期刊
CHEMICAL PHYSICS LETTERS
卷 504, 期 1-3, 页码 41-45出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2011.01.040
关键词
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资金
- National Science Foundation [CMMI-0609059]
- Hong Kong Polytechnic University [BB90]
- National Science Foundation
The growth of CuO nanowires (NWs) through direct oxidation of copper is widely utilized. We give further evidence of a short-circuit, grain boundary diffusion mechanism. First, we show enhanced CuO NW growth through oxidizing nanocrystalline Cu. Second, we show the presence of a bi-crystal structure with a Cu rich (1 1 -2)/(0 0 -1) boundary along the entire length of the NW. Our analysis suggests that the growth of CuO NWs occurs via the short-circuit diffusion of Cu ions across the Cu2O layer, followed by short-circuit diffusion along the CuO NW bi-crystal grain boundary and to the NW tip, where subsequent oxidation occurs. (C) 2011 Elsevier B. V. All rights reserved.
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