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Seo, Kwanyong
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Experimental and theoretical studies on the structure of N-doped carbon nanotubes: Possibility of intercalated molecular N-2

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Title
Experimental and theoretical studies on the structure of N-doped carbon nanotubes: Possibility of intercalated molecular N-2
Other Titles
Experimental and theoretical studies on the structure of N-doped carbon nanotubes: Possibility of intercalated molecular N2
Author
Choi, Hyun ChulBae, Seung YongPark, JeungheeSeo, KwanyongKim, ChangwookKim, BongsooSong, Ha JinShin, Hyun-Joon
Keywords
X-RAY-ABSORPTION; CHEMICAL-VAPOR-DEPOSITION; BINDING-ENERGY; NEAR-EDGE; NITRIDE; GRAPHITE; TEMPERATURE; JUNCTIONS; NICKEL; GROWTH
Issue Date
2004-12
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.85, no.23, pp.5742 - 5744
Abstract
The concentration distribution and electronic structure of N atoms doped in multiwalled banboo-like carbon nanotubes (CNTs) are examined by photon energy-dependent x-ray photoelectron spectroscopy and x-ray absorption near edge structure. The inner part of the nanotube wall has a higher N concentration and contains molecular N-2 presumably intercalated between the graphite layers. These results are supported by the self-consistent charge-density-functional-based tight-binding calculation of double-walled CNTs, showing that the intercalation of N-2 is energetically possible and the graphite-like N structure conformer becomes more stable when the inner wall is more heavily doped. (C) 2004 American Institute of Physics
URI
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DOI
10.1063/1.1835994
ISSN
0003-6951
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ECHE_Journal Papers
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