Journal of Inorganic Materials >
Preparation and Formation Mechanism of Al2O3 Nanowires by Electrochemical Oxidation Process
Received date: 2009-12-17
Revised date: 2010-03-09
Online published: 2010-07-19
Al2O3 nanowires were prepared with the method of electrochemical oxidation followed by acid corrosion. The morphology and structure of Al2O3 nanowires were characterized by SEM, EDS and IR. The experimental results show that Al2O3 nanowires with hexagonal arrangement and large aspect ratio are formed from Al2O3 porous film by electro-oxidation of aluminum substrate. The diameter of the pure Al2O3 nanowires is from 16nm to 60nm, and decreases with the rising of electrolyte temperature, cell voltage and the prolonging of corrosion time. On the basis of characterization of nanowires on Al2O3 porous film, a possible formation mechanism was proposed.
Key words： Al2O3 nanowires; electro-oxidation; preparation; mechanism
CHI Yong-Qing, CHEN Xu, LIU Shi-Bin, ZHANG Zhong-Lin, DUAN Dong-Hong, LI Yi-Bing, HAO Xiao-Gang . Preparation and Formation Mechanism of Al2O3 Nanowires by Electrochemical Oxidation Process[J]. Journal of Inorganic Materials, 2010 , 25(8) : 851 -856 . DOI: 10.3724/SP.J.1077.2010.00851
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