为获得光子晶体用单分散性较好、表面光滑的SiO2球形颗粒.对传统Stober法进行改进,分析了氨水和正硅酸乙酯(TEOS)浓度对SiO2微球粒径的影响,提出了单分散SiO2微球的形成机理,利用X射线衍射分析仪(XRD)和场发射扫描电子显微镜(SEM)对样品结构和形貌进行了表征.XRD分析表明,合成的SiO2微球为无定形态;SEM照片显示SiO2微球粒径在292～750nm范围内,微球粒径偏差均在5%以下.
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