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 di‐ and tri‐tertiary amine containing methacrylic monomers and their (co)polymerization via RAFT
Bing Yu,Andrew B. Lowe +1 more
TL;DR: In this paper, reversible addition-fragmentation chain transfer (RAFT) polymerization, and aqueous phase behavior of three methacrylic monomers containing two or three pendent tertiary amine functional groups are described.
Reference EntryDOI
Reversible Addition–Fragmentation Chain Transfer Polymerization
TL;DR: The reversible addition-fragmentation chain transfer (RAFT) as mentioned in this paper is a free radical polymerization with reversible addition of a thiocarbonylthio compound (ZC(S)SR) to a conventional radical polymers.
Journal ArticleDOI
Controlled Modification of Cellulosic Surfaces via the Reversible Addition–Fragmentation Chain Transfer (RAFT) Graft Polymerization Process
TL;DR: In this paper, a solid-supported chain transfer agent (R-group approach) is used to mediate the controlled graft polymerization from the different cellulosic surfaces such as cotton fabric and filter paper.
Patent
Lanthanide nanoparticle conjugates and uses thereof
TL;DR: The present disclosure is directed generally to lanthanide nanoparticle conjugates and their use in targeting, treating, and/or imaging disease states in a patient, as discussed by the authors.
Journal ArticleDOI
In situ synthesis of the Ag/poly(4-vinylpyridine)-block-polystyrene composite nanoparticles by dispersion RAFT polymerization
TL;DR: In this paper, a method of one-pot synthesis of colloid-like metal/block-copolymer nanocomposites of poly(4-vinylpyridine)-block-polystyrene (P4VP-b-PS) and Ag nanoparticles by dispersion RAFT polymerization is proposed.
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.
Journal ArticleDOI
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.