Lu Ning, Wan Quanhe, Shi Yu, Zhu Jing
Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084, China.
J Nanosci Nanotechnol. 2010 Nov;10(11):7787-90. doi: 10.1166/jnn.2010.2885.
Freestanding single crystalline zigzag SnO2 nanobelts have been synthesized by a simple thermal evaporation on an iron cylindrical sharp substrate. The heating temperature and Ar gas flow rate are two key points to control the morphology of the nanobelts. The morphology and the microstructure of the nanobelts have been characterized with a number of microscopic techniques. Crystallographic analyses revealed that the zigzag morphology is formed with alternating growth directions between two energy-equal (101) and (101) planes. Moreover, structural and compositional characterization show that the nanobelts do not grow directly on the iron substrate but on the small crystalline grains deposited on the iron oxide columns, which are ascribed to the oxidation of the iron substrate.
通过在铁圆柱尖锐衬底上进行简单的热蒸发，合成了独立的单晶锯齿形SnO₂纳米带。加热温度和氩气流速是控制纳米带形态的两个关键点。已使用多种微观技术对纳米带的形态和微观结构进行了表征。晶体学分析表明，锯齿形形态是在两个能量相等的(101)和(101)平面之间交替生长方向形成的。此外，结构和成分表征表明，纳米带不是直接生长在铁衬底上，而是生长在沉积在氧化铁柱上的小晶粒上，这归因于铁衬底的氧化。
