Table of Contents
Journal of Nanoscience
Volume 2014, Article ID 437895, 5 pages
http://dx.doi.org/10.1155/2014/437895
Research Article

Enhancement of Field Emission Properties of Carbon Nanotubes by ECR-Plasma Treatment

1Department of Physics, Jamia Millia Islamia, New Delhi, India
2Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, India
3Department of Physics, Barkatullah University, Bhopal 462 026, India
4M.J.P. Rohilkhand University, Bareilly, Uttar Pradesh, India

Received 25 June 2014; Revised 28 September 2014; Accepted 7 October 2014; Published 27 October 2014

Academic Editor: Ana Benito

Copyright © 2014 Javid Ali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report a significant improvement in electron field emission property of carbon nanotubes film by using an electron cyclotron resonance plasma treatment. Our research results reveal that plasma treatment can modify the surface morphology and enhance the field emission characteristics of carbon nanotubes. Raman spectra indicate that plasma treated CNTs sample has lesser defects. Before plasma treatment, low current density of 6.5 mA/cm2 at 3.0 V/μm and at a high turn-on field of 2.4 V/μm was observed. ECR plasma treated CNTs showed a high current density of 20.0 mA/cm2 at 3.0 V/μm and at a low of 1.6 V/μm. The calculated enhancement factors are 694 and 8721 for ECR-plasma untreated and treated carbon nanotubes, respectively. We found an increase in the enhancement factor and emission current after the ECR-plasma treatment. This may be attributed to creation of geometrical features through the removal of amorphous carbon and catalyst particles.