Si/Ge复合纳米结构的制备及表征

摘要

By thermal decomposition of Si and GeO_2 powder, different morphologies of Ge- and Si-based nanomaterials have been obtained at different temperature regions of the substrate, including the octopus-like, feather-like and besom-like nanostructures. Scanning electron microscopy (SEM) provided morphologies of these different nanostructures. Combining transmission electron microscopy (TEM) bright-field images and EDS mapping, the elemental distributions and their microstructures of these nanomaterials were investigated. The growing processes of these nanostructures were also discussed.%以Si和GeO_2为原料,通过简单直接的热蒸发法在衬底的不同温度区域上得到了章鱼状、羽毛球状、拖把状等不同形貌的Si/Ge/O复合纳米结构.利用扫描电镜(SEM)研究了不同衬底区域纳米结构的形态,结合透射电镜(TEM)的明场像和扫描透射(STEM)模式下能谱的面扫描,系统地研究了不同形貌纳米结构的成分分布,并对生长过程进行了探讨.