6533b863fe1ef96bd12c78e1

RESEARCH PRODUCT

Magnetic particle mixing with magnetic micro-convection for microfluidics

Guntars KitenbergsGuntars KitenbergsGuntars KitenbergsKaspars E¯rglisRégine PerzynskiRégine PerzynskiAndrejs Cēbers

subject

ConvectionFerrofluidMaterials scienceMagnetic FluidMicrofluidicsMicrofluidicsNanotechnology02 engineering and technologyMagnetic particle inspectionMagnetic micro-convection01 natural scienceslaw.inventionPhysics::Fluid DynamicsDiffusionMixinglaw[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]Diffusion (business)Mixing (physics)010401 analytical chemistryMechanicsLab-on-a-chip021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesElectronic Optical and Magnetic MaterialsMagnetic fieldFerrofluid0210 nano-technology

description

International audience; In this paper we discuss the magnetic micro-convection phenomenon as a tool for mixing enhancement in microfluidics systems in cases when one of the mis-cible fluids is a magnetic particle colloid. A system of a water-based magnetic fluid and water is investigated experimentally under homogeneous magnetic field in a Hele-Shaw cell. Subsequent image analysis both qualitatively and quan-titatively reveals the high enhancement of mixing efficiency provided by this method. The mixing efficiency dependence on the magnetic field and the phys-ical limits is discussed. A suitable model for a continuous-flow microfluidics setup for mixing with magnetic micro-convection is also proposed and justified with an experiment. In addition, possible applications in improving the speed of ferrohydrodynamic sorting and magnetic label or selected tracer mixing in lab on a chip systems are noted.

10.1016/j.jmmm.2014.10.033https://hal.sorbonne-universite.fr/hal-01117158