Journal
CHEMISTRY LETTERS
Volume 37, Issue 3, Pages 296-297Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2008.296
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We demonstrate the fabrication of WO3 nanoflakes by dealloying with subsequent thermal oxidation. Sputtered amorphous W0.68Cu0.32 alloy films were dealloyed in HNO3 solution where Cu was selectively removed and W self-assembled into crosslinked cubic phase W nanoflakes. This kind of W nanoflakes was transformed to monoclinic WO3 nanoflakes by thermal oxidation at 500 degrees C. Gas sensor made using the WO3 nanoflakes showed promising NO2-sensing performance.
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