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Degradation and Failure of Field Emitting Carbon Nanotube Arrays

Mahapatra, Roy D and Sinha, N and Melnik, RVN (2011) Degradation and Failure of Field Emitting Carbon Nanotube Arrays. In: Journal of Nanoscience and Nanotechnology, 11 (5). pp. 3911-3915.

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Official URL: http://www.ingentaconnect.com/content/asp/jnn/2011...

Abstract

It has been observed experimentally that the collective field emission from an array of Carbon Nanotubes (CNTs) exhibits fluctuation and degradation, and produces thermal spikes, resulting in electro-mechanical fatigue and failure of CNTs. Based on a new coupled multiphysics model incorporating the electron-phonon transport and thermo-electrically activated breakdown, a novel method for estimating accurately the lifetime of CNT arrays has been developed in this paper. The main results are discussed for CNT arrays during the field emission process. It is shown that the time-to-failure of CNT arrays increases with the decrease in the angle of tip orientation. This observation has important ramifications for such areas as biomedical X-ray devices using patterned films of CNTs.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Field Emission;Carbon Nanotube;Defect;Fatigue;Electrical Breakdown;Phonon;Multiscale Model
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 15 Jun 2011 07:53
Last Modified: 15 Jun 2011 07:53
URI: http://eprints.iisc.ernet.in/id/eprint/38216

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