Quantitative measurements of absolute dielectrophoretic forces using optical tweezers

Optical tweezers were used for quantitative measurement of the absolute dielectrophoresis (DEP) forces acting on polystyrene microparticles. The electrodes and tweezers were configured to create one-dimensional DEP forces acting perpendicular to the tweezers' beam. The influences of various ext...

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Bibliographic Details
Published in:Optics letters 2010-07, Vol.35 (14), p.2493-2495
Main Authors: HONG, Yoochan, PYO, Jin-Woo, SANG HYUN BAEK, SANG WOO LEE, DAE SUNG YOON, NO, Kwangsoo, KIM, Beop-Min
Format: Article
Language:English
Subjects:
Electrodes
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mechanical effects of light on atoms, molecules, electrons, and ions
Mechanical Phenomena
Mechanics
Optical Tweezers
Optics
Particle Size
Physical Phenomena
Physics
Polystyrenes - chemistry
Quantum optics
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Summary:Optical tweezers were used for quantitative measurement of the absolute dielectrophoresis (DEP) forces acting on polystyrene microparticles. The electrodes and tweezers were configured to create one-dimensional DEP forces acting perpendicular to the tweezers' beam. The influences of various external factors, such as applied voltage frequency, conductivity of the medium, and particle size on the measurement were estimated. By accounting for these factors, actual measurements were in close agreement with theoretical predictions. Our results show that the optical tweezers may serve as a unique tool for the measurement of DEP forces in various applications.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.35.002493