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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
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Nanostructured LaB6 field emitter with lowest apical work function.

Han Zhang1, Jie Tang, Jinshi Yuan

  • 1National Institute for Materials Science, Tsukuba 305-0042, Japan.

Nano Letters
|August 19, 2010
PubMed
Summary

Single lanthanum hexaboride (LaB(6)) nanowire field emitters offer superior stability and performance. Different crystal orientations exhibit unique emission properties, with the 001 orientation showing high symmetry and the 012 orientation having the lowest work function.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Lanthanum hexaboride (LaB(6)) nanowires possess desirable properties for field emission applications.
  • Miniature dimensions, low work function, and excellent physical properties make LaB(6) ideal for electron and ion point sources.

Purpose of the Study:

  • To develop a reliable method for fabricating and assembling single LaB(6) nanowire field emitters with controlled crystal orientations.
  • To characterize the atomic arrangement, emission brightness, and field emission stability of these emitters.

Main Methods:

  • Fabrication and assembly of single LaB(6) nanowire field emitters.
  • Characterization using field ion microscopy (FIM) and field emission microscopy (FEM).

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Last Updated: Jun 10, 2026

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

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Published on: July 12, 2016

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
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Published on: July 17, 2015

Preparing a Celadonite Electron Source and Estimating Its Brightness
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Published on: November 5, 2019

Main Results:

  • The 001 oriented LaB(6) nanowire emitter demonstrated the highest field emission symmetry.
  • The 012 oriented LaB(6) nanowire exhibited the lowest apical work function.
  • Single LaB(6) nanowire emitters showed significantly improved field emission stability compared to LaB(6) needle-type and tungsten (W) cold field emitters.

Conclusions:

  • Single LaB(6) nanowire field emitters can be reliably fabricated with controlled crystal orientations.
  • Crystal orientation significantly influences field emission symmetry and work function.
  • LaB(6) nanowire emitters represent a promising advancement in field emission technology due to their enhanced stability.