Thermoelectric effect on charged colloids in the Hückel limit.

The European Physical Journal. E, Soft Matter
Julien Morthomas, Alois Würger

Abstract

We study the thermophoretic coefficient D(T) of a charged colloid. The non-uniform electrolyte is characterized in terms of densities and diffusion currents of mobile ions. The hydrodynamic treatment in the vicinity of a solute particle relies on the Hückel approximation, which is valid for particles smaller than the Debye length, a << [Formula: see text] . To leading order in the parameter a/[Formula: see text] , we find that the coefficient D(T) consists of two contributions, a dielectrophoretic term proportional to the permittivity derivative dvarepsilon/dT , and a Seebeck term, i.e., the macroscopic electric field induced by the thermal gradient in the electrolyte solution. Depending on the particle valency, these terms may take opposite signs, and their temperature dependence may result in a change of sign of thermophoresis, as observed in several recent experiments.

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Citations

Jan 16, 2019·The European Physical Journal. E, Soft Matter·Jérôme Burelbach, Holger Stark
Jan 18, 2018·The European Physical Journal. E, Soft Matter·Jérôme BurelbachErika Eiser
May 5, 2020·Nanotechnology·Kiran PrakashSarith P Sathian
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Apr 15, 2019·The Journal of Chemical Physics·Jérôme Burelbach
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Jul 30, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Arghya Majee, Alois Würger
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Jan 8, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Zhihan ChenYuebing Zheng
Feb 27, 2021·Physical Review Letters·Alois Würger
Dec 18, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tanmay GhongeSuman Chakraborty
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Feb 16, 2019·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Xiaolei PengYuebing Zheng
Nov 20, 2021·Chemical Reviews·Zhihan ChenYuebing Zheng

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