Anodic alumina membranes with defined pore diameters and thicknesses obtained by adjusting the anodizing duration and pore opening-widening timeReport as inadecuate




Anodic alumina membranes with defined pore diameters and thicknesses obtained by adjusting the anodizing duration and pore opening-widening time - Download this document for free, or read online. Document in PDF available to download.

Journal of Solid State Electrochemistry

, Volume 15, Issue 11–12, pp 2427–2436

First Online: 23 June 2011Received: 17 March 2011Revised: 04 June 2011Accepted: 06 June 2011

Abstract

The through-hole porous anodic aluminum oxide AAO membranes were fabricated by a simple two-step anodization of aluminum in 0.3 M oxalic acid, 0.3 M sulfuric acid, and 2 wt.% phosphoric acid solutions under different operating conditions followed by the removal of the remaining Al substrate and the pore opening-widening process. The effect of duration of the second anodizing step on the thickness of the porous oxide layer and the influence of other anodizing conditions such as applied voltage, type of electrolyte, and purity of the substrate on the rate of porous oxide growth were discussed in detail. The pore opening procedure for all synthesized membranes was optimized, and the influence of the duration of chemical etching on structural features of AAO membranes, especially pore diameter, was studied. The rate of pore widening was established for AAO membranes formed in various anodizing electrolytes and for different temperatures of 5 wt.% H3PO4 used for alumina dissolution.

KeywordsAnodization Porous alumina Pore widening Nanoporous materials  Download fulltext PDF



Author: Leszek Zaraska - Grzegorz D. Sulka - Marian Jaskuła

Source: https://link.springer.com/







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