Reversible switching between static and dynamic self-assembly of magnetic droplets

Reversible switching between static and dynamic self-assembly of magnetic droplets on a superhydrophobic surface. The static self-assembly of seven droplets is reversibly switched to dynamic self-assemblies by feeding energy. The cylindrical magnet below the superhydrophobic substrate is attached to a computer-controlled linear actuator that puts the magnet into a sinusoidal motion with different frequencies and amplitudes. At sufficiently high energy feed, the static self-assembly switches to different dyn