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http://hdl.handle.net/2289/2718| Title: | Carbon Nanotube Flow Sensors |
| Authors: | Ghosh, Shankar Sood, A.K. Kumar, N. |
| Issue Date: | 14-Feb-2003 |
| Publisher: | AAAS |
| Citation: | Science, 2003, Vol.299, p1042-1044 |
| Abstract: | We report that the flow of a liquid on single-walled carbon nanotube bundles induces a voltage in the sample along the direction of the flow. The voltage that was produced fit a logarithmic velocity dependence over nearly six decades of velocity. The magnitude of the voltage depended sensitively on the ionic conductivity and on the polar nature of the liquid. Our measurements suggest that the dominant mechanism responsible for this highly nonlinear response involves a direct forcing of the free charge carriers in the nanotubes by the fluctuating Coulombic field of the liquid flowing past the nanotubes. We propose an explanation based on pulsating asymmetric ratchets. Our work highlights the device potential for nanotubes as sensitive flow sensors and for energy conversion. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/2718 |
| ISSN: | 0036-8075 1095-9203 (Online) |
| Alternative Location: | http://dx.doi.org/10.1126/science.1079080 |
| Copyright: | 2003 AAAS |
| Appears in Collections: | Research Papers (TP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2003 Science V299 p1042.pdf Restricted Access | Restricted Access | 109.1 kB | Adobe PDF | View/Open Request a copy |
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