Magnetically enhancing the Seebeck coefficient in ferrofluids. Issue 8 (20th June 2019)

• Record Type: Journal Article
• Authors: Salez, Thomas J.; Kouyaté, Mansour; Filomeno, Cleber; Bonetti, Marco; Roger, Michel; Demouchy, Gilles; Dubois, Emmanuelle; Perzynski, Régine; Cēbers, Andrejs; Nakamae, Sawako
• Is Part Of: Nanoscale advances. Volume 1:Issue 8(2019)
• Page Start: 2979
• Page End: 2989
• Publication Date: 2019-06-20
• Subjects: 620.5
• DOI: 10.1039/c9na00109c
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : A thermogalvanic cell containing nanofluids under working conditions. Abstract : The influence of the magnetic field on the Seebeck coefficient (Se) was investigated in dilute magnetic nanofluids (ferrofluids) composed of maghemite magnetic nanoparticles dispersed in dimethyl-sulfoxide (DMSO). A 25% increase in the Se value was found when the external magnetic field was applied perpendicularly to the temperature gradient, reminiscent of an increase in the Soret coefficient ( S T, concentration gradient) observed in the same fluids. In-depth analysis of experimental data, however, revealed that different mechanisms are responsible for the observed magneto-thermoelectric and -thermodiffusive phenomena. Possible physical and physico-chemical origins leading to the enhancement of the fluids' Seebeck coefficient are discussed.