溶胶凝胶法制备圆柱形大孔二氧化硅反蛋白石结构晶体

Cylindrical macroporous silica inverse opal structures coassembled by sol-gel assembly method

利用溶胶凝胶法在不同直径的毛细管表面制备了圆柱形二氧化硅反蛋白石多孔结构.利用扫描电子显微镜表征了其形貌,发现胶体晶体的类(111)面结构整体为圆柱形,平行于毛细管表面.透射光谱结果表明,二氧化硅多孔结构在[111]方向具有典型的光子带隙效应,与布拉格理论相符合,有望应用到光通讯和传感领域.

Cylindrical macroporous silica structures are fabricated on the surfaces of glass capillary with different diameters by a sol-gel cooperative assembly method. The cylindrical inverse opals are characterized by scanning electron microscope, showing that the （111）-like plane of face-centered-cubic （fcc） structure is parallel to the surface of the cylindrical capillary. Transmission spectra demonstrate typical photonic band gaps （PBGs） of about 40% in the direction of [111] lattice orientation, which accords well with the result from the Bragg formula. The excellent optical properties not only affirm the success of sol-gel coassembled macroporous silica inverse opals on cylindrical substrates, but also introduce PBG materials to meet the requirements of the practical applications of optical communication, optical switching and sensors.