Dramatic Enhancement of the Emission Current Density from Carbon Nanotube Based Nanosize Tips with Extremely Low Onset Fields

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Dramatic Enhancement of the Emission Current Density from Carbon Nanotube Based Nanosize Tips with Extremely Low Onset Fields

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Title: Dramatic Enhancement of the Emission Current Density from Carbon Nanotube Based Nanosize Tips with Extremely Low Onset Fields
Author: HAZRA, KS; RAI, P; MOHAPATRA, DR; KULSHRESTHA, N; BAJPAI, R; ROY, S; MISRA, DS
Abstract: Nanostructures based on multiwalled carbon nanotubes (MWNTs) are fabricated using plasma of the mixture of hydrogen and nitrogen gases. The plasma-sharpened tips of nanotubes contain only a few tubes at the apex of the structure and lead to the dramatic enhancement in the emission current density by a factor >10(6) with the onset field as low as 0.16 V/mu m. We propose that the nature of the tunneling barrier changes significantly for a nanosize tip at very high local electric field and may lead to the saturation in the emission current density.
URI: http://dx.doi.org/10.1021/nn900674e
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3802
http://hdl.handle.net/10054/3802
Date: 2009


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