磁响应Fe3O4 PVP SiO2胶体光子晶体的制备及光学性质.pdf

Applied Physics 应用物理, 2016, 6(4), 54-62 Published Online April 2016 in Hans. /journal/app /10.12677/app.2016.64008 Synthesis and Optical Properties of Magnetically Responsive Fe3O4/PVP/SiO2 Colloidal Photonic Crystals Ping Han1, Changhao Chen1, Xiaoli Huo2, Wenying Zhang1, Wenfeng Jiang1, Xuegang Lu1*, Gongying Liang1* 1MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi’an Jiaotong University, Xi’an Shaanxi 2Ganshan Management Office, Eastern Oil Pipeline Co., Ltd., Xi’an Shaanxi Received: Apr. 3rd, 2016; accepted: Apr. 22nd, 2016; published: Apr. 25th, 2016 Copyright ? 2016 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract Magnetic responsive colloidal photonic crystals have great potential to be used in color display, light swich etc. due to their performance of tunable photonic band-gap, fast response and easy prepara- tion. In this paper, a solvothermal method was used to prepare Fe3O4/PVP colloidal particles and the particles were then coated with SiO2 by TEOS hydrolysis to form Fe3O4/PVP/SiO2 composite particles. SEM and TEM results show that as-prepared Fe3O4/PVP/SiO2 particles possess monodisperse cha- racteristics and the mean particle size is about 100 nm. VSM results show that Fe3O4/PVP/SiO2 par- ticles have superparamagnetism and the saturation magnetization Ms is about 26 emu/g. After ref- luxing treatment in