The theoretical external specific surface area of single- and multi-walled carbon nanotubes and of carbon nanotube bundles is calculated as a function of their characteristics (diameter, number of walls, number of nanotubes in a bundle). The results ~e reported in diagrams and tables useful to correlate the microscopic characteristics and the specific surface area of )amples. The calculated values are in good agreement with the microscopic characteristics and the specific surface area measurements which have been previously reported in the literature. The specific surface area is a macroscopic parameter which can be helpful to adjust the synthesis conditions of carbon nanotubes. @ 2001 Elsevier Science Ltd. All rights reserved.
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CIRIMAT, UMR CNRS 5085/LCMI, Centre Inter-universitatire de Recherche et d'Ingenierie des Materiaux, Universite Paul-Sabatier, F 31062 Toulouse cedex 4, France;