XUEHUA WANG () (School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China) CHENGYONG LI (School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China) LIANJIAO MA (School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China) HONG CAO (School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China) BAOHUA ZHANG (Center of Analysis and Test, Wuhan Institute of Technology, Wuhan 430073, China)
Abstract
Alumina nanowires (ANWs) with high aspect ratios were synthesized by the chemical etching of porous alumina membranes (PAMs) in phosphoric acid solution. The morphology and structure of ANWs were analyzed by SEM and XRD, respectively. The results showed that the typical features of ANWs are around 35 nm in diameter and around 20 μm in length, the crystalline structure of the ANWs was amorphous, which was in accordance with that of the PAMs. Furthermore, the morphology of the PAMs was characterized by AFM and SEM in detail. On the basis of AFM and SEM observations, a possible formation mechanism of ANWs was discussed, and the inhomogeneous of the dissolution between the triple points and the side walls was considered to be the essential factor deciding the formation of ANWs.
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Publisher Info
Article provided by World Scientific Publishing Co. Pte. Ltd. in its journal Surface Review and Letters.