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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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 |
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DRNTU::Engineering::Materials::Metallic materials Lee, Kwang Hong Wong, Chee Cheong Decoupling two-step anodization in anodic aluminum oxide |
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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. |
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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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1772827009677787136 |