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应用湿化学方法,在SiO2微球表面先后包覆5nm银层、20nmSiO2介质膜,制备了直径约300nm的单分散SiO2/Ag/SiO2核壳结构微球。用提拉技术实现微球的自组装,获得了长程有序的面心立方结构排列的光子晶体,并研究了其光学性能。结果表明:在可见至近红外波段存在非完全光子带隙;SiO2/Ag/SiO2球体自组装成的光子晶体并非完全密堆排列。
Abstract：Multilayer-coated core-shell structural monodisperse spheres of SiO2/Ag/SiO2 with 300 nm in diameter were fabricated for photonic crystal application by depositing a 5 nm silver layer and a 20 nm silica layer respectively on the surface of submicron silica spheres via a wet chemistry process. High quality photonic crystals with face-centered cubic structure were self-assembled with a pulling method and their optical properties were also studied. The results show that a directional photonic band gap can be observed at visible and near infrared wavelengths. The SiO2/Ag/SiO2 core-shell spheres are not close assembled into photonic crystals.
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基本信息:
中图分类号:O734
引用信息:
[1]丁观军,祝名伟,钱国栋,等.单分散SiO_2/Ag/SiO_2核壳结构微球制备及自组装光子晶体[J].硅酸盐学报,2007,No.212(01):81-84.
基金信息:
国家自然科学基金(No.50372059)资助项目。
2007-01-30
2007-01-30