Dielectrowetting actuation of droplet: Theory and experimental validation |
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Affiliation: | 1.The Microfluidic Optical Technology Research Center, School of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;2.Beijing Institute of Space Mechanics&Electricity, Beijing 100094, China |
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Abstract: | A theoretical model based on energy conversation is constructed to characterize the contracting behavior of the non-conductive droplet actuated by the dielectric effect in an immiscible dielectric liquid. To verify the theory, COMSOL is employed to simulate the evolution of the droplet based on dielectrowetting, and a measurement platform is established to monitor the change process of the droplet profile. The contact angle and the height of the droplet increase linearly up to 48° and 2.03 mm respectively when U ranges from 55 V to 160 V, while the droplet remained stationary when U < 55 V. The relative experimental results coincide with the prediction of theory and the simulation analysis. |
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Keywords: | dielectrowetting contact angle height COMSOL droplet |
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