Journal ArticleDOI
Modification of Gold Surfaces With Water-Soluble (Co)polymers Prepared Via Aqueous Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization
Brent S. Sumerlin,Andrew B. Lowe,Paul A. Stroud,Ping Zhang,Marek W. Urban,Charles L. McCormick +5 more
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In this paper, the authors reported the immobilization of poly(sodium 4-styrenesulfonate), poly((ar-vinylbenzyl) trimethylammonium chloride), poly(N,N-dimethylacrylamide), and poly(3-[2-(N-methylacrylido)-ethyldimethyl ammonio]propane sulfonate-b-N, N-dimethylamide) onto gold films.Abstract:
Reversible addition−fragmentation chain transfer (RAFT) is a versatile, controlled free radical polymerization technique that operates via a degenerative transfer mechanism in which a thiocarbonylthio compound acts as a chain transfer agent. The subsequent reduction of the dithioester end groups to thiols allows the preparation of (co)polymer-modified gold surfaces. Herein we report the immobilization of poly(sodium 4-styrenesulfonate), poly((ar-vinylbenzyl) trimethylammonium chloride), poly(N,N-dimethylacrylamide), and poly(3-[2-(N-methylacrylamido)-ethyldimethyl ammonio]propane sulfonate-b-N,N-dimethylacrylamide) onto gold films. The presence of the immobilized (co)polymers was confirmed by atomic force microscopy, attenuated total reflectance Fourier transform infrared spectroscopy, and surface contact angle measurements. The gold film modified with the block copolymer demonstrated stimuli-responsive behavior as evidenced by its water contact angle being similar to that of poly(N,N-dimethylacrylamide) ...read more
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Synthesis of well-defined polystyrene with primary amine end groups through the use of phthalimido-functional RAFT agents
TL;DR: In this paper, the phthalimidomethyl trithiocarbonates are used as reversible addition fragmentation chain transfer (RAFT) agents to provide low polydispersity α-(phthalimidmethyl) polystyrene with number-average molecular weight in the range 1000−100000 g mol-1.
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Temperature-Responsive Glycopolymer Brushes Synthesized via RAFT Polymerization Using the Z-group Approach
TL;DR: In this paper, stimuli-responsive glycopolymer brushes composed of N-acryloyl glucosamine (AGA) and N-isopropylacrylamide (NIPAAm) were prepared using RAFT polymerization.
Journal ArticleDOI
Synthesis of Well-Defined Homopolymer and Diblock Copolymer Grafted onto Silica Particles by Z-Supported RAFT Polymerization
Zhao,Sébastien Perrier +1 more
TL;DR: In this paper, a well defined homopolymer and diblock copolymer were prepared by RAFT polymerization mediated by Z-supported chain transfer agent (CTA) onto silica particles.
Journal ArticleDOI
A Facile Synthesis Route to Thiol-Functionalized α,ω-Telechelic Polymers via Reversible Addition Fragmentation Chain Transfer Polymerization
Journal ArticleDOI
Effect of Mild Visible Light on Rapid Aqueous RAFT Polymerization of Water-Soluble Acrylic Monomers at Ambient Temperature: Initiation and Activation
TL;DR: In this paper, the effect of visible light on aqueous RAFT polymerization was investigated by employing a periodic light-on−off process, and the results demonstrated that EDMAT was stable in acidic aqous solution but liable to hydrolysis in alkali solution; its absorption covers a wide visible light wave range of 388−520 nm.
References
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Journal ArticleDOI
Formation and Structure of Self-Assembled Monolayers.
TL;DR: Monolayers of alkanethiolates on gold are probably the most studied SAMs to date and offer the needed design flexibility, both at the individual molecular and at the material levels, and offer a vehicle for investigation of specific interactions at interfaces, and of the effect of increasing molecular complexity on the structure and stability of two-dimensional assemblies.
Journal ArticleDOI
Living free-radical polymerization by reversible addition - Fragmentation chain transfer: The RAFT process
John Chiefari,Y. K. Chong,Frances Ercole,Julia Krstina,Justine Leigh Jeffery,Tam P. T. Le,Roshan T. A. Mayadunne,Gordon Francis Meijs,Catherine Louise Moad,Graeme Moad,Ezio Rizzardo,San H. Thang +11 more
TL;DR: The authors proposed a reversible additive-fragmentation chain transfer (RAFT) method for living free-radical polymerization, which can be used with a wide range of monomers and reaction conditions and in each case it provides controlled molecular weight polymers with very narrow polydispersities.
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Formation of monolayer films by the spontaneous assembly of organic thiols from solution onto gold
Colin D. Bain,E. Barry Troughton,Yu-Tai Tao,Joseph Evall,George M. Whitesides,Ralph G. Nuzzo +5 more
TL;DR: In this paper, the authors used contact angles and optical ellipsometry to study the kinetics of adsorption of monolayer films and to examine the experimental conditions necessary for the formation of high-quality films.
Journal ArticleDOI
Biological surface science
TL;DR: Biological surface science (BioSS) as discussed by the authors is a broad interdisciplinary area where properties and processes at interfaces between synthetic materials and biological environments are investigated and bio functional surfaces are fabricated.
Journal ArticleDOI
A reversibly switching surface.
Joerg Lahann,Samir Mitragotri,Thanh-Nga T. Tran,Hiroki Kaido,Jagannathan Sundaram,Insung S. Choi,Saskia Hoffer,Gabor A. Somorjai,Robert Langer +8 more
TL;DR: The design of surfaces that exhibit dynamic changes in interfacial properties, such as wettability, in response to an electrical potential are reported, which enables amplification of molecular-level conformational transitions to macroscopic changes in surface properties without altering the chemical identity of the surface.