Nanostructures and self-catalyzed growth of SnO2
Nanostructures and self-catalyzed growth of SnO2
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DOI：
10.1063/1.2060952
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发表时间：
2005-10
影响因子：
3.2
通讯作者：
B. Wang;Y. Yang;Cong Wang;G. Yang
中科院分区：
文献类型：
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作者：
B. Wang;Y. Yang;Cong Wang;G. Yang
采用活性炭和SnO 2粉末的热蒸发法在金覆盖的单晶硅衬底上生长了包括一维纳米线和二维纳米带的SnO 2纳米结构。场发射扫描电子显微镜，X-射线衍射，拉曼光谱，和高分辨率透射电子显微镜被用来识别这些所得的氧化锡纳米结构的形态和结构。基于这些实验分析，我们发现SnO 2纳米晶体在SnO 2纳米线顶部的自催化生长，即，SnO 2纳米线在没有任何催化剂的情况下可以在（110）晶面上自发成核。这些合成的SnO 2纳米结构的生长行为的基础上的气-液-固机制进行了讨论。
SnO2 nanostructures including one-dimensional nanowires and two-dimensional nanobelts have been grown on a gold covered single crystal silicon substrates using thermal evaporation of active carbon and SnO2 powders. Field emission scanning electron microscopy, x-ray diffraction, Raman spectra, and high-resolution transmission electron microscopy are used to identify the morphology and the structure of these resulting SnO2 nanostructures. Based on these experimental analyses, we found self-catalyzed growth of SnO2 nanocrystals on top of SnO2 nanowires, i.e., SnO2 can spontaneously nucleate on the (110) crystalline plane of SnO2 nanowires without any catalyst. The growth behavior of these synthesized SnO2 nanostructures is discussed on the basis of the vapor-liquid-solid mechanism.