A Structure Model and Growth Mechanism for Multishell Carbon Nanotubes
- 3 March 1995
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 267 (5202), 1334-1338
- https://doi.org/10.1126/science.267.5202.1334
Abstract
A model that postulates a mixture of scroll-shaped and concentric, cylindrical graphene sheets is proposed to explain the microstructure of graphite multishell nanotubes grown by arc discharge. The model is consistent with the observed occurrence of a relatively small number of different chiral angles within the same tubule. The model explains clustering in a natural way and is consistent with the observation of asymmetric (0002) lattice fringe patterns and with the occurrence of singular fringe spacings larger than c/2 (c is the c parameter of graphite) in such patterns. Anisotropic thermal contraction accounts for the 2 to 3 percent increase in the c parameter of nanotubes, compared with bulk graphite, but is too small to explain the singular fringe spacings. The model also explains the formation of multishell closure domes. Nucleation is attributed to the initial formation of a fullerene "dome."Keywords
This publication has 18 references indexed in Scilit:
- Carbon NanotubesAnnual Review of Materials Science, 1994
- The reciprocal space of carbon tubes: a detailed interpretation of the electron diffraction effectsUltramicroscopy, 1994
- Defects in Carbon NanostructuresScience, 1994
- Interlayer spacings in carbon nanotubesPhysical Review B, 1993
- Single-shell carbon nanotubes of 1-nm diameterNature, 1993
- The three-dimensional of carbon nanotubes by high-resolution electron microscopyChemical Physics Letters, 1993
- Energetics of multilayered carbon tubulesPhysical Review Letters, 1993
- Buckytubes and Derivatives: Their Growth and Implications for Buckyball FormationScience, 1993
- Carbon fibers based onand their symmetryPhysical Review B, 1992
- Helical microtubules of graphitic carbonNature, 1991