化学气相沉积法制备氧化锡自组装纳米结构

采用化学气相沉积法在镀有5-10 nm厚金膜的SiO2衬底上, 通过控制生长条件, 实现了二氧化锡纳米结构的自组装生长, 成功制备出了莲花状和菊花状的二氧化锡自组装纳米结构. 利用扫描电子显微镜、X射线衍射等表征分析手段对样品的表面形貌、结构及成份进行表征和研究. 并在此基础上, 讨论了两种自组装纳米结构的生长机制.

Preparation of Tin Oxide Self-assembly Nanostructures by Chemical Vapor Deposition

Two types of tin oxide self-assembly nanostructures,lotus flower-shaped and chrysanthemum-shaped,were synthesized by chemical vapor deposition method using gold nanoparticles as catalyst.The lotus flower-shaped tin oxide nanostructure comprised a disc with meshes in nanoscale and a thin film of nanowires,whereas the chrysanthemum-shaped tin oxide nanostructure comprised nanowires or nanobelts in a radicalized arrangement.X-ray diffraction spectra indicated that the former was composed of Sn and SnO2 and the latter was composed of only SnO2.By adjusting these two suits of experimental parameters,such as pressure,temperature,flow rate carrier gas or oxygen in the carrier gas,and then characterizing the products with scanning electron microscopy and X-ray diffraction,possible growth mechanism for these two types of self-assembly tin oxide nanostructures was proposed.