Electrochemical tuning of band structure of single-walled carbon nanotubes probed by in situ resonance Raman scattering

Ghosh, Shankar and Sood, AK and Rao, CNR (2002) Electrochemical tuning of band structure of single-walled carbon nanotubes probed by in situ resonance Raman scattering. In: Journal of Applied Physics, 92 (2). pp. 1165-1167.

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Abstract

In situ resonance Raman scattering of single-walled carbon nanotubes investigated under electrochemical biasing demonstrates that the intensity of the radial breathing mode varies significantly in a nonmonotonic manner as a function of the cathodic bias voltage, but does not change appreciably under anodic bias. The tangential mode is, however, not affected. These results can be quantitatively understood in terms of the changes in the energy gaps between the one-dimensional van Hove singularities in the electron density of states arising possibly due to the alterations in the overlap integral of pi bonds between the p orbitals of the adjacent carbon atoms.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright for this article belongs to American Institute of Physics (AIP).
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	10 Dec 2004
Last Modified:	19 Sep 2010 04:12
URI:	http://eprints.iisc.ac.in/id/eprint/420

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