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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
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High Performance Field Emitters.

Clare M Collins1, Richard J Parmee1, William I Milne2

  • 1Department of Engineering Electrical Engineering Division University of Cambridge 9 JJ Thomson Avenue CB3 0FA Cambridge UK.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|September 10, 2016
PubMed
Summary
This summary is machine-generated.

This study compared field electron emission in bulk, 1D, and 2D nanomaterials. Results show 1D and 2D nanomaterials offer enhanced field electron emission compared to bulk materials, confirming their potential for advanced applications.

Keywords:
2D materialsaspect ratiofield electron emissionfield enhancementnanomaterials, work function

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Field electron emission is crucial for vacuum electronics and displays.
  • Understanding material properties influencing emission is key for device optimization.
  • Nanomaterials offer unique electronic properties due to their dimensionality.

Purpose of the Study:

  • To empirically compare the field electron emission performance of bulk, 1D, and 2D nanomaterials.
  • To identify correlations between material properties (work function, dimensionality) and emission characteristics.
  • To validate community views on high aspect ratio materials for enhanced emission.

Main Methods:

  • Large-scale meta-analysis of existing experimental data.
  • Comparison of turn-on electric field and maximum current density.
  • Analysis based on emitter dimensionality (bulk, 1D, 2D) and work function.

Main Results:

  • No clear trend observed between work function and emission performance.
  • A significant correlation found between emitter dimensionality and field emission.
  • Bulk materials showed a turn-on field twice as large as 1D and 2D nanomaterials.

Conclusions:

  • Emitter dimensionality, particularly 1D and 2D structures, significantly impacts field electron emission.
  • High aspect ratios and perturbed surface morphologies enhance field electron emission.
  • The findings support the use of 1D and 2D nanomaterials for improved field emitters.