Synthesis and self-assembly of monodisperse silver-nanocrystal-doped silica particles |
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| Authors: | Chen Dong Li Linlin Liu Jianshu Qi Shuo Tang Fangqiong Ren Xiangling Wu Wei Ren Jun Zhang Lin |
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| Institution: | Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China. |
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| Abstract: | A simple method based on the St?ber 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. |
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