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Growth sustainability of nanopore channels in anodic aluminum oxide guided with prepatterns
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Cheng, Chuan and Ngan, A. H. W. (2013) Growth sustainability of nanopore channels in anodic aluminum oxide guided with prepatterns. The Journal of Physical Chemistry C, 117 (23). pp. 12183-12190. doi:10.1021/jp4028436 ISSN 1932-7447.
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Official URL: http://dx.doi.org/10.1021/jp4028436
Abstract
Nanoporous anodic aluminum oxide (AAO) has been widely used as a template for fabricating various nanostructured materials; however, the self-organization mechanism that governs the growth stability of nanopore channels has not been clearly understood. In this work, by a comparison of the growth sustainability of nanopore channels guided with focused-ion-beam patterning with numerical simulations based on a kinetics model, we demonstrated that as the acid concentration increases, the pore channel growth can transform from a barrier-type film mode to unstable growth, back to stable growth, and then to unstable growth again, with the growth rate increasing and the barrier layer thickness decreasing. The agreement between experiment and simulation indicates that an electric field alone can be the key driving force for self-organization in AAO.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
Journal or Publication Title: | The Journal of Physical Chemistry C | ||||||
Publisher: | American Chemical Society | ||||||
ISSN: | 1932-7447 | ||||||
Official Date: | 24 May 2013 | ||||||
Dates: |
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Volume: | 117 | ||||||
Number: | 23 | ||||||
Page Range: | pp. 12183-12190 | ||||||
DOI: | 10.1021/jp4028436 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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