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

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL:


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

Repository Staff Only: item control page