Self-organized twinning of actuated particles for microfluidic pumping | Zendy

Roy J. S. Derks | Zendy; Ajh Arjan Frijns | Zendy; M.W.J. Prins | Zendy; Andreas Dietzel | Zendy

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Self-organized twinning of actuated particles for microfluidic pumping

Author(s) -

Roy J. S. Derks,

Ajh Arjan Frijns,

M.W.J. Prins,

Andreas Dietzel

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2834851

Subject(s) - microfluidics , fluidics , crystal twinning , particle (ecology) , mechanics , materials science , superparamagnetism , nanotechnology , flow (mathematics) , classical mechanics , physics , magnetic field , composite material , microstructure , oceanography , magnetization , quantum mechanics , aerospace engineering , geology , engineering

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.

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