Decoupling two-step anodization in anodic aluminum oxide

It is well known that ordered anodic aluminum oxide (AAO) can be fabricated by a two-step anodization process, but in the current approach, pore size and interpore spacing are coupled because the ordering mechanism is expected to be the same in both steps. Here, we demonstrate that, by using a diffe...

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Main Authors: Lee, Kwang Hong, Wong, Chee Cheong
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2010
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Online Access:https://hdl.handle.net/10356/98366
http://hdl.handle.net/10220/6204
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-983662023-07-14T15:54:41Z Decoupling two-step anodization in anodic aluminum oxide Lee, Kwang Hong Wong, Chee Cheong School of Materials Science & Engineering DRNTU::Engineering::Materials::Metallic materials It is well known that ordered anodic aluminum oxide (AAO) can be fabricated by a two-step anodization process, but in the current approach, pore size and interpore spacing are coupled because the ordering mechanism is expected to be the same in both steps. Here, we demonstrate that, by using a different approach during the second anodization step, we can vary the pore size independently (either shrunk or enlarged), while preserving the ordering of AAO inherited from the first step. This approach is based on changing the electrolyte in the second step, while applying the same voltage as the first step. These results imply that ordering in AAO is strongly dependent on the coupled effect of electrolyte and voltage in the first step, whereas ordering in the second step is only affected by the voltage, quite independent of the electrolyte used. With this decoupling, AAO template processing should become more versatile. Accepted version 2010-03-12T04:54:35Z 2019-12-06T19:54:14Z 2010-03-12T04:54:35Z 2019-12-06T19:54:14Z 2009 2009 Journal Article Lee, K. H., & Wong, C. C. (2009). Decoupling two-step anodization in anodic aluminum oxide. Journal of Applied Physics, (106). 0021-8979 https://hdl.handle.net/10356/98366 http://hdl.handle.net/10220/6204 10.1063/1.3257261 142643 en Journal of applied physics 4 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Metallic materials
spellingShingle DRNTU::Engineering::Materials::Metallic materials
Lee, Kwang Hong
Wong, Chee Cheong
Decoupling two-step anodization in anodic aluminum oxide
description It is well known that ordered anodic aluminum oxide (AAO) can be fabricated by a two-step anodization process, but in the current approach, pore size and interpore spacing are coupled because the ordering mechanism is expected to be the same in both steps. Here, we demonstrate that, by using a different approach during the second anodization step, we can vary the pore size independently (either shrunk or enlarged), while preserving the ordering of AAO inherited from the first step. This approach is based on changing the electrolyte in the second step, while applying the same voltage as the first step. These results imply that ordering in AAO is strongly dependent on the coupled effect of electrolyte and voltage in the first step, whereas ordering in the second step is only affected by the voltage, quite independent of the electrolyte used. With this decoupling, AAO template processing should become more versatile.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Lee, Kwang Hong
Wong, Chee Cheong
format Article
author Lee, Kwang Hong
Wong, Chee Cheong
author_sort Lee, Kwang Hong
title Decoupling two-step anodization in anodic aluminum oxide
title_short Decoupling two-step anodization in anodic aluminum oxide
title_full Decoupling two-step anodization in anodic aluminum oxide
title_fullStr Decoupling two-step anodization in anodic aluminum oxide
title_full_unstemmed Decoupling two-step anodization in anodic aluminum oxide
title_sort decoupling two-step anodization in anodic aluminum oxide
publishDate 2010
url https://hdl.handle.net/10356/98366
http://hdl.handle.net/10220/6204
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