Mechanism of contact angle saturation and an energy-based model for electrowetting

作     者：赵瑞 梁忠诚 

作者机构：College of Optoelectronic EngineeringCenter of Optofluidic TechnologyNanjing University of Posts and Telecommunications 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2016年第25卷第6期

页      面：360-365页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Project supported by the Fund from the Research Center of Optical Communications Engineering&Technology Jiangsu Province China(Grant No.ZSF0402) 

主　　题：electrowetting contact angle saturation 

摘      要：Electrowetting,as a well-known approach to increasing droplet wettability on a solid surface by electrical bias,has broad applications.However,it is limited by contact angle saturation at large voltage.Although several debated hypotheses have been proposed to describe it,the physical origin of contact angle saturation still remains obscure.In this work,the physical factors responsible for the onset of contact angle saturation are explored,and the correlated theoretical models are established to characterize electrowetting behavior.Combination of the proper 3-phase system employed succeeds in dropping the saturating contact angle below 25？,and validates that the contact angle saturation is not a result of devicerelated imperfection.