Numerical Simulation of Optically-Induced Dielectrophoresis Using a Voltage-Transformation-Ratio Model

Sensors

Shih-Hsun Hung²  Sheng-Chieh Huang¹ 

[1] Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan; E-Mail:;Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan; E-Mail:

关键词: optically-induced dielectrophoresis;    numerical simulation;    emulsion droplets;    polystyrene beads;   

DOI  :  10.3390/s130201965

来源: mdpi

【 摘 要 】

Optically-induced dielectrophoresis (ODEP) has been extensively used for the manipulation and separation of cells, beads and micro-droplets in microfluidic devices. With this approach, non-uniform electric fields induced by light projected on a photoconductive layer can be used to generate attractive or repulsive forces on dielectric materials. Then, moving these light patterns can be used for the manipulation of particles in the microfluidic devices. This study reports on the results from numerical simulation of the ODEP platform using a new model based on a voltage transformation ratio, which takes the effective electrical voltage into consideration. Results showed that the numerical simulation was in reasonably agreement with experimental data for the manipulation of polystyrene beads and emulsion droplets, with a coefficient of variation less than 6.2% (n = 3). The proposed model can be applied to simulations of the ODEP force and may provide a reliable tool for estimating induced dielectrophoretic forces and electric fields, which is crucial for microfluidic applications.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.