Design and synthesis of dual thermoresponsive and antifouling hybrid polymer/gold nanoparticles

Cyrille Boyer, Michael Raymond Whittaker, Mario Luzon, Thomas Paul Davis

Research output: Contribution to journalArticleResearchpeer-review

173 Citations (Scopus)

Abstract

A series of thermosensitive copoly(oligoethylene oxide) acrylates with narrow polydisper- sities were prepared by the copolymerization of oligo(ethylene oxide) acrylate and di(ethylene oxide) ethyl ether acrylate using reversible addition-fragmentation chain transfer polymerization (RAFT). These copolymers exhibit tunable LCST behavior over the range of 15-90 ?C dependent on their monomer compositions. Subsequently, these copolymers were grafted onto gold nanoparticle (GNP) surfaces yielding thermosensitive gold nanoparticles. The thermoresponsive properties of these hybrid GNPs/poly(OEG-A- co-DEG-A) nanoparticles were evaluated in solution using dynamic light scattering and UV-vis spectroscopy. In addition, the susceptibility of these GNPs to protein fouling was assessed by a Bradford s assay and found to be significantly reduced by the copolymer stabilizing layer. We also demonstrate, in a unique one- pot assembly process, the synthesis of a hybrid nanoparticle that shows dual temperature responsiveness. These hybrid nanoparticles open new applications in biotechnology and medicine.
Original languageEnglish
Pages (from-to)6917 - 6926
Number of pages10
JournalMacromolecules
Volume42
Issue number18
DOIs
Publication statusPublished - 2009
Externally publishedYes

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