Controllable morphology evolution of electrodeposited ZnO nano/micro-scale structures in aqueous solution
Controllable morphology evolution of electrodeposited ZnO nano/micro-scale structures in aqueous solution
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DOI：
10.1016/j.matdes.2008.07.024
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发表时间：
2009-05
影响因子：
8.4
通讯作者：
Feng Xu;Yi-nong Lu;Yan Xie;Yunfei Liu
中科院分区：
文献类型：
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作者：
Feng Xu;Yi-nong Lu;Yan Xie;Yunfei Liu
这项研究介绍了一种低成本的电沉积方法，可以在ITO玻璃衬底上制备高度定向和定义良好的氧化锌纳米/微米结构，而不需要传统上预制的氧化锌种子层。结果表明，KCl、NaC l和乙二胺(EDA)的加入以及六亚甲基四胺(HMT)的水解导致了氧化锌{101‘0}棱柱面和(0001)端面生长速率的差异，并导致了高度取向的氧化锌棒、花状氧化锌束、纳米线阵列或六方片的形成。分别考察了不同的ClEDA源对氧化锌平板阵列方式的影响以及−浓度对氧化锌棒长宽比的影响。在没有传统的氧化锌晶种预制层的衬底上，电沉积电位对氧化锌晶体的择优取向起着重要的作用。研究了不同结构的氧化锌的室温光致发光特性。此外，还观察到了氧化锌棒和纳米线阵列(0001)生长端面上不同的繁殖方式。在此基础上，提出了氧化锌纳米线的几种生长机制，如层层繁殖方式。
This study introduces a cost-effective electrodeposition route for preparation of highly oriented and well-defined ZnO nano/micro-scale structures on indium tin oxide (ITO) glass substrates without a traditionally pre-prepared layer of ZnO seeds. It was demonstrated that the addition of KCl, NaCl, and ethylenediamine (EDA) and the hydrolysis of hexamethylenetetramine (HMT) pose the difference in growth rates between ZnO {101¯0} prismatic planes and (0001) end plane and lead to the formation of highly oriented ZnO rods, flower-like ZnO bundles, nanowire arrays or hexagonal plates. The effect of different Cl−sources on the array manner of ZnO plates and the effect of concentration of EDA on the aspect ratio of ZnO rods were investigated, respectively. Electrodeposition potential plays an important role in the preferential growth orientation of ZnO crystals on the substrates without a traditionally pre-prepared layer of ZnO seeds. Room temperature photoluminescence (PL) properties of different ZnO structures were also investigated. In addition, different procreation manner on the (0001) growing end planes for ZnO rods and nanowire arrays were observed. On the basis of observation, several growth mechanisms, such as layer-by-layer procreation manner for ZnO nanowires, are suggested.