Electronic state of nitrogen incorporated into CNx nanotubes
Nikolaev Institute of Inorganic Chemistry, SB RAS, pr. Ak.
Lavrentieva 3, Novosibirsk 630090, Russia
2 Samsung Advanced Institute of Technology, PO Box 111, Suwon 440-600, Korea
3 Boreskov Institute of Catalysis, SB RAS, pr. Ak. Lavrentieva 5, Novosibirsk 630090, Russia
Corresponding author: a firstname.lastname@example.org
Published online: 13 July 2005
CNx nanotubes have been prepared by acetonitrile decomposition over Ni, Co and Ni/Co catalysts. X-ray photoelectron spectroscopy study on the samples revealed a change of nitrogen concentration and shape of N 1s line with variation of the catalyst used. Quantum-chemical calculations on tube fragments showed the energy of N 1s level depends on the atomic structure of carbon tube and kind of incorporated nitrogen. The largest binding energies were found to be characteristic of three-coordinated nitrogen atoms doping the zigzag and chiral carbon nanotubes.
PACS: 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 71.23.An – Theories and models; localized states / 79.60.-i – Photoemission and photoelectron spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005