圆柱形蛋白石和反蛋白石结构光子晶体的制备及其光学性质

Fabrication of cylindrical opals and inverse opals and their optical properties

研究了在圆柱曲面基底上自组装空心和实心的圆柱形蛋白石和反蛋白石结构光子晶体的方法.用垂直沉积法在不同曲率半径的毛细管内自组装了空心圆柱形聚苯乙烯(PS)蛋白石结构光子晶体薄膜和二氧化硅(SiO2)反蛋白石结构薄膜;用类重力沉积法制得实心圆柱形蛋白石和反蛋白石结构光子晶体,并讨论了这一生长方式中的状态变化过程及影响因素.用扫描电子显微镜对样品内部结构进行了表征,用光谱仪测试了光子晶体薄膜的反射光谱,结果表明:基底曲率半径和微球粒径的大小是影响空心蛋白石和反蛋白石薄膜质量的主要因素;微球大小是影响实心结构有序性的主要因素.

Hollow and solid cylindrical opals and inverse opals have been made by the self-assembly method in a capillary. The mechanism as well as the assembly process of monodispersed microspheres self-assembly in a capillary has been investigated. By the vertical self-assembly method, hollow cylindrical polystyrene opals and silica inverse opals of different radii have been made in capillaries; whereas cylindrical solid opals and inverse opals have been prepared under the interactions of gravity sedimentation, evaporation induced micro-flow, liquid surface tension and capillary tension. The growth process of producing solid photonic crystals in capillaries have been described and discussed. By scanning electron microscope, we characterize the internal structure of the samples and with spectrometer we test the reflection spectra of these films. Results show that the substrate curvature radius and microsphere size are the main factors that affect the quality of hollow cylindrical opal and inverse opal films while microsphere size has influence on the internal structure of solid cylindrical opals and inverse opals.