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Journal articles
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.
Cited literature [21 references]
https://hal-cea.archives-ouvertes.fr/cea-01367117
Contributor : Dominique Girard <>
Submitted on : Wednesday, May 10, 2017 - 2:59:50 PM
Last modification on : Friday, July 17, 2020 - 9:26:25 AM
Long-term archiving on: : Friday, August 11, 2017 - 1:42:39 PM
Contributor : Dominique Girard <>
Submitted on : Wednesday, May 10, 2017 - 2:59:50 PM
Last modification on : Friday, July 17, 2020 - 9:26:25 AM
Long-term archiving on: : Friday, August 11, 2017 - 1:42:39 PM
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