NaCl改性SiO_2微球的制备及其自组装光子晶体研究  

Preparation of SiO_2 microspheres with NaCl and self-assembly of photonic crystals

作　　者：刘立营[1] 王秀峰[1] 程冰[1] 章春香[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《功能材料与器件学报》2009年第4期345-349,共5页Journal of Functional Materials and Devices

基　　金：国家自然科学基金(批准号:50372038)

摘　　要：为提高SiO2微球的表面电荷密度,通过改进St ber法,引入电解质NaCl合成SiO2微球,并采用垂直沉积法制备出光子晶体。通过Zeta电位粒度仪、带EDS能谱仪的场发射扫描电子显微镜(SEM)和紫外-可见-近红外光谱仪对其电学性能、显微形貌和光学性能进行测试分析。Zeta电位测试结果显示改性SiO2微球的Zeta电位平均提高11.39mV;EDS能谱分析表明微球中含有钠元素;SEM照片表明样品平均粒径为334 nm,平均标准偏差小于5%,所得光子晶体为面心立方密排结构;吸收光谱表明在725nm处具有光子晶体带隙。SiO2 microspheres were prepared by improving the Stober method which added NaCl in solution systems for improving surface charge of the SiO2 microspheres, and then SiO： photonic crystals were fabricated by the vertical deposition method at 40℃ and 60% relative humidity. The electrical properties, micromorphology and optical properties were characterized by Zeta potential instrument, Scanning electron microscope （SEM） with energy dispersive X- Ray spectroscopy and Uv -VisNir spectrophotometer. Zeta potential of the modified SiO2 mierospheres in ethanol solution was averagely heightened 11.39mV ; EDS spectra showed that there was Na element in microspheres; SEM images showed that the average size of modified SiO2 microspheres was 334 nm, and its distribution standard deviation was less than 5% , and the sample of SiO2 photonic crystals was face - centered cubic structure with its （ 111 ） planes parallel to the substrate; Absorption spectra showed that the existence of photonic band gap was at 725 nm.

关 键 词：光子晶体 胶体晶体 二氧化硅微球 改性 

分 类 号：O734[理学—晶体学]