TiO2-WO3 composite nanotubes by alloy anodization: growth and enhanced electrochromic properties.
The present work demonstrates that uniform and highly ordered arrays of TiO(2)-WO(3) 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 WO(3) (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.
Nah
Yoon-Chae
YC
Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
Ghicov
Andrei
A
Kim
Doohun
D
Berger
Steffen
S
Schmuki
Patrik
P
D000497:Alloys / Q000737:chemistry*; D004583:Electrons; D007477:Ions / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
D000497:Alloys; D007477:Ions; D010087:Oxides; C009495:titanium dioxide; C511604:tungsten oxide; D014025:Titanium; D014414:Tungsten