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Issue 11, 2005
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Microfluidic capturing-dynamics of paramagnetic bead suspensions

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Abstract

We study theoretically the capturing of paramagnetic beads by a magnetic field gradient in a microfluidic channel treating the beads as a continuum. Bead motion is affected by both fluidic and magnetic forces. The transfer of momentum from beads to the fluid creates an effective bead–bead interaction that greatly aids capturing. We demonstrate that for a given inlet flow speed a critical density of beads exists above which complete capturing takes place.

Graphical abstract: Microfluidic capturing-dynamics of paramagnetic bead suspensions

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Publication details

The article was received on 19 May 2005, accepted on 08 Sep 2005 and first published on 27 Sep 2005


Article type: Paper
DOI: 10.1039/B507104F
Citation: Lab Chip, 2005,5, 1293-1297
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    Microfluidic capturing-dynamics of paramagnetic bead suspensions

    C. Mikkelsen and H. Bruus, Lab Chip, 2005, 5, 1293
    DOI: 10.1039/B507104F

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