Microdroplet Actuation via Light Line Optoelectrowetting (LL-OEW)

Figure 5

(OEW) Frames from a video (to be read columnwise from top to bottom and from left to right) showing the droplet movement actuated by a perpendicularly incident laser beam (from below here). The droplets are moved towards each other one after the other and merged/fused. The transparent spacer pattern appears light gray here. The darker regions beyond the spacer are areas like those inside the spacer pattern, but not relevant for the purpose of this OEW actuation test. ((V)_ac = ±  40 V @ 50 Hz).