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Single-Wall Carbon Nanotubes Field Emission Properties: A Theoretical Study of the Effects of Cs

Published online by Cambridge University Press:  01 February 2011

Brahim Akdim ,
Xiaofeng Duan ,
Donald A. Shiffler  and
Ruth Pachter
Brahim Akdim
Affiliation:
Air Force Research Laboratory, Materials & Manufacturing Directorate, Kirtland Air Force Base, NM.
Xiaofeng Duan
Affiliation:
Aeronautical Systems Center Major Shared Resource Center for High Performance Computing, Wright-Patterson Air Force Base, OH
Donald A. Shiffler
Affiliation:
Air Force Research Laboratory, Directed Energy Directorate, Kirtland Air Force Base, NM.
Ruth Pachter*
Affiliation:
Air Force Research Laboratory, Materials & Manufacturing Directorate, Kirtland Air Force Base, NM.
*
* E-Mail: Ruth.Pachter@wpafb.af.mil
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Abstract

Carbon nanotubes-based materials appeal for explosive emission, in forming cathode plasma, of interest for high-power microwave tubes. Cs intercalation has demonstrated a significant reduction of the work function of carbon nanotubes, thus improving field emission properties. An understanding of the detailed adsorption effects is important because the current saturation is attributed, in part, to adsorption mechanisms. In this paper, we report a density functional theory study of the effects of Cs on field emission of single-wall carbon nanotubes (SWCNTs), as an example of an approach to be taken for a fundamental understanding of such properties.

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