Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 481, Issue 1-2, Pages 397-401Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.03.013
Keywords
Zinc oxide; Nanostructures; Arrays; Etching; Photoluminescence
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Funding
- National Natural Science Foundation of China [50502038, 10576036]
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High-density vertically aligned ZnO nanotube arrays were prepared on ITO-coated glass substrates by a simple and facile chemical etching process from electrodeposited ZnO nanorods. The as-prepared nanotubes are single crystal, with hexagonal cross-section, a diameter of about 400 nm and a uniform central pore. Such ZnO nanotube arrays exhibited strong ultraviolet emissions at 372 nm at room temperature but negligibly defect-related visible emissions, indicating their high crystallinity and excellent optical quality. The nanotube formation was rationalized in terms of selective dissolution of the metastable Zn-rich (0 0 1) polar face. It was proposed that the diameters of the ZnO nanorods played a key role in the nanotube formation. (C) 2009 Elsevier B.V. All rights reserved.
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