Journal
LANGMUIR
Volume 23, Issue 26, Pages 12842-12848Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la702741q
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Poly (N-isopropylacrylamide) (PNIPAM) with a narrow molecular weight distribution was prepared by reversible addition - Poly (N- i sopropyl acrylamide) (PNIPAM) with a narrow molecular weight distribution was prepared by reversible addition-fragmentation chain transfer (RAFT) radical polymerization. A dithioester group at the chain end of PNIPAM thus prepared was cleaved by treating with 2-ethanolamine to provide thiol-terminated PNIPAM with which gold nanoparticles were coated via reactions of the terminal thiol with gold. The thermoresponsive nature of the maximum wavelength of the surface plasmon band and hydrodynamic radius (Rh) for the,PNIPAM-coated gold nanoparticles were found to be sensitively affected by added salt. In pure water, Rh for the PNIPAM-coated gold nanoparticles at 40 degrees C (>lower critical solution temperature (LCST)) was smaller than that at 25 degrees C (lower critical solution temperature (LCST)) was smaller than that at 25 degrees C (
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