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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 |
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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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Received: 21 April 2021
Revised: 07 July 2021
Accepted manuscript online: 30 July 2021
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PACS:
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68.08.Bc
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(Wetting)
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68.03.Hj
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(Liquid surface structure: measurements and simulations)
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68.05.-n
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(Liquid-liquid interfaces)
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| 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). |
Corresponding Authors:
Rui Zhao, Zhongcheng Liang
E-mail: zhaor@njupt.edu.cn;zcliang@njupt.edu.cn
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Cite this article:
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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