Fabrication of Au@Ag core-shell nanoparticles using polyelectrolyte multilayers as nanoreactors.
A new synthetic strategy has been developed for the fabrication of Au-Ag bimetallic core-shell nanoparticles (NPs) using polyelectrolyte multilayers (PEMs) as unique nanoreactors. Bimetallic NPs composed of Au core and Ag shell were successively incorporated into PEMs by repeating anion/cation exchange/reduction cycle multiple times in a stepwise manner. The strategy described here allows for the facile preparation of Au@Ag core-shell NPs with well-controlled core and shell dimensions and geometrically tunable optical properties by simply varying the number of ion-exchange/reduction cycles in the PEM matrix. The strategy can be extended to synthesize in situ other core-shell NPs in polymer matrix.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, PR China.
Xin
X
Zhang
Hui
H
Wang
Zhaohui
Z
Su
D004573:Electrolytes / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
D004573:Electrolytes; D011108:Polymers; D012834:Silver; D006046:Gold