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Nitrogen‐Doped Carbon Nanotubes: Growth, Mechanism and Structure
Author(s) -
O'Byrne Justin P.,
Li Zhonglai,
Jones Sarah L. T.,
Fleming Peter G.,
Larsson J. Andreas,
Morris Michael A.,
Holmes Justin D.
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100454
Subject(s) - carbon nanotube , cobalt , raman spectroscopy , x ray photoelectron spectroscopy , materials science , catalysis , binding energy , nitrogen , chemical engineering , transmission electron microscopy , carbon fibers , electron energy loss spectroscopy , carbon nanotube supported catalyst , inorganic chemistry , optical properties of carbon nanotubes , doping , nanotechnology , chemistry , nanotube , carbon nanofiber , composite material , organic chemistry , composite number , physics , optoelectronics , engineering , nuclear physics , optics
Nitrogen‐doped bamboo‐structured carbon nanotubes have been successfully grown using a series of cobalt/molybdenum catalysts. The morphology and structure of the nanotubes were analysed by transmission electron microscopy and Raman spectroscopy. The level of nitrogen doping, as determined by X‐ray photoelectron spectroscopy, was found to range between 0.5 to 2.5 at. %. The growth of bamboo‐structured nanotubes in the presence of nitrogen, in preference to single‐walled and multi‐walled nanotubes, was due to the greater binding energy of nitrogen for cobalt in the catalyst compared to the binding strength of carbon to cobalt, as determined by density functional theory.
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