Issue 83, 2017, Issue in Progress

Magnetofluidic micromixer based on a complex rotating magnetic field

Abstract

Rapid and efficient mixing of particles and fluids in a microfluidic system is of great interest for chemical and biochemical analysis. The present paper investigates magnetofluidic mixing induced by a rotating magnetic field from a number of permanent magnets. Numerical simulation shows the complex magnetic field in the mixing chamber. Simulated particle tracing predicts the trajectories of diamagnetic particles in a paramagnetic medium for the different stationary positions of the magnets. The experimentally obtained trajectories show negative magnetophoresis similar to that predicted by the simulation. However, the static configuration of the magnets cannot achieve mixing of the diamagnetic particles. We demonstrated that a rotating magnetic field could yield up to 86% mixing efficiency at a flow rate of 60 μL min−1 using a diluted ferrofluid of only 1% volume concentration.

Graphical abstract: Magnetofluidic micromixer based on a complex rotating magnetic field

Article information

Article type
Paper
Submitted
21 Jul 2017
Accepted
07 Nov 2017
First published
13 Nov 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 52465-52474

Magnetofluidic micromixer based on a complex rotating magnetic field

A. Munaz, H. Kamble, M. J. A. Shiddiky and N. Nguyen, RSC Adv., 2017, 7, 52465 DOI: 10.1039/C7RA08073E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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