Study on the effect of electrostatic interaction on core-shell nanoparticles preparation with microemulsion technique  

作　　者：HE Xiaoxiao WANG Kemin TAN Weihong CHEN Jiyun DUAN Jinghua YUAN Yin LIN Xia 

机构地区：[1]State Key Laboratory of Chemo/biosensing and Chemometrics, Engineering Center for Biomedicine, Institute of Life Science and Biological Technology, Hunan University, Engineering Research Center for Bio-Nanotechnology of Hunan Province, Changsha 410082, China

出　　处：《Chinese Science Bulletin》2005年第24期2821-2826,共6页

基　　金：supported by the National Key Basic Research Program(Grant No.2002CB513100-10);the High Tech Research and Development(863)Programme(Grant No.2003AA302250);the Key Project of Natural Science Foundation of China(Grant No.20135010);the National Natural Science Foundation of China(Grant No.20405005);the Key Technologies Research and Development Programme(Grant No.2003BA310A16).

摘　　要：The routine method for preparation of silica core-shell nanoparticles (NPs) is to carry out nucleation and shell coating through the hydrolysis of silane in water in oil (W/O) microemulsion to form three-dimensional netted silica shell. We found that electrostatic interaction of the core ma- terials with shell materials would determine whether the stable core-shell silica NPs formed or not. The traditional important factors such as molecular weight of core materials or the thickness of the shell have no obvious relationship with it. And the stability of the core-shell silica NPs can be im- proved after changing the electric charge polarity by regu- lating the experiment condition of relevant materials if some core materials cannot be doped inside to form the stable core-shell silica NPs based on the traditional method, which provided experimental and theoretic foundation for prepara- tion and application of the core-shell silica NPs.The routine method for preparation of silica core-shell nanoparticles （NPs） is to carry out nucleation and shell coating through the hydrolysis of silane in water in oil （W/O） microemulsion to form three-dimensional netted silica shell. We found that electrostatic interaction of the core materials with shell materials would determine whether the stable core-shell silica NPs formed or not. The traditional important factors such as molecular weight of core materials or the thickness of the shell have no obvious relationship with it. And the stability of the core-shell silica NPs can be improved after changing the electric charge polarity by regulating the experiment condition of relevant materials ff some core materials cannot be doped inside to form the stable core-shell silica NPs based on the traditional method, which provided experimental and theoretic foundation for preparation and application of the core-shell silica NPs.

关 键 词：硅纳米粒子 静电相互作用 稳定性 微乳液法 

分 类 号：TB383[一般工业技术—材料科学与工程]