L. Most-baker, D. Forro, R. Ugarte, A. Seshadri, H. N. Govindaraj et al., or g solid solutions 268, 845. nanotubes are less than 10 nm in diameter and they are 33 arranged in bundles several tens of micrometers long Starting from an a-solid solution, the increase in reduction Symp 359, 241. temperature from 900 to 1000 °C produces an increase in the 35 supersaturation level in the reduction atmosphere. However, a 36, these powders, Nature amount of nanotubes, probably owing to the higher CH, pp.381-678, 1994.

F. Despres, E. Daguerre, K. T. Lafdi, P. S. Baker, R. B. Harris et al., out the need for further studies, Carbon J. Catal, vol.33, issue.87, pp.30-86, 1993.

W. Ebbesen and P. M. Ajayan, Large-scale synthesis of carbon nanotubes, Nature, vol.358, issue.6383, pp.220-252, 1992.
DOI : 10.1038/358220a0

T. Iijima, K. Ichihashi, A. Hernadi, J. B. Fonseca, and D. Nagy, Single-shell carbon nanotubes of 1-nm diameter, Nature, vol.363, issue.6430, pp.603-644, 1993.
DOI : 10.1038/363603a0