In situ TEM observation of the growth and decomposition of monoclinic W(18)O(49) nanowires.
The growth of monoclinic W(18)O(49) nanowires by heat treatment of a tungsten filament at approximately 873 K and the decomposition of these nanowires under 200 keV electron irradiation at approximately 1023 K have been investigated using in situ transmission electron microscopy (TEM). In situ TEM observation of the growth confirmed the vapor-solid growth mechanism of the monoclinic W(18)O(49) nanowires. In situ irradiation experiments revealed the formation of metallic bcc tungsten from monoclinic W(18)O(49) nanowires under 200 keV electron irradiation.
Chen
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Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Ibaraki, Osaka, Japan. chen@uhvem.osaka-u.ac.jp
Mori
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D046529:Microscopy, Electron, Transmission / Q000379:methods*; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
D010087:Oxides; C511604:tungsten oxide; D014414:Tungsten