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RESEARCH PRODUCT
Optofluidic microconvection with magnetic nanoparticles: Novel interaction of thermal diffusion and magnetic field
Dmitry ZablotskyMikhail Maiorovsubject
Fluid Flow and Transfer ProcessesMaterials scienceThin layersMechanical EngineeringMicrofluidicsNanoparticle02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsThermal diffusivity01 natural sciences010305 fluids & plasmasMagnetic fieldCoupling (physics)FerromagnetismChemical physics0103 physical sciencesMagnetic nanoparticles0210 nano-technologydescription
Abstract Light-matter interactions are exploited in many applications, whereas superparamagnetic nanoparticles allow to introduce magnetic field control in diverse fluid environments. We study the structure of laser-induced thermal lens in thin layers of ferromagnetic colloid and predict significant magnetoconvective motion around the beam spot. It was found that localized heating depletes/accumulates magnetic nanoparticles in the beam-spot by thermal diffusion and collective magnetic interactions of nanoparticles produce strong microconvective currents. This mode of mass transport can be controlled by magnetic field. We expect the novel magnetosolutal microconvective coupling, which we describe, can be a multifunctional approach for precision optical manipulation and mixing of small fluid volumes using magnetic nanoparticles within integrated microfluidic devices.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-01-01 | International Journal of Heat and Mass Transfer |