Nanoelectronics Laboratory, Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0030, USA.
ACS Appl Mater Interfaces. 2010 Nov;2(11):3318-23. doi: 10.1021/am100757g. Epub 2010 Oct 25.
The use of paper as a material for various device applications (such as microfluidics and energy storage) is very attractive given its flexibility, versatility, and low cost. Here we demonstrate that electrowetting (EW) devices can be readily fabricated on paper substrates. Several categories of paper have been investigated for this purpose, with the surface coating, roughness, thickness, and water uptake, among the most important properties. The critical parameter for EW devices is the water contact angle (CA) change with applied voltage. EW devices on paper exhibit characteristics very close to those of conventional EW devices on glass substrates. This includes a large CA change in oil ambient (90-95°), negligible hysteresis (∼2°), and fast switching times of ∼20 ms. These results indicate the promise of low-cost paper-based EW devices for video rate flexible e-paper on paper.
鉴于纸张具有柔韧性、多功能性和低成本等优点，将其作为各种器件应用（如微流控和储能）的材料非常具有吸引力。在这里，我们证明了可以在纸张衬底上轻松制造电润湿（EW）器件。为此目的已经研究了几类纸张，其中最重要的性质包括表面涂层、粗糙度、厚度和吸水性。EW 器件的关键参数是随施加电压的变化的水接触角（CA）变化。纸张上的 EW 器件的特性非常接近玻璃衬底上的传统 EW 器件的特性。这包括在油性环境中（90-95°）大的 CA 变化、可忽略的滞后（约 2°）以及约 20 ms 的快速开关时间。这些结果表明，低成本的基于纸张的 EW 器件有望用于纸张上的视频速率柔性电子纸。
