Self-organized twinning of actuated particles for microfluidic pumping

Self-organized twinning of actuated particles for microfluidic pumping

The motion of monodisperse particle ensembles in fluidic channels actuated by axial magnetic or gravitation forces is studied. Interactions between particles, fluid, and nearby walls induce unforeseen self-organization phenomena. Superparamagnetic microparticles aligned on a channel axis successivel...

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Veröffentlicht in:Applied physics letters 2008-01, Vol.92 (2), p.024104-024104-3
Hauptverfasser: Derks, Roy J. S., Frijns, Arjan J. H., Prins, Menno W. J., Dietzel, Andreas H.
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container_issue 2
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container_title Applied physics letters
container_volume 92
creator Derks, Roy J. S.
Frijns, Arjan J. H.
Prins, Menno W. J.
Dietzel, Andreas H.
description The motion of monodisperse particle ensembles in fluidic channels actuated by axial magnetic or gravitation forces is studied. Interactions between particles, fluid, and nearby walls induce unforeseen self-organization phenomena. Superparamagnetic microparticles aligned on a channel axis successively organize toward a stable polytwin system under constant force conditions. In the absence of repelling particle interactions, full contact twinning is observed for particles driven by gravity. The mechanisms of successive twinning and spacing regulation are explained by a one-dimensional model based on the axis flow profile. Related performance enhancements for particle based microfluidic pumping are discussed.
doi_str_mv 10.1063/1.2834851
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title Self-organized twinning of actuated particles for microfluidic pumping
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