This letter reports two novel electrode design considerations to satisfy two very important aspects of EWOD operation—(1) Highly consistent volume of generated droplets and (2) Highly improved accuracy in the generated droplet volume. Considering the design principles investigated two novel designs were proposed; L-junction electrode design to offer high throughput droplet generation and Y-junction electrode design to split a droplet very fast while maintaining equal volume of each part. Devices of novel designs were fabricated and tested, and the results are compared with those of conventional approach. It is demonstrated that inaccuracy and inconsistency of droplet volume dispensed in the device with novel electrode designs are as low as 0.17 and 0.10%, respectively, while those of conventional approach are 25 and 0.76%, respectively. The dispensing frequency is enhanced from 4 to 9 Hz by using the novel design.

中文翻译：

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在电介质数字微流体上进行电润湿时，精确，一致且快速地进行液滴分离和分配

这封信报告了两个新颖的电极设计注意事项，以满足EWOD操作的两个非常重要的方面-（1）生成液滴的体积高度一致，以及（2）生成液滴体积的高度准确性提高。考虑到设计原则，提出了两种新颖的设计。L结电极设计可提供高通量的液滴生成，Y结电极设计可在保持各部分体积相等的同时非常快速地分离液滴。制作并测试了新颖设计的设备，并将结果与​​传统方法进行了比较。结果表明，在采用新型电极设计的装置中分配的液滴量的不准确性和不一致性分别低至0.17％和0.10％，而传统方法的液滴准确性和不一致性分别低至25％和0.76％。