Enhancement of field emission characteristics of tungsten emitters by single-walled carbon nanotube modification

D. Ferrer, Takashi Tanii, I. Matsuya, G. Zhong, S. Okamoto, Hiroshi Kawarada, T. Shinada, I. Ohdomari

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    We present a simple method for improving the field emission performance of tungsten-tip electron sources based on single-walled carbon nanotube (SWCNT) modification. By coating a sandwich-like thin film of Al-Fe-Al (with Fe as a catalyst) on a tungsten tip, SWCNTs were synthesized at 600°C in a chemical vapor deposition (CVD) reactor. The influence of CNT modification on the electron emission characteristics of the emitters was investigated by means of a triode structure. We have found that CNT-modified tungsten tips exhibit low threshold-voltage for electron emission, and improved emission-current stability, compared with nonmodified and Al-Fe-Al-coated needles.

    Original languageEnglish
    Article number033116
    Pages (from-to)1-3
    Number of pages3
    JournalApplied Physics Letters
    Issue number3
    Publication statusPublished - 2006


    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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