中国物理B ›› 2021, Vol. 30 ›› Issue (10): 106801-106801.doi: 10.1088/1674-1056/ac1926

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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. 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
  • 收稿日期:2021-04-21 修回日期:2021-07-07 接受日期:2021-07-30 发布日期:2021-09-30
  • 通讯作者: Rui Zhao, Zhongcheng Liang E-mail:zhaor@njupt.edu.cn;zcliang@njupt.edu.cn
  • 基金资助:
    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).

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. 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
  • Received:2021-04-21 Revised:2021-07-07 Accepted:2021-07-30 Published:2021-09-30
  • Contact: Rui Zhao, Zhongcheng Liang E-mail:zhaor@njupt.edu.cn;zcliang@njupt.edu.cn
  • Supported by:
    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).

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摘要： 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.

关键词: dielectrowetting, contact angle, height, COMSOL, droplet

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.

Key words: dielectrowetting, contact angle, height, COMSOL, droplet

中图分类号:  (Wetting)

  • 68.08.Bc
68.03.Hj (Liquid surface structure: measurements and simulations) 68.05.-n (Liquid-liquid interfaces)