FABRICATION OF ALUMINA NANOWIRES FROM POROUS ALUMINA MEMBRANES BY ETCHING IN PHOSPHORIC ACID SOLUTION

Xuehua Wang (), Chengyong Li, Lianjiao Ma, Hong Cao and Baohua Zhang
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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

Surface Review and Letters (SRL), 2009, vol. 16, issue 01, 73-78

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.

Keywords: Alumina nanowires; porous alumina membrane; chemical etching (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012317

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