A5015585250- Innovative Microfluidic and Catalytic Techniques Innovation
- Phase-change materials and chalcogenides
- Chalcogenide Semiconductor Thin Films
- Microfluidic and Capillary Electrophoresis Applications
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Rheology and Fluid Dynamics Studies
- Electrohydrodynamics and Fluid Dynamics
- Fluid Dynamics and Thin Films
- Transition Metal Oxide Nanomaterials
- Advanced Polymer Synthesis and Characterization
- Block Copolymer Self-Assembly
- Fiber-reinforced polymer composites
- Pickering emulsions and particle stabilization
- Electrowetting and Microfluidic Technologies
- Silicone and Siloxane Chemistry
- Synthetic Organic Chemistry Methods
- Liquid Crystal Research Advancements
- Engineering Applied Research
- Polymer Surface Interaction Studies
- biodegradable polymer synthesis and properties
- Synthesis and properties of polymers
- Polymer Science and PVC
- Polymer composites and self-healing
- Quasicrystal Structures and Properties
Shandong Jianzhu University
2025
Jiangsu University of Technology
2021-2023
University of Toronto
2000-2008
Changchun Institute of Applied Chemistry
1991-2004
Chinese Academy of Sciences
1998-2004
State Key Laboratory of Polymer Physics and Chemistry
2004
Small-scale engineering: A new strategy for the production of monodisperse colloid particles with precise control their size, shape, and composition has been developed. Highly liquid droplets are formed by using a microfluidic device. The shaped in microchannel (spheres, disks, rods; see images) solidified situ either polymerization or thermal setting.
This paper reports a microfluidic method for fast continuous synthesis of Janus particles and three-phase with narrow size distribution. Synthesis included emulsification monomer liquids in-situ photoinitiated polymerization multiphase droplets. We show the strategy precise control over structure their structure-dependent assembly in clusters. demonstrate an asymmetric chemical modification surface JPs by conjugating them protein molecules. The ternary were synthesized from largely...
We report a strategy for the production of materials with structural hierarchy. The approach employs polymer microgels as templates synthesis semiconductor, metal, or magnetic nanoparticles (NPs). show that NPs predetermined dimensions and size-dependent properties can be synthesized by using very delicate balance between reaction conditions, composition structure microgel templates, concentration in microgel. Postheat treatment doped semiconductor reduces NP polydispersity allows control...
We report a novel approach to continuous and scalable production of core−shell droplets polymer capsules in microfluidic devices. The described method is also useful the synthesis particles with nonspherical shapes. used capillary instability-driven break-up liquid jet formed by two immiscible fluids. Precise control emulsification each allowed for highly monodisperse predetermined diameter cores thickness shells. achieved over number per droplet location droplet. carried out fast throughput...
This article provides an overview of our work in the area synthesis polymer particles continuous microfluidic reactors. The method includes (a) generation highly monodisperse monomer droplets a flow-focusing device and (b) in-situ solidification these by means photopolymerization. We discuss effect properties on emulsification process, polymerization rate production high-quality particles, role material droplet formation, with different shapes compositions. also demonstrate ordered arrays...
This article describes emulsification in a microfluidic double droplet generator (DDR) comprising two consecutive flow-focusing devices with locally modified surface chemistry. We generated W/O/W, O/O/W and O/W/O emulsions precisely controlled sizes morphology of droplets. Secondly, by combining mechanisms formation (the mechanism the break up liquid threads at T-junction) we produced multiple populations droplets varying size and/or composition. These were used as structural units for...
Miniaturisierte Technik: Eine neue Strategie für die größen-, form- und zusammensetzungsspezifische Herstellung monodisperser Kolloidpartikel wird vorgestellt. Hoch monodisperse Flüssigkeitstropfen werden mithilfe einer Mikrofluidikvorrichtung gebildet. Die Tropfen in einem Mikrokanal Form gebracht (Kugeln, Scheiben Stäbe; siehe Bilder) situ entweder durch Polymerisation oder Thermofixierung verfestigt.
Abstract We have synthesized semiconductor and metal nanoparticles (NPs) in the constrained geometry of polymer microgels. used electrostatically driven attraction between ionic groups microgels precursor cations bulk liquid medium to introduce interior microgel. In second step, microgel reacted with anion (to obtain NPs) or they were treated a reducing agent NPs). Good control over size concentration NPs particles was achieved by changing composition corresponding The doped spheres heated...
We used coupling of flow and geometric confinement to assemble emulsion droplets in two-dimensional gliding lattices with a high degree order symmetry. Highly monodisperse discoid circular shapes were generated microfluidic flow-focusing device. Originally, close-packed formed from these droplets. Progressive led the gradual deformation disks: first, they elongated direction parallel then transformed into hexagons. Assembly driven by combination also allowed for formation bimodal size...
