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Multi-mode phonon controlled field emission from carbon nanotubes: Modeling and experiments

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4 Author(s)
Sinha, N. ; Dept. of Syst. Design Eng., Univ. of Waterloo, Waterloo, ON ; Mahapatra, D.R. ; Yeow, J.T.W. ; Melnik, R.

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.

Published in:

Nanotechnology, 2007. IEEE-NANO 2007. 7th IEEE Conference on

Date of Conference:

2-5 Aug. 2007