Identification of Electron Donor States in N-doped Carbon Nanotubes

Details Identification of Electron Donor States in N-doped Carbon Nanotubes Identification of Electron Donor States in N-doped Carbon Nanotubes

2000-11-20

arxiv.org/abs/cond-mat/0011318v1

Physics

Condensed Matter

Materials Science

5 pages, 4 figures, revtex, submitted to PRL

Scientific paper

Nitrogen doped carbon nanotubes have been synthesized using pyrolysis and characterized by Scanning Tunneling Spectroscopy and transmission electron microscopy. The doped nanotubes are all metallic and exhibit strong electron donor states near the Fermi level. Using tight-binding and ab initio calculations, we observe that pyridine-like N structures are responsible for the metallic behavior and the prominent features near the Fermi level. These electron rich structures are the first example of n-type nanotubes, which could pave the way to real molecular hetero-junction devices.

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