Crystalline Ropes of Metallic Carbon Nanotubes
Andreas Theß, Roland Lee, Pavel N. Nikolaev, Hongjie Dai, Pièrre Petit, Chunhui Xu, Young Hee Lee, Seong‐Gon Kim, Andrew Gabriel Rinzler, Daniel T. Colbert, Gustavo E. Scuseria, David Tománek, J. E. Fischer, R. E. Smalley
Science · 1996 · 5,586 citations
Abstract
Fullerene single-wall nanotubes (SWNTs) were produced in yields of more than 70 percent by condensation of a laser-vaporized carbon-nickel-cobalt mixture at 1200degreesC. X-ray diffraction and electron microscopy showed that these SWNTs are nearly uniform in diameter and that they self-organize into "ropes," which consist of 100 to 500 SWNTs in a two-dimensional triangular lattice with a lattice constant of 17 angstroms. The x-ray form factor is consistent with that of uniformly charged cylinders 13.8 +/- 0.2 angstroms in diameter. The ropes were metallic, with a single-rope resistivity of <10(-4) ohm-centimeters at 300 kelvin. The uniformity of SWNT diameter is attributed to the efficient annealing of an initial fullerene tubelet kept open by a few metal atoms; the optimum diameter is determined by competition between the strain energy of curvature of the graphene sheet and the dangling-bond energy of the open edge, where growth occurs. These factors strongly favor the metallic (10,10) tube with C5v symmetry and an open edge stabilized by triple bonds.
Cite this paper
Theß, A., Lee, R., Nikolaev, P. N., Dai, H., Petit, P., Robert, J., Xu, C., Lee, Y. H., Kim, S., Rinzler, A. G., Colbert, D. T., Scuseria, G. E., Tománek, D., Fischer, J. E., & Smalley, R. E. (1996). Crystalline ropes of metallic carbon nanotubes. Science, 273(5274), 483–487. https://doi.org/10.1126/science.273.5274.483
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