Log Number: P149
Abstract Submitted to the    NANOTUBE'04 Conference:

Microscopic and spectroscopic studies of highly nitrogen-doped carbon nanotubes

M. Castignolles1,2, M. Glerup2,3, S. Enouz1, P. Bernier2, A. Loiseau1, and O. Stéphan4

1 Laboratoire d’Etudes des Microstructures, CNRS-ONERA, Chatillon, France
2 Groupe de Dynamique des Phases Condensées, Université Montpellier II, Montpellier, France
3 Grenoble High Magnetic Field Laboratory, MPI-CNRS, Grenoble, France
4 Laboratoire de Physique des Solides, Université Paris

Contact e-mail: casti@onera.fr

We will present a detailed study of highly-nitrogen doped multi-walled nanotubes, with nitrogen concentration up to 25 %. These tubes were synthesized using an aerosol method which is described in ref. [1].

The tubes were characterized by high-resolution transmission electron microscopy (HRTEM) and electron energy loss spectroscopy (EELS). Particular attention will be given to the evolution of the fine structure of the carbon and nitrogen K-edges in the EEL spectra. This is correlated to the concentration and electronic environment of nitrogen in the tubes.

Also, it will be demonstrated that there exist a close relation between the tube morphologies and the spatial distribution of the carbon and nitrogen atoms.

These information have given insight to the growth of these highly-nitrogen doped multi-walled nanotubes and a mechanism will be discussed.

[1] M. Glerup, M. Castignolles, M. Holzinger, G. Hug, A. Loiseau and P. Bernier, Chem. Comm., 2542-2543 (2003)

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