Nanostructured LaB6 field emitter with lowest apical work function

Han Zhang, Jie Tang, Jinshi Yuan, Jun Ma, Norio Shinya, Kiyomi Nakajima, Hideyuki Murakami, Tadakatsu Ohkubo, Lu Chang Qin

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

LaB6 nanowires are ideal for applications as an electrical field-induced ion and electron point source due to their miniature dimensions, low work function, as well as excellent electrical, thermal, and mechanical properties. We present here a reliable method to fabricate and assemble single LaB6 nanowire-based field emitters of different crystal orientations. The atomic arrangement, emission brightness from each crystal plane, and field emission stability have been characterized using field ion microscopy (FIM) and field emission microscopy (FEM). It is found that the 〈001〉 oriented LaB6 nanowire emitter has the highest field emission symmetry while the 〈012〉 oriented LaB6 nanowire has the lowest apical work function. The field emission stability from the single LaB6 nanowire emitter is significantly better than either the LaB6 needle-type emitter or W cold field emitters.

Original languageEnglish
Pages (from-to)3539-3544
Number of pages6
JournalNano Letters
Volume10
Issue number9
DOIs
Publication statusPublished - 2010 Sep 8

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Keywords

  • Electron emission
  • field emission
  • field emission microscopy
  • field ion miscroscopy
  • lanthanum hexaboride
  • nanowire

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Zhang, H., Tang, J., Yuan, J., Ma, J., Shinya, N., Nakajima, K., Murakami, H., Ohkubo, T., & Qin, L. C. (2010). Nanostructured LaB6 field emitter with lowest apical work function. Nano Letters, 10(9), 3539-3544. https://doi.org/10.1021/nl101752z