Field emission current saturation of aligned carbon nanotube Effect of density and aspect ratio

Patra, SK and Rao, GM (2006) Field emission current saturation of aligned carbon nanotube Effect of density and aspect ratio. In: Journal Of Applied Physics, 100 (2). pp. 4919-4324.

PDF 6.pdf - Published Version Restricted to Registered users only Download (376kB) | Request a copy

Abstract

The investigation of field emission (FE) properties of carbon nanotube film reveals a strong dependency on the density and its aspect ratio. Nonlinearity in the Fowler-Nordheim (F-N) plot has been explained in terms of change in work function of carbon due to heating during FE. A characteristic knee in the F-N plot, separates the linear region from the nonlinear region. I-knee value turns out to be a basic parameter to define the FE process. It has been shown that an optimum density and length of the nanotubes have high efficiency of field emission. An explanation has been given for the phenomena responsible for efficient field emission in short nanotubes.

Item Type:	Journal Article
Publication:	Journal Of Applied Physics
Publisher:	American Instistitute Of Physics
Additional Information:	Copyright of this article belongs to American Instistitute Of Physics.
Keywords:	carbon nanotubes;thin films;electron field emission;work function.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	24 Mar 2009 05:47
Last Modified:	19 Sep 2010 04:55
URI:	http://eprints.iisc.ac.in/id/eprint/17210

Actions (login required)

View Item