不同角度蒸发自组装制备SiO2胶体晶体对比分析

分别在基片水平、倾斜和垂直3种不同条件下采用784 nm SiO2微球自组装制备胶体光子晶体。研究了3种不同条件下制备胶体晶体的区别以及各自的优、缺点,对垂直条件下制备样品进行光学性能的表征,简单分析了自组装过程中胶体晶体的成形机理。结果表明:对于微球粒径较大的SiO2胶体晶体的制备,水平条件下适用于制备二维胶体晶体,倾斜和垂直条件下可以获得面积较大、质量较高的三维胶体晶体。

Comparative analysis of SiO_2 colloidal crystals prepared by evaporation self-assembly at different angles

Three different self-assembly methods,including level,oblique and vertical evaporation were used to prepare colloidal photonic crystals with 784 nm SiO2 microspheres. The differences,advantages and disadvantages of colloidal crystals under three preparation conditions were compared,optical properties of the sample prepared under vertical condition were characterized, and the forming mechanism of the self-assembly process of colloidal crystals was analyzed. The results show that for the preparation of larger microsphere size SiO2 colloidal crystals,the level conditions are suitable for the preparation of two-dimensional colloidal crystals,and oblique and vertical conditions can prepare larger,high-quality three-dimensional colloidal crystals.