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Vapor Phase Growth of ZnO Nanorod–Nanobelt Junction Arrays

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Abstract:

By thermally evaporating a mixture of ZnO, SnO2, and graphite powders at 920 °C, large quantities of ZnO nanorods with typical diameters of 20–30 nm are grown secondarily from the surfaces of the ZnO nanobelts to form a nanorod–nanobelt junction array with interesting structural characteristics. A possible growth mechanism of the ZnO nanorod–nanobelt junction arrays with high surface-to-volume ratio is discussed. The ZnO nanorod–nanobelt junction arrays appear an enhanced visible emission due to the high quantity of the surface defects related to oxygen vacancies. The results reported in this paper would lead to new approaches to control the surface structures of ZnO nanomaterials that are critical for their applications, such as chemical sensors.

Keywords: JUNCTION; NANOBELTS; NANORODS; PHOTOLUMINESCENCE; VAPOR GROWTH; ZNO

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2005.150

Publication date: July 1, 2005

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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