@article{nguyen_vries_stoyanov_2022, title={Chitin nanowhiskers with improved properties obtained using natural deep eutectic solvent and mild mechanical processing}, ISSN={["1463-9270"]}, DOI={10.1039/d2gc00305h}, abstractNote={Making chitin nanowhiskers (ChNW) using natural deep eutectic pretreatment and mild mechanical process. Compared with acid hydrolized, ChNW prepared by our process, show improved functional properties due to residual amorphous chitin on their surface.}, journal={GREEN CHEMISTRY}, author={Nguyen, Huy Vu Duc and Vries, Renko and Stoyanov, Simeon D.}, year={2022}, month={Apr} }
 @article{williams_roh_jacob_stoyanov_hsiao_velev_2021, title={Printable homocomposite hydrogels with synergistically reinforced molecular-colloidal networks}, volume={12}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/s41467-021-23098-9}, DOI={10.1038/s41467-021-23098-9}, abstractNote={AbstractThe design of hydrogels where multiple interpenetrating networks enable enhanced mechanical properties can broaden their field of application in biomedical materials, 3D printing, and soft robotics. We report a class of self-reinforced homocomposite hydrogels (HHGs) comprised of interpenetrating networks of multiscale hierarchy. A molecular alginate gel is reinforced by a colloidal network of hierarchically branched alginate soft dendritic colloids (SDCs). The reinforcement of the molecular gel with the nanofibrillar SDC network of the same biopolymer results in a remarkable increase of the HHG’s mechanical properties. The viscoelastic HHGs show >3× larger storage modulus and >4× larger Young’s modulus than either constitutive network at the same concentration. Such synergistically enforced colloidal-molecular HHGs open up numerous opportunities for formulation of biocompatible gels with robust structure-property relationships. Balance of the ratio of their precursors facilitates precise control of the yield stress and rate of self-reinforcement, enabling efficient extrusion 3D printing of HHGs.}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Williams, Austin H. and Roh, Sangchul and Jacob, Alan R. and Stoyanov, Simeon D. and Hsiao, Lilian and Velev, Orlin D.}, year={2021}, month={May}, pages={2834} }
 @article{nguyen_de vries_stoyanov_2020, title={Natural Deep Eutectics as a "Green" Cellulose Cosolvent}, volume={8}, ISSN={["2168-0485"]}, DOI={10.1021/acssuschemeng.0c04982}, abstractNote={In this study, we report a novel, green chemistry approach for creating new cellulose solvents based on a mixture of a natural deep eutectic solvent (NADES) and a primary cellulose solvent. Because...}, number={37}, journal={ACS SUSTAINABLE CHEMISTRY & ENGINEERING}, author={Nguyen, Huy Vu Duc and De Vries, Renko and Stoyanov, Simeon D.}, year={2020}, month={Sep}, pages={14166–14178} }
 @article{conner_veleva_paunov_stoyanov_velev_2020, title={Scalable Formation of Concentrated Monodisperse Lignin Nanoparticles by Recirculation-Enhanced Flash Nanoprecipitation}, volume={37}, ISSN={["1521-4117"]}, DOI={10.1002/ppsc.202000122}, abstractNote={AbstractA highly controllable and scalable process for fabrication of large amounts of concentrated lignin nanoparticles (LNPs) is reported. These lignin core nanoparticles are formed through flash nanoprecipitation, however, scaling up of the fabrication process requires fundamental understanding of their operational formation mechanism and surface properties. It is shown how a semicontinuous synthesis system with a recirculation loop makes it possible to produce flash precipitated lignin nanoparticles in large amounts for practical applications. The roles of the process parameters, including flow rates and lignin concentration, are investigated and analyzed. The results indicate that the LNPs are formed by a process of continuous burst nucleation at the point of mixing without diffusive growth, which yields nanoparticles of highly uniform size following a modified LaMer nucleation and growth mechanism. This mechanism makes possible facile process control and scale‐up. Effective control of the resulting nanoparticle size is achieved through the initial concentration of lignin in the injected solution. The impressive capability to produce suspensions of any predesigned multimodal distribution is demonstrated. The resulting nanofabrication technique can produce large volumes of concentrated LNP suspensions of high stability and tightly controlled size distributions for biological or agricultural applications.}, number={7}, journal={PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION}, author={Conner, Cathryn G. and Veleva, Anka N. and Paunov, Vesselin N. and Stoyanov, Simeon D. and Velev, Orlin D.}, year={2020}, month={Jul} }
 @article{roh_williams_bang_stoyanov_velev_2019, title={Soft dendritic microparticles with unusual adhesion and structuring properties}, volume={18}, ISSN={["1476-4660"]}, DOI={10.1038/s41563-019-0508-z}, abstractNote={The interplay between morphology, excluded volume and adhesivity of particles critically determines the physical properties of numerous soft materials and coatings 1-6 . Branched particles 2  or nanofibres 3 , nanofibrillated cellulose 4  or fumed silica 5  can enhance the structure-building abilities of colloids, whose adhesion may also be increased by capillarity or binding agents 6 . Nonetheless, alternative mechanisms of strong adhesion found in nature involve fibrillar mats with numerous subcontacts (contact splitting) 7-11  as seen in the feet of gecko lizards and spider webs 12-17 . Here, we describe the fabrication of hierarchically structured polymeric microparticles having branched nanofibre coronas with a dendritic morphology. Polymer precipitation in highly turbulent flow results in microparticles with fractal branching and nanofibrillar contact splitting that exhibit gelation at very low volume fractions, strong interparticle adhesion and binding into coatings and non-woven sheets. These soft dendritic particles also have potential advantages for food, personal care or pharmaceutical product formulations.}, number={12}, journal={NATURE MATERIALS}, author={Roh, Sangchul and Williams, Austin H. and Bang, Rachel S. and Stoyanov, Simeon D. and Velev, Orlin D.}, year={2019}, month={Dec}, pages={1315-+} }