In traditional electrowetting-on-dielectric (EWOD) devices, droplets are moved about a substrate using electric fields produced by an array of discrete electrodes. In this study, we show that a drop can be driven across a substrate with a localized light beam by exploiting the photoelectrowetting (PEW) effect, a light-activated variant of EWOD. Droplet transport actuated by PEW eliminates the need for electrode arrays and the complexities entailed in their fabrication and control, and offers a new approach for designing lab-on-a-chip applications. We report measurements of the maximum droplet speed as a function of frequency and magnitude of the applied bias, intensity of illumination, volume of the droplet, and viscosity and also introduce a model that reproduces these data.

中文翻译：

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光电湿润驱动的液滴平移

在传统的电介质上电润湿（EWOD）装置中，液滴是使用离散电极阵列产生的电场在基板上移动的。在这项研究中，我们表明可以利用光电子湿润（PEW）效应（EWOD的光激活变体）利用局部光束在整个基板上驱动液滴。由PEW驱动的液滴传输消除了对电极阵列的需求，并消除了其制造和控制带来的复杂性，并为设计芯片实验室应用提供了一种新方法。我们报告了最大液滴速度的测量结果，该测量结果是施加的偏压的频率和大小，照明强度，液滴的体积和粘度的函数，并且还引入了可再现这些数据的模型。