Concurrent droplet charging and sorting by electrostatic actuation
Concurrent droplet charging and sorting by electrostatic actuation
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DOI：
10.1063/1.3250303
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发表时间：
2009-10-01
期刊：
影响因子：
3.2
通讯作者：
Oh, Kwang W.
中科院分区：
文献类型：
--
作者：
Ahn, Byungwook;Lee, Kangsun;Oh, Kwang W.
介绍了一种基于液滴的静电驱动微流控装置，实现了液滴的同时充电和分选。油包水液滴可以通过同步静电驱动在发电时充电。然后，同时，预充电的液滴可以通过静电引导进入任何指定的层流流线，从而可以以受控的方式逐个分选到多个分选通道中的一个。在本文中，我们研究了不同水油相对流量下水滴的尺寸依赖性。我们演示了通过同步静电驱动对多达600个液滴进行并行充电和分选/S。最后，我们研究了稳定液滴充电和分选的优化电压。对于微滴的快速、稳健和多路分选以及基于液滴的微流控系统而言，这是一项重要的使能技术。
This paper presents a droplet-based microfluidic device for concurrent droplet charging and sorting by electrostatic actuation. Water-in-oil droplets can be charged on generation by synchronized electrostatic actuation. Then, simultaneously, the precharged droplets can be electrostatically steered into any designated laminar streamline, thus they can be sorted into one of multiple sorting channels one by one in a controlled fashion. In this paper, we studied the size dependence of the water droplets under various relative flow rates of water and oil. We demonstrated the concurrent charging and sorting of up to 600 droplets/s by synchronized electrostatic actuation. Finally, we investigated optimized voltages for stable droplet charging and sorting. This is an essential enabling technology for fast, robust, and multiplexed sorting of microdroplets, and for the droplet-based microfluidic systems.