemical vapour deposition; elemental semiconductors; germanium; nanowires; nucleation; semiconductor growth; semiconductor quantum wires
Source: Crossref
Added: August 28, 2020

2009 journal article

Ultrafast developments

Nature Photonics, 3(1), 12–13.

By: L. Cao* & M. Brongersma

Source: Crossref
Added: August 28, 2020

2008 journal article

Excitation of Local Field Enhancement on Silicon Nanowires

Nano Letters, 8(2), 601–605.

MeSH headings : Computer Simulation; Light; Macromolecular Substances / chemistry; Materials Testing; Models, Chemical; Molecular Conformation; Nanotechnology / methods; Nanotubes / chemistry; Nanotubes / ultrastructure; Optical Devices; Particle Size; Scattering, Radiation; Silicon / chemistry; Surface Properties; Titanium / chemistry
TL;DR: It is demonstrated that Si nanowires possessing metal-nanocluster coatings support a multiplicatively enhanced near-field light-matter interaction and indicates that these nanostructures may be an attractive and versatile material platform for the design of nanoscaled optical and optoelectronic circuits. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2007 journal article

On the Raman scattering from semiconducting nanowires

Journal of Raman Spectroscopy, 38(6), 697–703.

By: L. Cao*, L. Laim*, P. Valenzuela*, B. Nabet* & J. Spanier*

author keywords: raman scattering; Si nanowires; Si nanocones; raman antenna effect
Source: Crossref
Added: August 28, 2020

2007 journal article

Plasmon-Assisted Local Temperature Control to Pattern Individual Semiconductor Nanowires and Carbon Nanotubes

Nano Letters, 7(11), 3523–3527.

By: L. Cao*, D. Barsic*, A. Guichard* & M. Brongersma*

MeSH headings : Crystallization; Electrochemistry; Hot Temperature; Metals / chemistry; Microscopy, Electron, Scanning; Models, Statistical; Nanostructures; Nanotechnology / methods; Nanotubes, Carbon / chemistry; Nanowires / chemistry; Oscillometry; Oxides / chemistry; Semiconductors; Temperature
TL;DR: A new versatile strategy to rapidly heat and cool subdiffraction-limited volumes of material with a focused light beam that has great potential for use in process- and energy-efficient assembly of nanowires into complementary metal-oxide-semiconductor (CMOS) compatible device architectures. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Crossref
Added: August 28, 2020

2006 journal article

Formation mechanism of nonspherical gold nanoparticles during seeding growth: Roles of anion adsorption and reduction rate

Journal of Colloid and Interface Science, 293(1), 69–76.

By: L. Cao*, T. Zhu* & Z. Liu*

author keywords: gold nanoparticles; seeding growth; preferential adsorption; shape-controlled; kinetics; nonspherical; AuCl4
TL;DR: A small section of nonspherical particles can be observed in the further growth of spherical gold colloids exposed to a mixture of NH2OH and HAuCl4, which is proposed to be ascribed to the preferential adsorption of AuCl4- on {111} facets. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2006 journal article

Instability and Transport of Metal Catalyst in the Growth of Tapered Silicon Nanowires

Nano Letters, 6(9), 1852–1857.

By: L. Cao*, B. Garipcan*, J. Atchison*, C. Ni*, B. Nabet* & J. Spanier*

MeSH headings : Catalysis; Crystallization / methods; Gold / chemistry; Materials Testing; Metals / chemistry; Molecular Conformation; Motion; Nanotechnology / methods; Nanotubes / chemistry; Nanotubes / ultrastructure; Particle Size; Silicon / chemistry; Surface Properties
TL;DR: The reduction in size enables the controlled growth of SiNCs with tip sharpnesses approaching the atomic scale, indicating that metal-catalyst nanoparticles can play an even more dynamic role than previously thought, and suggesting additional modes of control of shape, and of nucleation and growth location. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2005 journal article

Diamond-Hexagonal Semiconductor Nanocones with Controllable Apex Angle

Journal of the American Chemical Society, 127(40), 13782–13783.

By: L. Cao*, L. Laim*, C. Ni*, B. Nabet* & J. Spanier*

MeSH headings : Gold / chemistry; Nanostructures / chemistry; Particle Size; Semiconductors; Silicon / chemistry
TL;DR: High-resolution transmission electron microscopy, selected-area electron diffraction and Raman scattering spectroscopy and analysis indicate that the SiNCs are of the diamond-hexagonal Si(IV) phase. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2005 journal article

Efficient self-assembly of transition metal oxide nanoclusters on silicon substrates

Thin Solid Films, 492(1-2), 13–18.

By: L. Cao*, Y. Chai*, P. Li*, Z. Shen* & J. Wu

author keywords: nanoparticles; self-assembly; transition metal oxide; electrostatic interaction
Source: Crossref
Added: August 28, 2020

2005 journal article

Surface-Enhanced Raman Scattering ofp-Aminothiophenol on a Au(core)/Cu(shell) Nanoparticle Assembly

ChemPhysChem, 6(5), 913–918.

author keywords: copper; gold; nanostructures; Raman spectroscopy; self-assembly
TL;DR: Surface-enhanced Raman scattering (SERS) of p-aminothiophenol (PATP) molecules adsorbed onto assemblies of Au(core)/Cu(shell) nanoparticles is reported and it is shown that the difference in chemical enhancement is mainly due to the state density and Fermi levels of the substrates. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2004 journal article

Kinetically Controlled Pt Deposition onto Self-Assembled Au Colloids:  Preparation of Au (Core)−Pt (Shell) Nanoparticle Assemblies

Chemistry of Materials, 16(17), 3239–3245.

By: L. Cao*, L. Tong*, P. Diao*, T. Zhu* & Z. Liu*

Source: Crossref
Added: August 28, 2020

2004 journal article

Uniform Electrochemical Deposition of Copper onto Self-Assembled Gold Nanoparticles

The Journal of Physical Chemistry B, 108(11), 3535–3539.

By: L. Cao*, P. Diao*, T. Zhu* & Z. Liu*

Source: Crossref
Added: August 28, 2020

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