Formation of nitrogen doped carbon during arc-discharge of carbon rods in the presence of pyrrole

When the arc vaporization of carbon rods in a helium atmosphere is conducted in the presence of small amounts of pyrrole, not only does one form nitrogen-doped fullerenes, but also the surface of the carbon rods becomes coated with a layer of a nitrogen-doped carbon. X-ray diffraction indicates d sp...

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Bibliographic Details
Published in:Journal of applied physics 1996-11, Vol.80 (9), p.5404-5407
Main Authors: Glenis, S., Nelson, A. J., Labes, M. M.
Format: Article
Language:English
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Summary:When the arc vaporization of carbon rods in a helium atmosphere is conducted in the presence of small amounts of pyrrole, not only does one form nitrogen-doped fullerenes, but also the surface of the carbon rods becomes coated with a layer of a nitrogen-doped carbon. X-ray diffraction indicates d spacing expansion, and x-ray photoelectron spectroscopy confirms that nitrogen doping has occurred at a level of 2.3%. N1s spectra reveal a nonuniformity in the distribution of nitrogen atoms relative to carbon. These data are consistent with a model in which substitution of nitrogen occurs at the domain boundaries of the graphitic particles. A consequence of this doping is a twofold increase in the electrical conductivity of the carbon. The x-ray photoemission results indicate that N incorporation induces a shift of the valence band toward the Fermi level.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.363819