电化学沉积制备二氧化钒反蛋白石光子晶体

Fabrication of VO_2 Inverse Opal Photonic Crystal by Electrodeposition

通过电化学沉积方法向PS胶体晶体模板缝隙中填充五氧化二钒，焙烧去除模板后，在真空度小于10^-2Pa，温度510℃下退火12h，得到具有特定应用价值的二氧化钒反蛋白石（opal）光子晶体。用扫描电镜观察样品的微观形貌，用X射线衍射分析样品成份。实验结果表明，通过电化学沉积制备出的二氧化钒反蛋白石光子晶体，相变电阻突变数量级在2～3之间，相变温度62℃左右。

Electrodeposition was used to fill the interstitial space of self-assembly PS colloidal crystallization with V205. After removal of the template, VO2 inverse opal photonic crystal was fabricated by vacuum annealing about 12 h at T=510℃ and constant total pressure below 0. 01 Pa. The morphologies and structure of the samples were characterized by scanning electron microscopy and X-ray diffraction. The results show that the VO2 photonic crystal obtained has ordered porous structure. After phase transition, the resistance of VO2 photonic crystal changes about 10^2 ~ 10^3 orders. The phase transition temperature of VO2 photonic crystal was about 62℃.