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Issue 24, 2012
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Origin of long-range orientational pore ordering in anodic films on aluminium

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Abstract

Porous anodic aluminium oxide has a long history of practical application for corrosion protection and coloring. In the last few decades a lot of hi-tech applications of this material have been found owing to the discovery of anodization conditions leading to the formation of highly ordered porous structures with a narrow pore size distribution. Here we show that in-plane orientation of the porous system in anodic films on aluminium is fully determined by the intrinsic crystallographic orientation of the Al substrate. The anisotropy of aluminium oxidation rates on a scalloped metal–oxide interface leads to reorientation of Al spikes in certain directions, which builds up an in-plane orientational order on a macroscopic scale restricted by a crystallite size. This is a unique example of the inheritance of the substrate crystal structure by an amorphous film through a size difference of three orders of magnitude.

Graphical abstract: Origin of long-range orientational pore ordering in anodic films on aluminium

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Publication details

The article was received on 19 Mar 2012, accepted on 24 Apr 2012 and first published on 25 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM31710A
Citation: J. Mater. Chem., 2012,22, 11922-11926

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    Origin of long-range orientational pore ordering in anodic films on aluminium

    K. S. Napolskii, I. V. Roslyakov, A. Yu. Romanchuk, O. O. Kapitanova, A. S. Mankevich, V. A. Lebedev and A. A. Eliseev, J. Mater. Chem., 2012, 22, 11922
    DOI: 10.1039/C2JM31710A

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