Evidence for Adsorbate-Enhanced Field Emission from Carbon Nanotube Fibers (Postprint)

Abstract

We used residual gas analysis (RGA) to identify the species desorbed during field emission (FE) from a carbon nanotube (CNT) fiber. The RGA data show a sharp threshold for H2 desorption at an external field strength that coincides with a breakpoint in the FE data. A comprehensive model for the gradual transition of FE from adsorbate-enhanced CNTs at low bias to FE from CNTs with reduced H2 adsorbate coverage at high bias is developed which accounts for the gradual desorption of the H2 adsorbates, alignment of the CNTs at the fiber tip, and importance of self-heating effects with applied bias.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 2013
Accession Number
ADA597407

Entities

People

  • Benji Maruyama
  • M. Cahay
  • M. Pasquali
  • N. P. Lockwood
  • P. T. Murray
  • Steve B. Fairchild
  • T. C. Back

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Adsorbates
  • Air Force
  • Air Force Research Laboratories
  • Carbon Nanotubes
  • Desorption
  • Electric Fields
  • Electron Microscopy
  • Emission
  • Field Emission
  • Fullerenes
  • Governments
  • Materials
  • Microscopy
  • Partial Pressure
  • Residuals
  • Transitions
  • Work Functions

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Nanocomposite Materials Science