Our choice from the recent literature

Science 342, 460–463 (2013)

The researchers began by forming stable spherical liquid drops. Hydrophilic polystyrene nanoparticles were dispersed in water drops that were suspended in oil. An oleophilic molecule was added to the oil, which could interact with the nanoparticles and form nanoparticle surfactants. The surfactants self-assemble at the water/oil interface and create a disordered, jammed nanoparticle assembly. These spherical drops can then be deformed by applying an external electrical field, which increases the surface area of the drops and allows additional nanoparticle surfactants to form at the interface. When the field is removed, the drop is trapped in this non-equilibrium shape.