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Journal of Nanomaterials
Volume 2011, Article ID 268508, 8 pages
Research Article

The Synthesis of Highly Aligned Cupric Oxide Nanowires by Heating Copper Foil

1Department of Frontier Materials, Nagoya Institute of Technology, Nagoya 4668555, Japan
2Department of Electrical and Electronics Engineering, Nagoya Institute of Technology, Nagoya 4668555, Japan

Received 16 June 2011; Revised 8 August 2011; Accepted 22 August 2011

Academic Editor: Yanqiu Zhu

Copyright © 2011 Jianbo Liang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We have investigated the effects of grain size and orientation of copper substrates for the growth of cupric oxide nanowires by thermal oxidation method. Long, less-roughness, high-density, and aligned cupric oxide nanowires have been synthesized by heating (200) oriented copper foils with small grain size in air gas. Long and aligned nanowires of diameter around 80 nm can only be formed within a short temperature range from 400 to 700°C. On the other hand, uniform, smooth-surface, and aligned nanowires were not formed in the case of larger crystallite size of copper foils with (111) and (200) orientation. Smaller grain size of copper foil with (200) orientation is favorable for the growth of highly aligned, smooth surface, and larger-diameter nanowires by thermal oxidation method.