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High aspect ratio, self‐ordered iron oxide nanopores formed by anodization of Fe in ethylene glycol/NH 4 F electrolytes
Author(s) -
Albu Sergiu P.,
Ghicov Andrei,
Schmuki Patrik
Publication year - 2009
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.200802285
Subject(s) - nanoporous , ethylene glycol , anodizing , electrolyte , nanopore , amorphous solid , annealing (glass) , materials science , oxide , ethylene oxide , inorganic chemistry , chemical engineering , fluoride , ethylene , nanotechnology , chemistry , crystallography , metallurgy , organic chemistry , aluminium , composite material , electrode , catalysis , copolymer , engineering , polymer
In the present work we show that highly self‐ordered iron oxide nanopores can be anodically grown to high aspect ratios, in optimized fluoride‐containing ethylene glycol electrolytes. The as‐formed layers are amorphous and contain a significant amount of fluorides. By annealing the layers can be crystallized and the fluorides can be removed. At elevated electrolyte temperatures the nanoporous system shows a transition to a nanotubular structure. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)