Nano Archive

Flow-induced voltage and current generation in carbon nanotubes

Ghosh, S. and Sood, A. K. and Ramaswamy, S. and Kumar, N. (2004) Flow-induced voltage and current generation in carbon nanotubes. PHYSICAL REVIEW B, 70 (20). p. 205423. ISSN 10980121

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Official URL: http://prola.aps.org/abstract/PRB/v70/i20/e205423

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:Article
Subjects:Material Science > Functional and hybrid materials
Analytical Science > Nanotechnology for sensing and actuating
Technology > Nanotechnology and energy applications
Material Science > Nanochemistry
Physical Science > Nanophysics
Physical Science > Nano objects
Physical Science > Nanoelectronics
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4380
Deposited By:JNCASR
Deposited On:02 Apr 2009 11:40
Last Modified:02 Apr 2009 11:40

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