Multi-Mode Phonon-Controlled Field Emission from Carbon Nanotubes: Modeling and Experiments

Sinha, N and Mahapatra, DR and Yeow, JTW and Melnik, RVN (2008) Multi-Mode Phonon-Controlled Field Emission from Carbon Nanotubes: Modeling and Experiments. In: Proc. of the 2007 7th IEEE International Conference on Nanotechnology, Hong Kong, August 02-05, 2-5 Aug. 2007, Hong Kong.

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Abstract

The main idea proposed in this paper is that in a vertically aligned array of short carbon nanotubes (CNTs) grown on a metal substrate, we consider a frequency dependent electric field, so that the mode-specific propagation of phonons, in correspondence with the strained band structure and the dispersion curves, take place. We perform theoretical calculations to validate this idea with a view of optimizing the field emission behavior of the CNT array. This is the first approach of its kind, and is in contrast to the the conventional approach where a DC bias voltage is applied in order to observe field emission. A first set of experimental results presented in this paper gives a clear indication that phonon-assisted control of field emission current in CNT based thin film diode is possible.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	field emission;carbon nanotube;electrodynamics;hydrodynamics; phonon;wave propagation;dispersion
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	22 Oct 2011 07:45
Last Modified:	22 Oct 2011 07:45
URI:	http://eprints.iisc.ac.in/id/eprint/41596

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