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Structure and Field‐Emission Properties of Sub‐Micrometer‐Sized Tungsten‐Whisker Arrays Fabricated by Vapor Deposition
Author(s) -
Wang Shiliang,
He Yuehui,
Fang Xiaosheng,
Zou Jin,
Wang Yong,
Huang Han,
Costa Pedro M. F. J.,
Song Min,
Huang Baiyun,
Liu Chain T.,
Liaw Peter K.,
Bando Yoshio,
Golberg Dmitri
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200803401
Subject(s) - whisker , materials science , whiskers , micrometer , tungsten , field electron emission , chemical vapor deposition , deposition (geology) , nanotechnology , hexagonal crystal system , core (optical fiber) , optoelectronics , composite material , metallurgy , optics , crystallography , paleontology , chemistry , physics , quantum mechanics , sediment , biology , electron
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.