Structure and Field-Emission Properties of Sub-Micrometer-Sized Tungsten-Whisker Arrays Fabricated by Vapor Deposition

abstract

Sub-micrometer-sized tungsten-whisker arrays are synthesized by a catalyst- and template-free vapor-deposition process. The resultant whiskers have a hexagonal cross-section, sharp pyramidal tip, and large aspect ratio. The excellent field-emission properties of the whisker arrays, which can be tuned varying the diameters of the synthesized whiskers, are demonstrated.

keywords

SILICON-CARBIDE NANOWIRES; CARBON NANOTUBE FILMS; NANONEEDLE ARRAYS; NANOSTRUCTURES; GROWTH; OXIDE; MOLYBDENUM; EMITTERS

subject category

Chemistry; Science & Technology - Other Topics; Materials Science; Physics

authors

Wang, SL; He, YH; Fang, XS; Zou, J; Wang, Y; Huang, H; Costa, PMFJ; Song, M; Huang, BY; Liu, CT; Liaw, PK; Bando, Y; Golberg, D

Groups

acknowledgements

This study is supported by the National Natural Science Foundation of China (grant nos. 50825102, 50804057, 50721003, 50823006), World Premier International Center for Materials Nanoarchitectonics (MANA) of the National Institute for Materials Science (Japan), Australian Research Council, Australia-China Special Fund (CH060063), and China-Australia Special Fund (50711120183). Supporting Information is available online from Wiley InterScience or from the author.

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