Thermoelectricity and thermodiffusion in charged colloids

被引：45

作者：

Huang, B. T. ^{[1
]}

Roger, M. ^{[1
]}

Bonetti, M. ^{[1
]}

Salez, T. J. ^{[1
,2
]}

Wiertel-Gasquet, C. ^{[1
]}

Dubois, E. ^{[3
]}

Gomes, R. Cabreira ^{[3
,4
,5
]}

Demouchy, G. ^{[3
,6
]}

Meriguet, G. ^{[3
]}

Peyre, V. ^{[3
]}

Kouyate, M. ^{[3
]}

Filomeno, C. L. ^{[3
,4
,5
]}

Depeyrot, J. ^{[4
,5
]}

Tourinho, F. A. ^{[4
,5
]}

Perzynski, R. ^{[3
]}

Nakamae, S. ^{[1
]}

机构：

[1] CEA Saclay, CEA IRAMIS SPEC, Serv Phys Etat Condense, CNRS,UMR 3680, F-91191 Gif Sur Yvette, France

[2] Ecole Ponts ParisTech, F-77455 Marne La Vallee, France

[3] Univ Paris 06, Sorbonne Univ, CNRS, Lab PHENIX, F-75005 Paris, France

[4] Univ Brasilia, Inst Fis, Grp Fluidos Complexos, BR-70904970 Brasilia, DF, Brazil

[5] Univ Brasilia, Inst Quim, BR-70904970 Brasilia, DF, Brazil

[6] Univ Cergy Pontoise, Dept Phys, F-95011 Cergy Pontoise, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2015年 / 143卷 / 05期

关键词：

TEMPERATURE-GRADIENT; THERMOPHORESIS; FERROFLUIDS; DIFFUSION; LIQUIDS; SPHERES; POWER;

D O I：

10.1063/1.4927665

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Seebeck and Soret coefficients of ionically stabilized suspension of maghemite nanoparticles in dimethyl sulfoxide are experimentally studied as a function of nanoparticle volume fraction. In the presence of a temperature gradient, the charged colloidal nanoparticles experience both thermal drift due to their interactions with the solvent and electric forces proportional to the internal thermoelectric field. The resulting thermodiffusion of nanoparticles is observed through forced Rayleigh scattering measurements, while the thermoelectric field is accessed through voltage measurements in a thermocell. Both techniques provide independent estimates of nanoparticle's entropy of transfer as high as 82 meV K-1. Such a property may be used to improve the thermoelectric coefficients in liquid thermocells. (C) 2015 AIP Publishing LLC.

引用

页数：5

共 38 条

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