Abstract
The growth of monoclinic W18O49 nanowires by heat treatment of a tungsten filament at∼873 K and the decomposition of these nanowires under 200 keV electron irradiation at∼1023 K have been investigated using in situ transmission electron microscopy (TEM). In situ TEMobservation of the growth confirmed the vapor–solid growth mechanism of the monoclinicW18O49 nanowires. In situ irradiation experiments revealed the formation of metallic bcc tungsten from monoclinicW18O49 nanowires under 200 keV electron irradiation.
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