Quantitative measurements of absolute dielectrophoretic forces using optical tweezers

Optics Letters
Yoochan HongBeop-Min Kim

Abstract

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.

References

Feb 13, 2001·Biophysical Journal·J VoldmanM A Schmidt
Mar 11, 2006·Journal of Biomedical Optics·Eirini PapagiakoumouAlexander A Serafetinides
Apr 1, 2006·Applied Optics·Karen C VermeulenChristoph F Schmidt
Aug 21, 2009·Biomicrofluidics·Ming-Tzo WeiH Daniel Ou-Yang

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Citations

Feb 24, 2015·Bioanalysis·Fernanda Camacho-Alanis, Alexandra Ros
Jul 21, 2016·Analytical Chemistry·Seungyeop ChoiSang Woo Lee
Aug 18, 2012·Electrophoresis·Hyunjoo ParkH Daniel Ou-Yang
Dec 5, 2019·Biomedical Optics Express·Mehrzad SasanpourS Nader S Reihani

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