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Determination of the epitaxial growth of zinc oxide nanowires on sapphire by grazing incidence synchrotron x-ray diffraction

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8 Author(s)
Campos, L.C. ; Departamento de Física, Laboratório de Nanomateriais, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 30123-970 Belo Horizonte, MG, Brazil ; Dalal, S.H. ; Baptista, D.L. ; Magalhaes-Paniago, R.
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This letter shows that aligned zinc oxide (ZnO) nanowires growth on sapphire substrates is epitaxial and demonstrates the crystallographic relation between the two using grazing incidence synchrotron x-ray diffraction (XRD). The in-plane lattice match between the sapphire and the nanowires was directly probed by using XRD at grazing angles of incidence, where the lattice match between the (0001) plane of the sapphire and the (11-20) plane of the ZnO were observed simultaneously. It will also be shown that gold acts as a catalyst to initiate ZnO nanowire growth, but it does not interfere with the epitaxial mechanism between the nanowires and the sapphire substrate.

Published in:

Applied Physics Letters  (Volume:90 ,  Issue: 18 )

Date of Publication:

Apr 2007

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