Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14750
Title: Synthetics of ZnO nanowires on GaN micro-pyramids by gold catalyst
Authors: Xu, CH
Leung, K
Hu, J
Surya, C 
Keywords: Crystal growth
Deposition
Epitaxial growth
Nanomaterials
Semiconductors
Issue Date: 2012
Publisher: Elsevier Science Bv
Source: Materials letters, 2012, v. 74, p. 100-103 How to cite?
Journal: Materials Letters 
Abstract: GaN micro-pyramids were fabricated on n-type CaN buffer layer/c-plane sapphire wafer. In order to understand the growing ZnO on GaN {1-1 0 1} facets, ZnO nanostructures on GaN micro-pyramids with and without Au catalyst were synthesized by chemical vapor deposition (CVD). As-prepared ZnO nanostructures were characterized by a scanning electron microscope (SEM) and a transmission electron microscope (TEM). ZnO nano-sheets on the micro-pyramids without Au catalyst have a terrace-like structure, which is explained by vapor-solid mechanism. ZnO nanowires with a gold particle on the top grow on micro-pyramids with Au catalyst, which is explained by vapor-liquid-solid mechanism. Nanowire bridges crosslinking two adjacent micro-pyramids are frequently observed, which demonstrates the capability to develop self-organizing electrical interconnects and nanoscale devices. The diameters of the resulting ZnO nanowires are in the range of 40-100 nm with typical length about 10 μm.
URI: http://hdl.handle.net/10397/14750
DOI: 10.1016/j.matlet.2011.11.122
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