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Journal Article

Thermophoresis for a single charged colloidal particle


Golestanian,  Ramin
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Rasuli, S. N., & Golestanian, R. (2005). Thermophoresis for a single charged colloidal particle. Journal of Physics Condensed Matter, 17(14), S1171-S1176. doi:10.1088/0953-8984/17/14/005.

Cite as: http://hdl.handle.net/21.11116/0000-0001-79E4-6
The microscopic mechanism for thermodiffusion or the Ludwig-Soret effect is investigated for a single charged colloidal particle. For the specific example of a charged permeable membrane, the different forces arising from the interplay between electrostatic interaction and entropy are identified and their magnitudes are calculated in both no-salt and salt-saturated limits. The competition between these forces, which is controlled by the salt density, is shown to decide the direction of motion for the colloids. © 2005 IOP Publishing Ltd.