Impact of Pinning of the Triple Contact Line on Electrowetting Performance

被引：51

作者：

Gupta, Rohini ^{[1
]}

Sheth, Danica M. ^{[1
]}

Boone, Teno K. ^{[1
]}

Sevilla, Arianne B. ^{[1
]}

Frechette, Joelle ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA

来源：

LANGMUIR | 2011年 / 27卷 / 24期

基金：

美国国家科学基金会;

关键词：

LIQUID DROPLETS; ACTUATION; DYNAMICS; MODEL; MICROFLUIDICS; VOLTAGE; WATER; HYSTERESIS; ANGLES; LENS;

D O I：

10.1021/la203320g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pinning of the triple contact line adversely affects electrowetting on dielectric. Electrowetting response of substrates with contact angle hysteresis ranging from 1 degrees to 30 degrees has been characterized, and the results are interpreted within the framework of electromechanics corrected for pinning. The relationship between contact angle hysteresis, threshold potential for liquid actuation, and electrowetting hysteresis is quantified. Our results demonstrate that a modified electrowetting equation, based on balance of forces (including the pinning forces) acting on the triple contact line and on the drop, describes the electrowetting response of substrates with significant contact angle hysteresis. Finally, the surface properties of PDMS Sylgard 184 were found to be influenced by the electric field.

引用

页码：14923 / 14929

页数：7

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