Dielectrowetting actuation of droplet: Theory and experimental validation
Yayan Huang(黄亚俨)1, Rui Zhao(赵瑞)1,†, Zhongcheng Liang(梁忠诚)1,‡, Yue Zhang(张月)2, Meimei Kong(孔梅梅)1, and Tao Chen(陈陶)1
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
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.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61775102) and the Youth Program of the National Natural Science Foundation of China (Grant No. 61905117).
Yayan Huang(黄亚俨), Rui Zhao(赵瑞), Zhongcheng Liang(梁忠诚), Yue Zhang(张月), Meimei Kong(孔梅梅), and Tao Chen(陈陶) Dielectrowetting actuation of droplet: Theory and experimental validation 2021 Chin. Phys. B 30 106801
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