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Conical beams from open nanotubes

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Abstract

Electron guns are indispensable devices that are widely used in household and industrial appliances. Field electron-emitting sources (which emit electrons by tunnelling effects in electric fields), with their small size, small energy spread, high current density and no requirement for heat, have distinct advantages over thermionic emitters. We have made a field electron emitter from hollow, open-ended carbon nanotubes.

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Figure 1: Transmission electron microscope image of the open end of a multi-walled carbon nanotube.
Figure 2: Field-emission patterns from multi-walled carbon nanotubes.

References

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, Mie University, Tsu 514, Japan

    Yahachi Saito, Koji Hamaguchi & Koichi Hata

  2. National Institute of Materials and Chemical Research, Tsukuba 305, Japan

    Kunio Uchida, Yoshiharu Tasaka, Fumikazu Ikazaki & Motoo Yumura

  3. Institute for Materials Research, Tohoku University, Sendai 980-77, Japan

    Atsuo Kasuya & Yuichiro Nishina

Authors
  1. Yahachi Saito
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  2. Koji Hamaguchi
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  3. Koichi Hata
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  4. Kunio Uchida
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  5. Yoshiharu Tasaka
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  6. Fumikazu Ikazaki
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  7. Motoo Yumura
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  8. Atsuo Kasuya
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  9. Yuichiro Nishina
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Saito, Y., Hamaguchi, K., Hata, K. et al. Conical beams from open nanotubes. Nature 389, 554–555 (1997). https://doi.org/10.1038/39221

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