SiO_2@PANI光子晶体的制备及电致变色性能研究

Preparation and Electrochromic Property of SiO_2@PANI Photonic Crystals

应用Stber法合成单分散SiO2微球,通过垂直沉积自组装光子晶体,由电化学法在所组装的SiO2微球表面生成聚苯胺(PANI),得到了核-壳结构SiO2@PANI光子晶体薄膜.测试了SiO2@PANI光子晶体薄膜的循环伏安曲线、多电位紫外吸收光谱、对比度、响应时间等电致变色性能,结果表明,该光子晶体薄膜在变色时颜色亮丽,其最大对比度可达77%,远高于单纯PANI薄膜的43%,同时响应时间变快.初步实验结果说明将光子晶体结构引入导电聚合物中,能够提高其电致变色性能.

Monodisperse silica particles were prepared by the modified Stoeber method,and the SiO2 opal film was obtained by a vertical deposition self-assembly method. Polyaniline was infiltrated into the SiO2 opal template via electrochemical methods, so as to fabricate core-shell structured SiO2 @ PANI photonic crystal films. The eleetrochromie properties,contrast and response time of the SiO2@ PANI film were characterized via cycle voltammograms and spectroeleetrochemistry. It was found that the color of the SiO2 @ PANI film was bright and vibrant with a maximal contrast of 77% ,which was superior to that of the pure PANI film （43%） , and its response speed was faster. It is an effective method to improve the electrochromic performances of conducting polymers by introducing the photonic crystal structures.