期刊
CURRENT APPLIED PHYSICS
卷 13, 期 7, 页码 1370-1375出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2013.04.015
关键词
Anodization; Zn; Nanowires; Electrochemical study
资金
- Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP) at Inha University
Different behaviors during the formation of ZnO nanowires from a Zn foil by either potentiostatic or galvanostatic anodization are described herein. During the initial stage, 4.5 fold fewer nucleation sites are created in potentiostatic mode than galvanostatic mode. However, the nucleation sites continuously increase as anodization proceeds in the potentiostatic mode, whereas the number of nucleation sites is determined at the beginning of anodization in galvanostatic mode. Overall, the total number of nanowires produced is almost identical. The growth rate of nanowires is 0.04 mu m/s for both modes. Based on the findings during anodization of a Zn foil, a sputtered film of Zn is anodized. In galvanostatic mode, the growth of well-defined nanowires is similar to that observed during anodization of the foil, whereas sparse growth of nanowire bundles is observed in potentiostatic mode. The formation of unevenly grown nanowires is ascribed to the surplus growth species, which are intensively deposited on a few nucleation sites. (C) 2013 Elsevier B.V. All rights reserved.
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