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Evidence for Adsorbate-Enhanced Field Emission from Carbon Nanotube Fibers

Authors
  • Murray, P. T.
  • Back, T. C.
  • Cahay, M. M.
  • Fairchild, S. B.
  • Maruyama, B.
  • Lockwood, N. P.
  • Pasquali, M.
Type
Preprint
Publication Date
Jun 27, 2013
Submission Date
Jun 27, 2013
Identifiers
DOI: 10.1063/1.4817516
Source
arXiv
License
Yellow
External links

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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