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Journal of Electron Microscopy 48(4): 339-343 (1999)
© 1999 Oxford University Press

Helicity and inter-tube bonding in bundles of single-walled carbon nanotubes

Hong-Zheng Jin, Rong-Rui He and Jing Zhu*

Electron Microscopy Laboratory, School of Materials Science and Engineering, Tsinghua University Beijing 100084, China

*To whom correspondence should be addressed. E-mail: jzhu{at}mail.tsinghua.edu.cn

The helicity and the packing of single-walled carbon nanotubes (SWNTs) within bundles have been determined by electron nanodiffraction and high-resolution electron microscopy. Only a weak preference for the ‘armchair’ helicity was found. More frequently several chiral and non-chiral were seen to co-exist in a single bundle. The electronic structure of bundles of SWNTs was studied using electron energy-loss spectroscopy. It is proposed that the inter-tube bonding in the bundles be of {pi} character.

Keywords     bundle, SWNT, helicity, hexagonal packing, electronic structure, inter-tube bonding

Received     16 October 1998, accepted 10 March 1999


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