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1

Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan

2

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan





*

Author to whom correspondence should be addressed.



Abstract 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. View Full-Text

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





Autor: Shih-Hsun Hung 1, Sheng-Chieh Huang 2 and Gwo-Bin Lee 2,*

Fuente: http://mdpi.com/



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