title: Thermoelectricity and thermodiffusion in charged colloids.
abstract: 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.
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: B T
authors.initials: BT
authors.lastname: Huang
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Roger
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Bonetti
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: T J
authors.initials: TJ
authors.lastname: Salez
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Wiertel-Gasquet
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: E
authors.initials: E
authors.lastname: Dubois
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: R
authors.initials: R
authors.lastname: Cabreira Gomes
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: G
authors.initials: G
authors.lastname: Demouchy
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: G
authors.initials: G
authors.lastname: Mériguet
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: V
authors.initials: V
authors.lastname: Peyre
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: M
authors.initials: M
authors.lastname: Kouyaté
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: C L
authors.initials: CL
authors.lastname: Filomeno
authors.affiliation: Grupo de Fluidos Complexos, Instituto de Fisica & Instituto de Quimica, Universidade de Brasília, CP 04478, 70904-970 Brasília (DF), Brazil.
authors.forename: J
authors.initials: J
authors.lastname: Depeyrot
authors.affiliation: Grupo de Fluidos Complexos, Instituto de Fisica & Instituto de Quimica, Universidade de Brasília, CP 04478, 70904-970 Brasília (DF), Brazil.
authors.forename: F A
authors.initials: FA
authors.lastname: Tourinho
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 Place Jussieu, F-75005 Paris, France.
authors.forename: R
authors.initials: R
authors.lastname: Perzynski
authors.affiliation: Service de Physique de l'Etat Condensé, CEA-IRAMIS-SPEC, CNRS, UMR 3680, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Nakamae