Electrowetting

Electrowetting is one of several techniques that have been used to actuate microdroplets in a digital microfluidic device. Electrowetting is essentially the phenomenon whereby an electric field can modify the wetting behavior of a droplet in contact with an insulated electrode. If an electric field is applied non-uniformly then a surface energy gradient is created which can be used to manipulate a droplet sandwiched between two plates. Electrowetting arrays allow large numbers of droplets to be independently manipulated under direct electrical control without the use of pumps, valves or even fixed channels.

External links

* Digital Microfluidics at Duke University

 

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