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 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.
Hong
Yoochan
Y
Department of Biomedical Engineering, Yonsei University, Wonju, Gangwondo 220-710, Korea.
Pyo
Jin-Woo
JW
Baek
Sang Hyun
SH
Lee
Sang Woo
SW
Yoon
Dae Sung
DS
No
Kwangsoo
K
Kim
Beop-Min
BM
D004566:Electrodes; D055595:Mechanical Phenomena; D019563:Mechanics; D052898:Optical Tweezers; D010316:Particle Size; D055585:Physical Phenomena; D011137:Polystyrenes / Q000737:chemistry
D011137:Polystyrenes