Synthesis and self-assembly of monodisperse silver-nanocrystal-doped silica particles.
A simple method based on the Stöber reaction was developed to prepare silver-nanocrystal-doped silica composite particles. The silane coupling agent N-[3-(trimethoxysilyl)dropyl]ethylene diamine (TSD) incorporated Ag+ into a siloxane framework and a further chemical reducer reduced Ag+ to silver nanoparticles. TEM images showed that, in the presence of TSD, silver nanocrystals (fcc) of 2-8 nm were homogeneously doped in the silica particles, which showed a typical surface plasmon resonance (SPR) peak. The as-prepared Ag/SiO2 composite particles can be self-assembled into long-range ordered lattices (or photonic crystals) over large areas.
Chen
Dong
D
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
Li
Linlin
L
Liu
Jianshu
J
Qi
Shuo
S
Tang
Fangqiong
F
Ren
Xiangling
X
Wu
Wei
W
Ren
Jun
J
Zhang
Lin
L