Flow-induced voltage and current generation in carbon nanotubes

Ghosh, S and Sood, AK and Ramaswamy, S and Kumar, N (2004) Flow-induced voltage and current generation in carbon nanotubes. In: Physical Review B, 70 (20). pp. 205423-1.

PDF e205423.pdf Restricted to Registered users only Download (128Kb) | Request a copy

Abstract

New experimental results, and a plausible theoretical understanding thereof, are presented for the flow-induced currents and voltages observed in single-walled carbon nanotube samples. In our experiments, the electrical response was found to be sublinear – nearly logarithmic – in the flow speed over a wide range, and its direction could be controlled by an electrochemical biasing of the nanotubes. These experimental findings are inconsistent with the conventional idea of a streaming potential as the efficient cause. Here we present Langevin-equation based treatment of the nanotube charge carriers, assumed to be moving in the fluctuating field of ions in the flowing liquid. The resulting Doppler-shifted force-force correlation, as seen by the charge carriers drifting in the nanotube, is shown to give a sublinear response, broadly in agreement with experiments

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:25
URI:	http://eprints.iisc.ernet.in/id/eprint/6352

Actions (login required)

View Item