A ferrofluid droplet on a superhydrophobic surface is subjected to increasing magnetic field of a cylindrical permanent magnet. This results in division into numerous daughter droplets that form different static self-assembled patterns to minimize their total energy. In the end, the magnetic field is decreased, resulting in relaxation of the conical daughter droplets into spherical ones.
Credit: Aalto University
[ Read the Article: Ferrofluid Experiment Evolves New Patterns ]