Dielectric materials for electrowetting-on-dielectric actuation
Dielectric materials for electrowetting-on-dielectric actuation
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DOI：
10.1007/s00542-009-0933-z
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发表时间：
2010-03-01
影响因子：
2.1
通讯作者：
Tay, Andrew A. O.
中科院分区：
文献类型：
--
作者：
Liu, Hong;Dharmatilleke, Saman;Tay, Andrew A. O.
介绍了典型的电润湿介质（EWOD）驱动的基本构件及其在EWOD机制中的重要性。EWOD实验研究的重点是电介质材料，EWOD器件的性能在很大程度上取决于电介质材料。分析研究了几种典型的聚合物和无机绝缘体作为EWOD电极的介电击穿，在一定的阈值电位下，这是被迫发生在电极和导电液体之间。研究了介质层和周围介质（空气或硅油）中的电击穿，建立了击穿电压随介质厚度变化的数学模型。一些聚合物材料和自组装单分子膜，使用纯水的接触角测量已经进行了证明接触角的可调性和可逆性，分别在EWOD驱动。
The fundamental building blocks of typical electrowetting-on-dielectric (EWOD) actuation and their importance in the EWOD mechanism are introduced and reviewed, respectively. The emphasis in this experimental study of EWOD is on dielectric materials, upon which the performance of EWOD devices is heavily dependent. Dielectric breakdown of several typical polymeric and inorganic insulators employed as dielectrics for EWOD has been analytically investigated, which is forced to occur between the electrodes and conductive liquids under certain threshold potential. The electric breakdown occurring in both dielectric layer and surrounding medium (air or silicon oil) has been studied to build up a mathematical model of breakdown voltage as a function of dielectric thickness. Contact angle measurement of some polymeric materials and self-assembled monolayer using pure water has been carried out to demonstrate the contact angle tunability and reversibility, respectively, upon EWOD actuation.