Field Emission Site Densities of Nanostructured Carbon

Abstract

The field emission properties of nanostructured carbon films deposited by cathodic vacuum arc in a He atmosphere have been studied by measuring the emission currents and the emission site density. The films have an onset field of ^3 V/micrometer. The emission site density is viewed on a phosphor anode and it increases rapidly with applied field. It is assumed that the emission occurs from surface regions with a range of field enhancement factors but with a constant work function. The field enhancement factor is found to have an exponential distribution.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012160

Entities

People

  • J. Robertson
  • Jingbiao Cui
  • W. I. Milne

Organizations

  • University of Cambridge

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Base Pressure
  • Carbon Nanotubes
  • Current Density
  • Curvature
  • Electric Fields
  • Emission
  • Field Emission
  • Fullerenes
  • Gaussian Distributions
  • Graphitic Materials
  • Materials
  • Measurement
  • Micrometers
  • Paper
  • Probability Distributions
  • Technical Information Centers
  • Work Functions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Spectroscopy.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics