Journal
NANO LETTERS
Volume 9, Issue 4, Pages 1350-1355Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl803010v
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- Natural Sciences and Engineering Research Council of Canada
- Alberta Ingenuity Fund (AIF)
- Peter Kruse (McMaster University)
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We report the controlled formation of either high-aspect-ratio Ta2O5 nanotubes; or an organized nanoarray of Ta dimples by Ta anodization in a single H2SO4 + HF solution. Dimpled Ta is the stable surface morphology in the first few seconds, followed by the growth of dense and fully vertically aligned Ta2O5 nanotubes (up to 2.5 mu m long). After 2 min, the dimpled surface morphology reappears, related to the build-up of a resistive Ta fluoride surface layer.
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