Ratchet Motion of a Droplet on Asymmetric Electrodes

When a droplet is deformed asymmetrically, the ratchet motions of the droplet can be induced as demonstrated on the vibrated gradient surface and on a saw-shaped electrode on which the wetting was changed by electrowetting [48]. 

The presented results show that the simple asymmetric pattern caused directional deformations and transport of a droplet. This technique is applicable to generation of a flow in microfluidic devices. 

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