Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/1189
Title: | Flow-induced voltage and current generation in carbon nanotubes |
Authors: | Ghosh, Shankar Sood, A.K. Ramaswamy, Sriram Kumar, N. |
Issue Date: | 22-Nov-2004 |
Publisher: | The American Physical Society |
Citation: | Physical Review B, 2004, Vol.70, 205423 |
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. |
URI: | http://hdl.handle.net/2289/1189 |
ISSN: | 1098-0121 1550-235X (online) |
Alternative Location: | http://link.aps.org/abstract/PRB/v70/e205423 |
Copyright: | (2004) by the American Physical Society |
Appears in Collections: | Research Papers (TP) |
Files in This Item:
File | Description | Size | Format | |
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2004 PRB 70 p205423.pdf | 5p. | 128.59 kB | Adobe PDF | View/Open |
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