Department of Biomedical Engineering, Yonsei University, Wonju, Gangwondo 220-710, Korea.
Opt Lett. 2010 Jul 15;35(14):2493-5. doi: 10.1364/OL.35.002493.
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.
光学镊子用于定量测量作用在聚苯乙烯微球上的绝对介电泳 (DEP) 力。电极和镊子的配置方式可产生垂直于镊子光束的一维 DEP 力。评估了各种外部因素（如施加电压频率、介质电导率和颗粒大小）对测量的影响。通过考虑这些因素，实际测量结果与理论预测非常吻合。我们的研究结果表明，光学镊子可以作为一种独特的工具，用于测量各种应用中的 DEP 力。
