Network array of zinc oxide whiskers

Network array of zinc oxide whiskers

A zinc oxide (ZnO) whisker network array with sixfold symmetry was fabricated on ZnO-buffered (0001) sapphire substrate by the vapour-phase transport method using a mixture o...

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Bibliographic Details
Main Authors:	Chen, B. J., Yu, M. B., Zhang, X. H., Chua, S. J., Xu, Chunxiang, Sun, Xiaowei, Dong, Zhili
Other Authors:	School of Materials Science & Engineering
Format:	Article
Language:	English
Published:	2012
Subjects:	DRNTU::Engineering::Materials
Online Access:	https://hdl.handle.net/10356/95570 http://hdl.handle.net/10220/8282
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Institution:	Nanyang Technological University
Language:	English

Description
Summary:	A zinc oxide (ZnO) whisker network array with sixfold symmetry was fabricated on ZnO-buffered (0001) sapphire substrate by the vapour-phase transport method using a mixture of zinc oxide and graphite powders as source materials and patterned gold as catalyst. From the ZnO buffer layer, hexagonal ZnO nanorods with identical in-plane structure grew epitaxially along the [0001] orientation to form vertical stems. The branches grew horizontally from six side-surfaces of the vertical stem along [01¯10] and other equivalent directions. Most whiskers were confined along the six preferential orientations and interconnected with each other to form a regular network structure. The growth mechanism is discussed.