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采用纳米球刻蚀(nanosphere lithography)技术,以自组装的聚苯乙烯纳米小球(polystyrene,PS小球)的单层膜为掩模,制备出二维有序的CdS纳米阵列.利用扫描电子显微镜(SEM)对样品结构进行了表征,用紫外—可见分光光度计对样品光学性质进行了分析.结果表明:制备的二维CdS纳米阵列是高度有序的,且与作为掩模的纳米小球的原始尺寸及排布结构一致;禁带宽度为2.60eV,相对于体材料的2.42eV,向短波长蓝移了0.18eV,表现出CdS材料在纳米结构点阵中的量子尺寸效应;CdS纳米阵列在长波段透光性较好,短波段透光性几乎为零,表现出良好的光透选择性.
A two-dimensionally ordered CdS nano-array was prepared by nanosphere lithography using a single layer of self-assembled polystyrene (PS) spheres as a mask. Scanning electron The structure of the sample was characterized by SEM, and the optical properties of the sample were analyzed by UV-Vis spectrophotometer.The results showed that the prepared CdS nanostructures were highly ordered and closely related to the size of nano-sized The original size and arrangement of the balls were the same. The band gap was 2.60eV, which was shifted to the short wavelength by 0.18eV with respect to the bulk material at 2.42eV, indicating the quantum size effect of CdS in the nanostructured lattice. CdS The nano-array has better light transmission in the long wavelength band, almost zero transmission in the short wave band, and shows good light transmission selectivity.