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTContinuous Synthesis of Copolymer Particles in Microfluidic ReactorsPatrick C. Lewis, Robert R. Graham, Zhihong Nie, Shengqing Xu, Minseok Seo, and Eugenia KumachevaView Author Information Department Chemistry, University Toronto, 80 Saint George Street, Ontario M5S 3H6, Canada Cite this: Macromolecules 2005, 38, 10, 4536–4538Publication Date (Web):April 15, 2005Publication History Received17 January 2005Revised11 March 2005Published online15 April...
ABSTRACT Confining the diffusion rate of aqueous amine monomers during interfacial polymerization (IP) via incorporating nanoparticles/macromolecules with special functional groups and/or creating an interlayer owning suitable properties is attractive alternative to construct a polyamide (PA) nanofilm featuring unique surface morphologies. However, fabrication high‐performance nanofiltration (NF) membranes both structural compositions and ultrathin PA separating layers still great challenge....
We present a study of convection in thin layers poly(dimethyl siloxane) (PDMS) oligomers end-terminated with different functional groups. In PDMS, silanol-, and aminopropyl-terminated surface-tension-driven produces ordered hexagonal patterns critical wavenumber k ≈ 2. The onset is close to that predicted by linear theory. films methacryloxypropyl-terminated PDMS (MAOP-PDMS) suppressed, despite the fact macroscopic physical properties favor this type convection. thick MAOP-PDMS, mixed...
We failed to reference the interesting and relevant work of Gañán-Calvo co-workers: A. M. Gañán-Calvo, Phys. Rev. Lett. 1998, 80, 285; J. Gordillo, 2001, 87, 274 501; I. G. Loscertales, Barrero, Guerrero, R. Cortijo, Marquez, Science 2002, 295, 1695. would also like point interested reader other reports, such as: Cohen, H. Li, L. Hougland, Mrksich, S. Nagel, 292, 265; Sugiura, Nakajima, Itou, Seki, Macromol. Rapid. Commun. 22, 773; T. Nisisako, Torii, Higuchi, Chem. Eng. 2004, 101, 23....
Wir versäumten, in unserer Veröffentlichung die interessanten und wesentlichen Arbeiten von Gañán-Calvo et al. zu zitieren: A. M. Gañán-Calvo, Phys. Rev. Lett. 1998, 80, 285; J. Gordillo, 2001, 87, 274 501; I. G. Loscertales, Barrero, Guerrero, R. Cortijo, Marquez, Science 2002, 295, 1695. Des Weiteren möchten wir den interessierten Leser auf weitere wichtige Berichte hinweisen, z. B.: Cohen, H. Li, L. Hougland, Mrksich, S. Nagel, 292, 265; Sugiura, Nakajima, Itou, Seki, Macromol. Rapid....
A new strategy for producing ordered polymeric films is proposed, which employs replication of interfacial instabilities. In the first step, a thin film monomeric fluid brought in contact with nonpolymerizable template layer poly(dimethylsiloxane), and surface tension-driven convection induced liquid. second stage, Bénard cells replicated by viscous drug are trapped solid state UV-induced polymerization. Following this removed. The topographic patterns "frozen" have lateral vertical...
Yttrium-doped Sb phase change thin films were prepared by magnetron sputtering and the in-situ resistance temperature measurement system was used to study process of films. With addition yttrium atoms, crystallization film increases, indicating improvement their thermal stability data retention ability. Furthermore, yttrium-doped have higher crystalline amorphous resistance, which is conducive transition Joule heating under electric pulse current. The optical band gap energy increases after...
A novel approach to producing ordered patterns in polymeric films was developed, which employs (i) the generation of nonequilibrium periodic convection thin liquid layers monomers and (ii) UV-induced polymerization convecting fluids under controlled conditions that preserve periodicity pattern. We established an structure induced by buoyancy-driven a layer methacryloxypropyl-terminated dimethylsiloxane can be trapped solid state analyzed characteristic length scales solidified film.
Abstract Superlattice-like (SLL) Ti/Sb thin films were proposed and investigated from the viewpoint of physical properties, structural characteristics, electronic application. Magnetron sputtering was employed to deposit SLL with different thickness ratios. In-situ resistance–temperature measurement indicates that crystallization temperature, crystallization-activation energy, data-retention capacity increase significantly resistance drift index reduces an increment in ratio Ti Sb layer,...
Y-doped Ge 1 Sb 9 thin films have higher crystallization temperature and data retention capacity.
The effects of yttrium dopants on the phase change behavior and microstructure Sn15Sb85films have been systematically investigated. yttrium-doped Sn15Sb85film has higher transition temperature, ten year data retention ability crystallization activation energy, which represent a great improvement in thermal stability retention. X-ray diffraction, transmission electron microscopy x-ray photoelectron spectroscopy reveal that amorphous Sn Y components restrict grain growth decrease size. Raman...