The encapsulation of droplets

Various means for encapsulating liquid droplets are presented. That allows miscible liquids to be isolated from each other using a third fluid. Unusual fluid objects are obtained like antibubbles and liquid onions, using silicon oils and water/surfactant mixtures. The properties of such systems are given. Stability and phase diagrams are deudced from experiments. Mechanisms for the formation of encapsulated droplets are discussed. Some applications and future investigations are suggested.