Electrothermal flow in Dielectrophoresis of Single-Walled Carbon Nanotubes

Details Electrothermal flow in Dielectrophoresis of Single-Walled Carbon Nanotubes Electrothermal flow in Dielectrophoresis of Single-Walled Carbon Nanotubes

2007-02-23

arxiv.org/abs/cond-mat/0702550v2

Physics

Condensed Matter

Materials Science

5 pages, 4 figures, Submitted to PRB

Scientific paper

10.1103/PhysRevB.76.045419

We theoretically investigate the impact of the electrothermal flow on the dielectrophoretic separation of single-walled carbon nanotubes (SWNT). The electrothermal flow is observed to control the motions of semiconducting SWNTs in a sizeable domain near the electrodes under typical experimental conditions, therefore helping the dielectrophoretic force to attract semiconducting SWNTs in a broader range. Moreover, with the increase of the surfactant concentration, the electrothermal flow is enhanced, and with the change of frequency, the pattern of the electrothermal flow changes. It is shown that under some typical experimental conditions of dielectrophoresis separation of SWNTs, the electrothermal flow is a dominating factor in determining the motion of SWNTs.

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