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研究了溶胶凝胶协同自组装制备大面积高质量SiO_2反蛋白石结构薄膜的方法.向单分散的聚苯乙烯(PS)胶体溶液中添加SiO_2前驱物溶液,用垂直自组装法一步得到微球空隙中均匀填充有凝胶的复合PS胶体晶体薄膜,在空气中烧结去除PS后得到SiO_2反蛋白石结构薄膜.通过对添加前驱物溶液比例、自组装温度以及烧结温度等参数的研究,用不同粒径的PS微球制备了不同孔径的高质量SiO_2反蛋白石结构薄膜,用扫描电子显微镜和X射线能量色散谱仪对制备得到的薄膜样品进行显微形貌和成分表征,并测试了其透射光谱.结果表明:溶胶凝胶协同自组装法制备的SiO_2反蛋白石结构薄膜大面积高度有序,孔径可以控制且选择范围宽;薄膜的透射光谱带隙明显,带隙中心波长与理论计算结果相符.
A method for preparing large-area, high-quality SiO 2 inverse opal films by sol-gel co-self-assembly was studied. The SiO 2 precursor solution was added to the monodisperse polystyrene (PS) colloid solution and the microsphere voids Which is uniformly filled with gel in the form of a gel, is obtained after sintering in air to remove PS and obtain an anti-opal structure film of SiO 2. By studying the parameters such as the proportion of the precursor solution added, the self-assembly temperature and the sintering temperature, PS micro-spheres were prepared with different pore sizes of high-quality SiO 2 inverse opal films. The morphology and composition of the films were characterized by scanning electron microscopy and X-ray energy dispersive spectroscopy. The transmission spectra were also tested. The results show that the SiO_2 inverse opal films prepared by the sol-gel co-self-assembly method are highly ordered and the pore size can be controlled and the selection range is wide. The band gap of the film is obvious, and the central wavelength of the band gap is consistent with the theoretical calculation.