Abstract
Intershell spacings between carbon nanotubes ranging from 3.59 ÅA to 3.62 ÅA, with an uncertainty of ±0.06 ÅA, are deduced by using the in-plane C-C bonding length in the graphene hexagonal network as an internal calibration standard for the digital image analysis of TEM lattice images. These large values imply weak intershell correlation between carbon atoms on adjacent tubules. By using the measured values and the finite number of possible nanotubes, a determination of the chiral vector is made for two shells within a multiwall nanotube. The connection between constraints on and the self-assembly of multilayer carbon nanotubes is discussed.
- Received 18 April 1996
DOI:https://doi.org/10.1103/PhysRevB.54.R12629
©1996 American Physical Society