Network array of zinc oxide whiskers
Chen, B. J.
Yu, M. B.
Zhang, X. H.
Chua, S. J.
Date of Issue2005
School of Materials Science and Engineering
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  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.
© 2005 Institute of Physics Publishing. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanotechnology, Institute of Physics Publishing. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1088/0957-4484/16/1/015].