Abstract
Carbon nanotubes1,2 might be usefully employed in nanometre-scale engineering and electronics. Electrical conductivity measurements on the bulk material3,4, on individual multi-walled5,6 and single-walled7 nanotubes and on bundles of single-walled nanotubes8,9 have revealed that they may behave as metallic, insulating or semiconducting nanowires, depending on the method of productionâwhich controls the degree of graphitization, the helicity and the diameter. Measurements of Young's modulus show10 that single nanotubes are stiffer than commercial carbon fibres. Methods commonly used to generate nanotubesâcarbon-arc discharge techniques1,2,4, catalytic pyrolysis of hydrocarbons11,12 and condensed-phase electrolysis13,14âgenerally suffer from the drawbacks that polyhedral particles are also formed and that the dimensions of the nanotubes are highly variable. Here we describe a method for generating aligned carbon nanotubes by pyrolysis of 2-amino-4,6-dichloro-s-triazine over thin films of a cobalt catalyst patterned on a silica substrate by laser etching. The use of a patterned catalyst apparently encourages the formation of aligned nanotubes. The method offers control over length (up to about 50âμm) and fairly uniform diameters (30â50ânm), as well as producing nanotubes in high yield, uncontaminated by polyhedral particles.
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References
Iijima, S. Helical microtubules of graphitic carbon. Nature 354, 56â58 (1991).
Ebbesen, T. W. & Ajayan, P. M. Large scale synthesis of carbon nanotubes. Nature 358, 220â222 (1992).
De Heer, W. A., Chatelain, A. & Ugarte, D. Acarbon nanotube field-emission electron source. Science 270, 1179â1180 (1995).
Terrones, M. et al. Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials Vol. 2(eds Kadish, K. M. & Ruoff, R. S.) 599â620 (Electrochem. Soc., Pennington, NJ, (1995)).
Dai, H. J., Wong, E. W. & Lieber, C. M. Probing electrical transport in nanomaterials: conductivity of individual carbon nanotubes. Science 272, 523â526 (1996).
Ebbesen, T. W. et al. Electrical conductivity of individual carbon nanotubes. Nature 382, 54â56 (1996).
Tans, S. J. et al. Individual single-wall carbon nanotubes as quantum wires. Nature 386, 474â477 (1997).
Bockrath, M. et al. Single-electron transport in ropes of carbon nanotubes. Science 275, 1922â1925 (1997).
Thess, A. et al. Crystalline ropes of metallic carbon nanotubes. Science 273, 483â487 (1996).
Treacy, M. M. J., Ebbesen, T. W. & Gibson, J. M. Exceptionally high Young's modulus observed for individual nanotubes. Nature 381, 678â680 (1996).
Amelinckx, S. et al. Aformation mechanism for catalytically grown helix-shaped graphite nanotubes. Science 265, 635â639 (1994).
Endo, M. et al. Pyrolytic carbon nanotubes from vapor-grown carbon fibres. Carbon 33, 873â881 (1995).
Hsu, W. K. et al. Condensed-phase nanotubes. Nature 377, 687 (1995).
Hsu, W. K. et al. Electrolytic formation of carbon nanostructures. Chem. Phys. Lett. 261, 161â166 (1996).
Thurston, J. T. et al. Cyanuric chloride derivatives I. Aminochloro-s-triazines. J. Am. Chem. Soc. 73, 2981â2983 (1951).
Chrisey, D. B. & Hubler, G. K. (eds) Pulsed Laser Deposition of Thin Films(Wiley, New York, (1994)).
Terrones, M. et al. Pyrolytically grown BxCyNznanomaterials: nanofibres and nanotubes. Chem. Phys. Lett. 257, 576â582 (1996).
Li, W. Z. et al. Large synthesis of aligned carbon nanotubes. Science 274, 1701â1703 (1996).
Tennent, H. G., Barber, J. J. & Hoch, R. US Patent No. 5578543((1996)).
Hausslein, R. W. Commercial manufacture and uses of carbon nanotubules. 187th Mtg of the Electrochem. Soc. (Abstr.) 175 (Electrochem. Soc., Pennington, NJ, (1995)).
Niu, C., Sichel, E. K., Hoch, R., Moy, D. & Tennent, H. High power electrochemical capacitors based on carbon nanotube electrodes. Appl. Phys. Lett. 70, 1480â1482 (1997).
Acknowledgements
We thank J. Thorpe, D. P. Randall, S. Tehuacanero, R. Hernández, P. MexÃa, R. Guardián and L. Rendón for providing electron microscope facilities, and D. Bernaerts for discussions. We thank CONACYT-México (M.T. and H.T.), the ORS scheme for scholarships (M.T. and W.K.H.), DGAPA-UNAM IN 107-296 (H.T.), EU-TMR grant (J.O.), the Royal Society (London) and the EPSRC for financial support.
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Terrones, M., Grobert, N., Olivares, J. et al. Controlled production of aligned-nanotube bundles. Nature 388, 52â55 (1997). https://doi.org/10.1038/40369
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DOI: https://doi.org/10.1038/40369