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

Authors

  • Shiliang Wang,

    1. State Key Laboratory for Powder Metallurgy Central South University Changsha, Hunan 410083 (P.R. China)
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  • Yuehui He,

    Corresponding author
    1. State Key Laboratory for Powder Metallurgy Central South University Changsha, Hunan 410083 (P.R. China)
    • State Key Laboratory for Powder Metallurgy Central South University Changsha, Hunan 410083 (P.R. China).
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  • Xiaosheng Fang,

    Corresponding author
    1. World Premier International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan)
    • World Premier International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan).
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  • Jin Zou,

    Corresponding author
    1. Centre for Microscopy and Microanalysis The University of Queensland Brisbane, Queensland 4072 (Australia)
    2. School of Engineering The University of Queensland Brisbane, Queensland 4072 (Australia)
    • Centre for Microscopy and Microanalysis The University of Queensland Brisbane, Queensland 4072 (Australia).
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  • Yong Wang,

    1. School of Engineering The University of Queensland Brisbane, Queensland 4072 (Australia)
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  • Han Huang,

    1. School of Engineering The University of Queensland Brisbane, Queensland 4072 (Australia)
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  • Pedro M. F. J. Costa,

    1. CICECO, Department of Chemistry University of Aveiro 3810-193 Aveiro (Portugal)
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  • Min Song,

    1. State Key Laboratory for Powder Metallurgy Central South University Changsha, Hunan 410083 (P.R. China)
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  • Baiyun Huang,

    1. State Key Laboratory for Powder Metallurgy Central South University Changsha, Hunan 410083 (P.R. China)
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  • Chain T. Liu,

    1. Materials Science and Engineering Department The University of Tennessee Knoxville, TN 37996-2200 (USA)
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  • Peter K. Liaw,

    1. Materials Science and Engineering Department The University of Tennessee Knoxville, TN 37996-2200 (USA)
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  • Yoshio Bando,

    1. World Premier International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan)
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  • Dmitri Golberg

    1. World Premier International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan)
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Abstract

original image

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.

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