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

Journal Article · Fri Feb 28 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4866995· OSTI ID:22277973

Kumar, Avshish; Parveen, Shama; Husain, Samina; Ali, Javid; Zulfequar, Mohammad ^[1]; Harsh, ^[2]; Husain, Mushahid ^[1]

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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)

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.

• OSTI ID: 22277973
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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