TiO2−WO3 Composite Nanotubes by Alloy Anodization: Growth and Enhanced Electrochromic Properties

The present work demonstrates that uniform and highly ordered arrays of TiO2−WO3 nanotubes can be grown by anodization of Ti alloys in an ethylene glycol/fluoride based electrolyte under selected electrochemical conditions. These aligned mixed oxide nanotube structures are highly suitable for enhanc...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2008-12, Vol.130 (48), p.16154-16155
Main Authors: Nah, Yoon-Chae, Ghicov, Andrei, Kim, Doohun, Berger, Steffen, Schmuki, Patrik
Format: Article
Language:English
Subjects:
Alloys - chemistry
Electrons
Ions - chemistry
Microscopy, Electron, Scanning
Nanotubes - chemistry
Nanotubes - ultrastructure
Oxides - chemistry
Titanium - chemistry
Tungsten - chemistry
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Summary:The present work demonstrates that uniform and highly ordered arrays of TiO2−WO3 nanotubes can be grown by anodization of Ti alloys in an ethylene glycol/fluoride based electrolyte under selected electrochemical conditions. These aligned mixed oxide nanotube structures are highly suitable for enhanced electrochromic reactions; in particular we show that already small amounts of WO3 (such as 0.2 at%) present in the tube oxide drastically improve the electrochromic properties (contrast, onset potential, cycling stability) of nanotube layer based devices.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja807106y