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Carbon Nanotube Electron Sources for Electron Microscopes

Published online by Cambridge University Press:  01 February 2011

Niels de Jonge,
Jim T. Oostveen,
Theo van Rooij,
Myriam Allioux,
Maya Doytcheva,
Monja Kaiser,
Kenneth B. K. Teo,
Rodrigo G. Lacerda and
William I. Milne
Niels de Jonge
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Jim T. Oostveen
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Theo van Rooij
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Myriam Allioux
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Maya Doytcheva
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Monja Kaiser
Affiliation:
Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands.
Kenneth B. K. Teo
Affiliation:
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
Rodrigo G. Lacerda
Affiliation:
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
William I. Milne
Affiliation:
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
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Abstract

High-quality electron sources can be made from individual multi-walled carbon nanotubes. A process was developed allowing the control over 1) the length of the fraction of the nanotube protruding from the support tip, 2) the contact length of the nanotube with the support tip, 3) the diameter of the nanotube. In addition, the cap of the nanotube was closed and the nanotube was cleaned thoroughly. The field emission model successfully describes the electron emission process of these electron sources and the work function is 5.1 eV. The emitters show a highly stable emission, as expected on account of the extremely stable structure of the carbon nanotube.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 858: Symposium HH – Functional Carbon Nanotubes , 2004, HH9.1
Copyright
Copyright © Materials Research Society 2005

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References

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