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Auto‐barrier‐thinning effect under rapid anodization of nanoporous alumina membrane
Author(s) -
Banerjee Arghya Narayan,
Joo Sang W.
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201105207
Subject(s) - anodizing , barrier layer , oxide , nanoporous , electrolyte , ternary operation , materials science , layer (electronics) , etching (microfabrication) , chemical engineering , thinning , metal , chemistry , nanotechnology , composite material , aluminium , metallurgy , electrode , ecology , computer science , engineering , biology , programming language
We have developed a rapid non‐steady anodization technique that leads to an in‐situ auto‐thinning of the barrier layer due to a space charge limited condition that modifies the local fields at the interfaces of the Al‐Al 2 O 3 ‐electrolyte ternary system. Unlike steady‐state growth, in this non‐steady case an unequal movement of the boundaries of barrier takes place which etches the electrolyte‐oxide interface more than the oxide grows at the oxide‐metal interface, leading to a thinner barrier layer and favouring its complete removal via wet‐etching process. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)