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Abstract:
Single-walled nitrogen doped nanotubes were prepared using two novel
approaches in an arc-discharge process. In both cases a nitrogen-rich
precursor was introduced into the anode rods together with graphite and
the catalysts. The nitrogen rich precursors were organic and inorganic,
respectively. Both synthesis routes gave nanotubes with a nitrogen
concentration of a maximum of 1%, determined using electron energy loss
spectroscopy (EELS) coupled with transmission electron microscopy
(TEM). All samples were characterized with scanning electron microscopy
(SEM), TEM, and high-resolution transmission electron microscopy
(HRTEM). (C) 2004 Published by Elsevier B.V.
