Thermoresponsive Amphiphilic Diblock Copolymers Synthesized by MADIX/RAFT: Properties in Aqueous Solutions and Use for the Preparation and Stabilization of Gold Nanoparticles
作者： Stéphanie Sistach , Mariana Beija , Virginie Rahal , Annie Brûlet , Jean-Daniel Marty
DOI: 10.1021/CM100674P
关键词:
摘要: Well-defined diblock copolymers comprising thermosensitive poly(N-isopropyl acrylamide) (PNIPAM) and poly(n-butylacrylate) (PBA) blocks were synthesized by macromolecular design interchange of xanthates (MADIX)/reversible addition−fragmentation chain transfer polymerization (RAFT) using a xanthate-type mediating agent. Their behavior in aqueous solution as function temperature was studied scattering microscopy techniques. The cloud point values strongly correlated to the hydrophobic content copolymers. Moreover, above point, block copolymer structure led formation large reversible aggregates with well-defined sizes. Those polymers then used study synthesis stability gold nanoparticles (AuNPs) dispersions either coating preformed AuNPs or situ preparation. In this latter case, we showed that appropriate choice polymer concentration allows one control size AuNPs. Furthermore, embedd...
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