Comparative Study of Structure and Permeability of Porous Oxide Films on Aluminum Obtained by Single- and Two-Step Anodization

A comparative study of the structure and transport properties of porous aluminum oxide films obtained by single- and two-step anodization was carried out. It is shown that the oxidation regime significantly affect the number of dead-ended channels, which results in more than twice the variation in m...

Full description

Saved in:
Bibliographic Details
Published in:ACS applied materials & interfaces 2013-08, Vol.5 (16), p.7819-7824
Main Authors: Petukhov, Dmitrii I, Napolskii, Kirill S, Berekchiyan, Mikhail V, Lebedev, Alexander G, Eliseev, Andrey A
Format: Article
Language:English
Subjects:
Aluminum - chemistry
Crystallization
Electrochemistry
Nanostructures - chemistry
Oxides - chemistry
Porosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A comparative study of the structure and transport properties of porous aluminum oxide films obtained by single- and two-step anodization was carried out. It is shown that the oxidation regime significantly affect the number of dead-ended channels, which results in more than twice the variation in membrane permeability. The effect is explained by multiple branching of channels on the initial stages of organization of the porous structure. Branching also occurs on later stages governing mass transport properties of porous anodic alumina films. A model describing transport properties of anodic aluminum oxide membranes based on pore branching on domain boundaries was suggested to fit experimental results of permeance of membranes obtained by both single- and two-step anodization.
ISSN:1944-8244
1944-8252
DOI:10.1021/am401585q