Rahul Sen, B. C. Satishkumar, A. Govindaraj, K. R. Harikumar, M. K. Renganathan and C. N. R. Rao
Carbon nanotubes containing small amounts of nitrogen are produced by the pyrolysis of aza-aromatics such as pyridine, methylpyrimidine and triazine over cobalt nanoparticles in an Ar atmosphere; good yields of such nanotubes are obtained by carrying out the pyrolysis of a mixture of pyridine and Fe(CO)5 in flowing Ar+H2 .