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Title: Effect of oxygen plasma on field emission characteristics of single-wall carbon nanotubes grown by plasma enhanced chemical vapour deposition system

Field emission properties of single wall carbon nanotubes (SWCNTs) grown on iron catalyst film by plasma enhanced chemical vapour deposition system were studied in diode configuration. The results were analysed in the framework of Fowler-Nordheim theory. The grown SWCNTs were found to be excellent field emitters, having emission current density higher than 20 mA/cm{sup 2} at a turn-on field of 1.3 V/μm. The as grown SWCNTs were further treated with Oxygen (O{sub 2}) plasma for 5 min and again field emission characteristics were measured. The O{sub 2} plasma treated SWCNTs have shown dramatic improvement in their field emission properties with emission current density of 111 mA/cm{sup 2} at a much lower turn on field of 0.8 V/μm. The as grown as well as plasma treated SWCNTs were also characterized by various techniques, such as scanning electron microscopy, high resolution transmission electron microscopy, Raman spectroscopy, and Fourier transform infrared spectroscopy before and after O{sub 2} plasma treatment and the findings are being reported in this paper.
Authors:
; ; ; ;  [1] ;  [2] ;  [1] ;  [3]
  1. Department of Physics, Jamia Millia Islamia (A Central University), New Delhi 110025 (India)
  2. Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi 110025 (India)
  3. (India)
Publication Date:
OSTI Identifier:
22277973
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION SPECTROSCOPY; CARBON NANOTUBES; CATALYSTS; CHEMICAL VAPOR DEPOSITION; CURRENT DENSITY; FIELD EMISSION; FOURIER TRANSFORMATION; FOWLER-NORDHEIM THEORY; IRON; OXYGEN; PLASMA; RAMAN SPECTROSCOPY; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY