Structure and field-emission properties of sub-micrometer-sized Tungsten-whisker arrays fabricated by vapor deposition

Shiliang Wang*, Yuehui He, Xiaosheng Fang, Jin Zou, Yong Wang, Han Huang, Pedro Da Costa, Min Song, Baiyun Huang, Chain T. Liu, Peter K. Liaw, Yoshio Bando, Dmitri Colberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

A study was conducted to investigate the structure and field-emission properties of sub-micrometer-sized tungsten-whisker arrays fabricated by vapor deposition. Scanning electron microscopy (SEM) images revealed that the synthesized whiskers had an average diameter of 180 nm and a length of up to 20 μm. Energy-dispersive spectroscopy (EDS) analyses of the whiskers revealed that they consisted of pure elemental tungsten. Transmission electron microscopy (TEM) was also employed to understand the detailed structural characteristics of the whiskers. TEM images confirmed that they had faceted tips and uniform lateral dimensions along the axial direction. High-resolution TEM (HRTEM) and corresponding selected-area diffraction (SAED) analyses also revealed that the tungsten whiskers were single crystalline with a bcc structure and grew along the (111) directions.

Original languageEnglish (US)
Pages (from-to)2387-2392
Number of pages6
JournalAdvanced Materials
Volume21
Issue number23
DOIs
StatePublished - Jun 19 2009

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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