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RESEARCH PRODUCT
Magnetically enhancing the Seebeck coefficient in ferrofluids.
Michel RogerG. DemouchyG. DemouchyAndrejs CēbersSawako NakamaeRégine PerzynskiM. KouyatéC. L. FilomenoC. L. FilomenoMarco BonettiEmmanuelle DuboisThomas J. SalezThomas J. Salezsubject
FerrofluidMaterials scienceCondensed matter physicsPhysics::Medical PhysicsGeneral EngineeringMaghemiteBioengineering02 engineering and technologyGeneral Chemistryengineering.material010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and Optics0104 chemical sciencesMagnetic fieldPhysics::Fluid DynamicsTemperature gradientNanofluidSeebeck coefficientengineeringMagnetic nanoparticlesGeneral Materials Science0210 nano-technologyConcentration gradientdescription
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 (ST, 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-02-21 | Nanoscale advances |