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Open Access Nano Express

Homoepitaxial regrowth habits of ZnO nanowire arrays

Jian Liu, Shufan Xie, Yanglong Chen, Xianying Wang*, Hongbin Cheng, Fang Liu and Junhe Yang

Author Affiliations

School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China

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Nanoscale Research Letters 2011, 6:619  doi:10.1186/1556-276X-6-619

Published: 7 December 2011

Abstract

Synthetic regrowth of ZnO nanowires [NWs] under a similar chemical vapor transport and condensation [CVTC] process can produce abundant ZnO nanostructures which are not possible by a single CVTC step. In this work, we report three different regrowth modes of ZnO NWs: axial growth, radial growth, and both directions. The different growth modes seem to be determined by the properties of initial ZnO NW templates. By varying the growth parameters in the first-step CVTC process, ZnO nanostructures (e.g., nanoantenna) with drastically different morphologies can be obtained with distinct photoluminescence properties. The results have implications in guiding the rational synthesis of various ZnO NW heterostructures.

Keywords:
ZnO; nanoantenna; photoluminescence; second growth