Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2430918
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Heteroepitaxy of vertically well-aligned ZnO nanowall networks with a honeycomblike pattern on GaN/c-Al2O3 substrates by the help of a Au catalyst was realized. The ZnO nanowall networks with wall thicknesses of 80-140 nm and an average height of about 2 mu m were grown on a self-formed ZnO thin film during the growth on the GaN/c-Al2O3 substrates. It was found that both single-crystalline ZnO nanowalls and catalytic Au have an epitaxial relation to the GaN thin film in synchrotron x-ray scattering experiments. Hydrogen-sensing properties of the ZnO nanowall networks have also been investigated. (c) 2007 American Institute of Physics.
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