Thermoelectricity and thermodiffusion in charged colloids - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles Journal of Chemical Physics Year : 2015

Thermoelectricity and thermodiffusion in charged colloids


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.
Fichier principal
Vignette du fichier
Huang_2015_Thermoelectricity.pdf (897.39 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

cea-01367117 , version 1 (10-05-2017)



B. T. Huang, M. Roger, M. Bonetti, T. J. Salez, C. Wiertel-Gasquet, et al.. Thermoelectricity and thermodiffusion in charged colloids. Journal of Chemical Physics, 2015, 143, pp.054902. ⟨10.1063/1.4927665⟩. ⟨cea-01367117⟩
235 View
470 Download



Gmail Facebook X LinkedIn More