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Field Emission Site Densities of Nanostructured Carbon

Published online by Cambridge University Press:  21 March 2011

J B Cui ,
J Robertson  and
W I Milne
J B Cui
Affiliation:
Department of Engineering, Cambridge University, Cambridge CB2 1PZ, UK
J Robertson
Affiliation:
Department of Engineering, Cambridge University, Cambridge CB2 1PZ, UK
W I Milne
Affiliation:
Department of Engineering, Cambridge University, Cambridge CB2 1PZ, UK
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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/μm. 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 675: Symposium W – Nanotubes, Fullerenes, Nanostructured and Disordered Carbon , 2001 , W6.5.1
Copyright
Copyright © Materials Research Society 2001

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References

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