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Issue 15, 2008
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Electrochemical/chemical synthesis of nanostructured arrays of oxide cones or rings

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Abstract

Quasi-periodic supported arrays of sub-micron sized cones and rings consisting of mixed oxides of Al and Ta have been synthesized by anodization of Al(top)/Ta(bottom) bilayers sputtered on Si substrates and successive etching of the Al oxide and remaining Al-rich features. Exquisite control over the array morphology—cones or rings—is achieved by varying the thickness of the initial Ta layer, in the range of 5 to 50 nm. The nano-cones are formed by the Ta oxide fingering out of the Al oxide as a consequence of the higher mobility of Ta ions, leaving behind a ring with its center exposing the bare substrate.

Graphical abstract: Electrochemical/chemical synthesis of nanostructured arrays of oxide cones or rings

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Article information


Submitted
11 Dec 2007
Accepted
15 Feb 2008
First published
12 Mar 2008

J. Mater. Chem., 2008,18, 1741-1746
Article type
Communication

Electrochemical/chemical synthesis of nanostructured arrays of oxide cones or rings

J. Gong, W. H. Butler and G. Zangari, J. Mater. Chem., 2008, 18, 1741
DOI: 10.1039/B719097B

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