Atomic structure and electronic properties of single-walled carbon nanotubes

Teri Wang Odom, Jin-Lin Huang, Philip Kim and Charles M. Lieber ()
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Teri Wang Odom: Department of Chemistry and Chemical Biology Harvard University
Jin-Lin Huang: Department of Chemistry and Chemical Biology Harvard University
Philip Kim: Harvard University
Charles M. Lieber: Department of Chemistry and Chemical Biology Harvard University

Nature, 1998, vol. 391, issue 6662, 62-64

Abstract: Abstract Carbon nanotubes1 are predicted to be metallic or semiconducting depending on their diameter and the helicity of the arrangement of graphitic rings in their walls2,3,4,5. Scanning tunnelling microscopy (STM) offers the potential to probe this prediction, as it can resolve simultaneously both atomic structure and the electronic density of states. Previous STM studies of multi-walled nanotubes6,7,8,9 and single-walled nanotubes (SWNTs)10 have provided indications of differing structures and diameter-dependent electronic properties, but have not revealed any explicit relationship between structure and electronic properties. Here we report STM measurements of the atomic structure and electronic properties of SWNTs. We are able to resolve the hexagonal-ring structure of the walls, and show that the electronic properties do indeed depend on diameter and helicity. We find that the SWNT samples exhibit many different structures, with no one species dominating.

Date: 1998
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DOI: 10.1038/34145

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