Nondimensional analysis of particle behavior during cross-type optical particle separation

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A nondimensional analysis of particle behavior during cross-type optical particle separation was performed. A new dimensionless number, S, was defined as the ratio of the optical force to the viscous drag force, and the effects of varying S on particle motion were examined. For large S, the particles undergo acceleration, deceleration, and release as they pass through the laser beam. The retention distance is much longer for large S than for small S. In addition, the effects on particle behavior of varying the wavelength of the laser beam, the particle size, and the index of refraction of the particles were investigated. Furthermore, an analytical expression of the retention distance for large S was validated. (C) 2009 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2009-08
Language
English
Article Type
Article
Keywords

CELL-SEPARATION; CHROMATOGRAPHY; MICROPARTICLES; MICROCHANNEL; MOBILITY; SPHERES; REGIME; FORCES; BEAM

Citation

APPLIED OPTICS, v.48, no.22, pp.4291 - 4296

ISSN
0003-6935
DOI
10.1364/AO.48.004291
URI
http://hdl.handle.net/10203/13688
Appears in Collection
ME-Journal Papers(저널논문)
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