A Comparative Study of Chemical Routes for Coating Gold Nanoparticles via Controlled RAFT Emulsion Polymerization
authors Pereira, SO; Barros-Timmons, A; Trindade, T
nationality International
journal PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
keywords CHAIN-TRANSFER POLYMERIZATION; CARBON NANOTUBES; BLOCK-COPOLYMERS; HYBRID LATEXES; ENCAPSULATION; PARTICLES; OXIDE; NANOCOMPOSITES; POLYMERS; SURFACES
abstract The synthesis of core-shell Au nanoparticles protected by an amphiphilic block copolymer is investigated by distinct reversible addition fragmentation chain transfer (RAFT) emulsion polymerization routes. The controlled polymerization of polymer shells onto Au nanoparticles is attempted by using the macroRAFT (MR) agent based on 2-(dodecylthiocarbonothioylthio)2- methylpropionic acid synthesized via RAFT polymerization of poly(ethylene glycol) methyl ether acrylate and exploring several approaches, which include (i) post-modification; (ii) in situ synthesis and (iii) "grafting from" strategies. In the conditions investigated here all these strategies lead to Au polymer nanocomposites but morphological well-defined core-shell nanoparticles are only obtained by applying the "grafting from" strategy. In particular, conditions that promote chain extension from the MR agent adsorbed onto the Au nanoparticles are found necessary to obtain nanostructures with such morphological characteristics and that still show the localized surface plasmon resonance typical of colloidal Au nanoparticles.
publisher WILEY-V C H VERLAG GMBH
issn 0934-0866
year published 2017
volume 34
issue 2
digital object identifier (doi) 10.1002/ppsc.201600202
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000396902700009
  ciceco authors
  impact metrics
times cited (wos core): 1
journal impact factor (jcr 2016): 4.474
5 year journal impact factor (jcr 2016): 3.776
category normalized journal impact factor percentile (jcr 2016): 77.333
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