衬底对ZnO纳米结构形貌和性质的影响

Influence of Substrate on Morphologies and Luminescence of ZnO Nanostructures

通过同一次热蒸发实验在三种完全不同的衬底上（石英,铜箔和单晶硅）制备了不同的Zn O纳米结构材料,采用X射线衍射仪,扫描电子显微镜,拉曼光谱仪和光致发光谱仪分别分析Zn O纳米结构材料的形貌和光学性质。结果显示,在3种不同衬底上的样品具有不同的形貌,这些形貌分别是无定形状、梳状和棒状。光致发光谱结果表明,Zn O纳米结构材料在紫外（380~390 nm）、蓝光（470~490 nm）、绿光（500~550 nm）和橙光（610~620 nm）有发光中心带。初步可以判断,衬底的材料类型对Zn O纳米结构和光学特性有非常重要的影响。

Large quantity Zn O nanostructures were fabricated on three completely different kinds of substrates（ quartz,copper and silicon） through once and the same oxidative evaporation. The effects of substrate on the structure,morphology and optical properties of the Zn O nanostructures were investigated by XRD,SEM,Raman spectra and photoluminescence measurements,respectively. The results showed that the Zn O nanostructures on the three different substrates had three different morphologies,including irregular,comb-and rod-like nanostructures. Photoluminescence spectra of these different Zn O nanostructures showed various emission bands centered in ultraviolet（ 380-390 nm）,blue（ 470-490 nm）,green（ 500-550 nm） and orange（ 610-620 nm） region. It is demonstrated that the substrate material significantly affects the morphologies and luminescence properties of Zn O nanostructures.