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首页> 外文期刊>Nanotechnology >Solid Au nanoparticles as a catalyst for growing aligned ZnO nanowires: a new understanding of the vapour-liquid-solid process
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Solid Au nanoparticles as a catalyst for growing aligned ZnO nanowires: a new understanding of the vapour-liquid-solid process

机译：固态金纳米颗粒作为生长取向的ZnO纳米线的催化剂：对汽-液-固过程的新理解

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摘要

X-ray diffraction techniques have been applied to characterize the Au-catalysed growth of aligned ZnO nanowire arrays on an AlGaN/ AlN/ Al2O3 substrate. The orientation relationships between the AlN layer, AlGaN layer, ZnO nanowires and Au particles were determined using x- ray texture analysis. Two orientations of the Au nanoparticles, related by a 30. rotation about the sample normal, were observed. The gold lattice parameter of the ZnO nanowire sample was determined to be the same as that of a control sample never exposed to vaporized ZnO, indicating the absence of Zn in the Au catalyst particles. Our results indicate that the Au catalyst particles were solid during growth, and that growth proceeded by a surface diffusion process, rather than a bulk diffusion process.
机译：X射线衍射技术已应用于表征在AlGaN / AlN / Al2O3衬底上Au催化的取向ZnO纳米线阵列的生长。使用X射线织构分析确定AlN层，AlGaN层，ZnO纳米线和Au颗粒之间的取向关系。观察到金纳米颗粒的两个取向，这与围绕样品法线旋转30°有关。确定ZnO纳米线样品的金晶格参数与从未暴露于汽化ZnO的对照样品的金晶格参数相同，表明Au催化剂颗粒中不存在Zn。我们的结果表明，Au催化剂颗粒在生长过程中是固体，并且生长是通过表面扩散过程而不是本体扩散过程进行的。

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