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Fabrication and Field Emission Properties of Carbon Nanotube Cathodes

Published online by Cambridge University Press:  10 February 2011

C. Bower ,
O. Zhou ,
W. Zhu ,
A. G. Ramirez ,
G. P. Kochanski  and
S. Jin
C. Bower
Affiliation:
University of North Carolina, Chapel Hill, NC 27599
O. Zhou
Affiliation:
University of North Carolina, Chapel Hill, NC 27599
W. Zhu
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
A. G. Ramirez
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
G. P. Kochanski
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
S. Jin
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
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Abstract

A variety of carbon nanotube films have been fabricated and tested as cold cathodes. A spray deposition technique was developed for processing as-grown bulk nanotubes, both single-walled and multi-walled, into films of randomly oriented nanotubes. Films of randomly oriented multi-walled nanotubes were grown using thermal chemical vapor deposition, and arrays of well-aligned multi-walled nanotubes have been fabricated using a microwave plasma enhanced chemical vapor deposition technique. The emission current-voltage (I-V) characteristics of these nanotube cathodes have been measured. Both multi-walled (random and aligned) and single-walled carbon nanotubes exhibit low turn-on fields (∼ 2 V/μm to generate 1 nA) and threshold fields (< 5 V/μm to generate 10 mA/cm2). Significantly, these cathodes were capable of operation at very large current densities (> 1A/cm2), making them candidates for application in a variety of vacuum microelectronic devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 593: Symposium U – Amorphous & Nanostructured Carbon , 1999 , 215
Copyright
Copyright © Materials Research Society 2000

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References

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