Figure illustrates EWOD (electrowetting on dielectrics) propulsion scheme in a mini-boat: (a) Initial state: horizontal force components of surface tension in the left and right are equal to each other (F_Lx = F_Rx). (b) Under voltage application to the left electrode, the contact line rises and the contact angle is decreased (EWOD actuation). That is, F_Lx < F_Rx. The boat would move from left to right.

This work was featured in news media and magazines including NewScientist and PittChronicle.