期刊
APPLIED SURFACE SCIENCE
卷 257, 期 9, 页码 3893-3897出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2010.11.113
关键词
Nanostructures; Anodizing; Iron oxides; Mossbauer spectroscopy
类别
资金
- Lithuania Science Council Foundation [MIP-67/2010]
We report on the composition and morphology of as-grown anodic oxide films onto the iron surface in an ethylene glycol solution containing some NH4F and H2O by anodizing under direct current bias. Decrease in the content of NH4F and the temperature of electrolyte allow us to form either nanochannel or nanotubular films over a larger potential window, ca. from 30 to 100 V. By this way, the films in thickness of up to 10 mu m have been formed. Mossbauer spectra recorded at room to cryogenic temperatures under conversion electron and transmission modes revealed the formation of lepidocrocite (gamma-FeOOH) film containing some Fe(OH)(2) and/or FeF2 center dot 4H(2)O. An increase in anodizing voltage results in fabrication of more porous and less Fe(II) compounds containing films. (C) 2010 Elsevier B.V. All rights reserved.
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