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Received December 6, 2005
Accepted April 2, 2006
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Synthesis of ZnO nanowires on steel alloy substrate by thermal evaporation: Growth mechanism and structural and optical properties

School of Chemical Engineering and Technology, and Nanomaterials Processing Research Centre, Chonbuk National University, Jeonju 561-756, Korea 1Department of Semiconductor Science and Technology, Chonbuk National University, Jeonju 561-756, Korea
Korean Journal of Chemical Engineering, September 2006, 23(5), 860-865(6), 10.1007/BF02705941
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Abstract

ZnO nanowires having a diameter in the range of 15-40 nm and several tens of micrometers in length were grown on steel alloy substrates by the thermal evaporation technique without the use of any catalyst or additives. A detailed structural analysis revealed that the as-grown ZnO nanowires are single crystalline with wurtzite hexagonal structures and preferentially oriented in the c-axis direction. Origination of a strong and sharp Raman-active E2 mode at 436.6 cm.1 indicated that the grown ZnO nanowires have good crystal quality with the hexagonal wurtzite phase. Photoluminescence spectra also exhibited a sharp and strong peak in UV and a suppressed and weak band in the visible region, confirming the good optical properties and less structural defects for the deposited products. Additionally, a systematic growth mechanism is also proposed in detail to acquire a better understanding for the growth of nanowires on steel alloy substrate.

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