Acoustophoresis of Disks

Unlike acoustophoresis of spherical particles, acoustophoresis of disk-shaped particles also shows an acousticradiation torque which induces disk rotations. The present paper aims to study the acoustophoretic dynamics of disks which are exposed to an ultrasonic standing wave in a microfluidic contex...

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Bibliographic Details
Published inPhysics procedia Vol. 70; pp. 21 - 24
Main Authors Leibacher, Ivo, Garbin, Alexander, Hahn, Philipp, Dual, Jürg
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2015
Subjects
acoustic radiation torque
acoustofluidics
non-spherical cells
platelets
Rayleigh disk
ultrasonic standing wave
ultrasonic standing wave
acoustic radiation torque
acoustofluidics
Rayleigh disk
non-spherical cells
platelets
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Summary:Unlike acoustophoresis of spherical particles, acoustophoresis of disk-shaped particles also shows an acousticradiation torque which induces disk rotations. The present paper aims to study the acoustophoretic dynamics of disks which are exposed to an ultrasonic standing wave in a microfluidic context. A numerical model allowed to calculate torques beyond the existing simplified analytical models from literature. Numerical as well as experimental results were found to agree for microfluidic disk-shaped alumina particles of 7.5μm diameter at ultrasonic frequencies around 2MHz.Application potential is expected for acoustophoresis of disk-shaped cells in biomedical devices (e.g. red blood cells in flow cytometers), assembly of disks or micromaterial development.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.08.017