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Raman Characterization of Nitrogen Doped Multiwalled Carbon Nanotubes

  • S. Webster (a1), J. Maultzsch (a2), C. Thomsen (a2), J. Liu (a1), R. Czerw (a1), M. Terrones (a3), F. Adar (a4), C. John (a4), A. Whitley (a4) and D. L. Carroll (a1)...

Abstract

N-type multi-walled nanotubes were synthesized by nitrogen doping using pyridine and pyridine-melamine mixtures in chemical vapor deposition, and their donor states were verified by Scanning Tunneling Spectroscopy. Tunneling Electron Microscopy reveals small amounts of residual catalyst and Scanning Electron Microscopy show well aligned mats of the Nitrogen doped nanotubes. Nitrogen is present in the lattice of these MWNTs as pyridine structures and CNx structures. Raman scattering measurements were performed as a function of increasing growth temperature and the results compared to previously studied boron doped multiwalled nanotubes.

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