Abstract
Quasi‐aligned W18O49 nanotubes and nanowires with single‐crystalline monoclinic structure were prepared via a physical vapor deposition process. The axes of the nanotubes and nanowires were aligned along the [010] direction. Field‐emission measurement revealed a threshold field of 6.2 V μm–1 for W18O49 nanowire films, indicating the prepared W18O49 nanowires are excellent field emitters.
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