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Nitrates: A new class of electrolytes for the rapid anodic growth of self‐ordered oxide nanopore layers on Ti and Ta
Author(s) -
Wei Wei,
Kirchgeorg Robin,
Lee Kiyoung,
So Seulgi,
Schmuki Patrik
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.201105377
Subject(s) - nanoporous , anodizing , amorphous solid , nanopore , materials science , annealing (glass) , electrolyte , oxide , anodic aluminum oxide , chemical engineering , anode , nanotechnology , metallurgy , crystallography , chemistry , aluminium , fabrication , medicine , alternative medicine , electrode , pathology , engineering
In the present work, we demonstrate that anodization in a nitrate containing organic electrolyte, under specific conditions, can be used to achieve highly aligned nanoporous oxide layers on Ti and Ta substrates. These layers after formation consist of amorphous TiO 2 and Ta 2 O 5 , respectively, with regular pore sizes in the range of 20 to 30 nm. The amorphous layers can easily be crystallized by annealing. A main geometric feature of the layers is that they show a through‐hole morphology which is considered to be of high interest for various types of membrane applications.(© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)