Synthesis of cationic hyperbranched multiarm copolymer and its application in self-reducing and stabilizing gold nanoparticles
writer：Zhai, S.; Hong, H. Y.; Zhou, Y. F.*; Yan, D. Y.*
keywords：gold nanoparticles, hyperbranched polymers, self-reduction, stabilization
source：期刊
specific source：Sci. China Ser. B-Chem. 2010, 53, 1114. http://link.springer.com/article/10.1007/s11426-010-0145-5
Issue time：2010年
A novel hyperbranched multiarm copolymer of HBPO-
star-PDEAEMA with a hydrophobic poly(3-ethyl-3-(hydroxymethyl) oxetane) (HBPO) core and many cationic poly(2-(
N,N-diethylamino)ethyl methacrylate) (PDEAEMA) arms has been synthesized through an atom transfer radical polymerization (
ATRP) method, and been applied to spontaneously reduce and stabilize gold nanoparticles (
AuNPs)
in water without other additional agents. The size of the nanoparticles
could be effectively controlled at about 4 nm, and the nanoparticles
are extremely stable in solution without aggregation even for one year.
It was found that solution pH and the molar ratio of N/Au have certain
effects on the size and stability of
AuNPs. This work provides a simple method for the synthesis of uniform and highly stable
AuNPs.