Electric tempest in a teacup: The tea leaf analogy to microfluidic blood plasma separation | Zendy

Leslie Y. Yeo | Zendy; James Friend | Zendy; Dian R. Arifin | Zendy

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Electric tempest in a teacup: The tea leaf analogy to microfluidic blood plasma separation

Author(s) -

Leslie Y. Yeo,

James Friend,

Dian R. Arifin

Publication year - 2006

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 - 10.1063/1.2345590

Subject(s) - microfluidics , plasma , stagnation point , mechanics , chemistry , centrifugal force , particle (ecology) , levitation , flow (mathematics) , materials science , nanotechnology , physics , heat transfer , nuclear physics , quantum mechanics , magnet , oceanography , geology

In a similar fashion to Einstein’s tea leaf paradox, the rotational liquid flow induced by ionic wind above a liquid surface can trap suspended microparticles by a helical motion, spinning them down towards a bottom stagnation point. The motion is similar to Batchelor [Q. J. Mech. Appl. Math. 4, 29 (1951)] flows occurring between stationary and rotating disks and arises due to a combination of the primary azimuthal and secondary bulk meridional recirculation that produces a centrifugal and enhanced inward radial force near the chamber bottom. The technology is thus useful for microfluidic particle trapping/concentration; the authors demonstrate its potential for rapid erythrocyte/blood plasma separation for miniaturized medical diagnostic kits.

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