Structure and Field-Emission Properties of Sub-Micrometer-Sized Tungsten-Whisker Arrays Fabricated by Vapor Deposition (pages 2387–2392)
Shiliang Wang, Yuehui He, Xiaosheng Fang, Jin Zou, Yong Wang, Han Huang, Pedro M. F. J. Costa, Min Song, Baiyun Huang, Chain T. Liu, Peter K. Liaw, Yoshio Bando and Dmitri Golberg
Article first published online: 23 MAR 2009 | DOI: 10.1002/adma.200803401
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.