Mechanism of Droplets from Stationary to Moving on Electrowetting-on-dielectric Chips

被引：0
|
作者：
Xu X. [1 ]
Sun L. [2 ]
Zhang Y. [1 ]
Jiang H. [1 ]
机构：
[1] College of Mechanical Engineering, Quzhou University, Quzhou
[2] Robotics & Microsystems Center, Soochow University, Suzhou
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2018年 / 29卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Digital microfluidics; Driving mechanism; Droplet; Electrowetting-on-dielectric mechanism;
D O I：
10.3969/j.issn.1004-132X.2018.24.002
中图分类号：
学科分类号：
摘要：
Aiming at the problems that the moving processes of droplets on electrowetting-on-dielectric chips under electric fields, the mechanism of droplet moving from stillness to motion was studied. Based on the principle of electromagnetic polarization and Clausius-Mosotti equation, the polarization mechanism of solid-liquid interface was analyzed, and the connection between polarization and dielectric constant was established. Then, the electric field was modeled and simulated by means of COMSOL Multiphysics software. The influences of electric field intensity and Maxwell stress tensor on the forces of droplet in the chips were analyzed. In addition, the equation of hydrostatic pressure difference inside the droplets was obtained, and the moving processes and mechanism of droplets were analyzed. Finally, the moving processes of droplet were verified by experiments. © 2018, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2905 / 2911
页数：6
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