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Proceedings Paper

Computer simulation of electric field analysis for vertically aligned carbon nanotubes (2): electric field on the nanotube apex
Author(s): Hiroshi Shimoyama; Hidekazu Murata; Toshimi Ohye
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Paper Abstract

Vertically-aligned carbon nanotubes (VA-CNT) are extremely attractive for use as field emission sources. The field emission characteristics of VA-CNTs are determined by the electric field strength on the CNT apexes, and therefore depend strongly on the geometrical parameters such as radius of curvature of the CNT apex, an average density of CNTs and non-uniformity of CNT lengths. This paper describes a computer simulation of electric field analysis for VA-CNTs by means of an improved 3D boundary charge method, where the VA-CNTs are modeled by 9X9 CNTs standing vertically on the cathode substrate. We have calculated the electric field strength on the CNT apex for various geometrical parameters of VA-CNTs. It has been found that the electric field on the CNT apex is inversely proportional to the radius of curvature of the CNT apex, and significantly decrease when the CNT density exceeds 100/cm2.

Paper Details

Date Published: 21 December 2001
PDF: 9 pages
Proc. SPIE 4510, Charged Particle Detection, Diagnostics, and Imaging, (21 December 2001); doi: 10.1117/12.451276
Show Author Affiliations
Hiroshi Shimoyama, Meijo Univ. (Japan)
Hidekazu Murata, Meijo Univ. (Japan)
Toshimi Ohye, Meijo Univ. (Japan)


Published in SPIE Proceedings Vol. 4510:
Charged Particle Detection, Diagnostics, and Imaging
Eric Munro; John A. Rouse, Editor(s)

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