Abstract
Core-shell microstructures due to their great application potential are increasingly produced and studied by physicists. Spherical objects composed of a liquid core and solid particles adsorbed on its surface and forming a shell are of particular interest. Pickering droplets, microcapsules and liquid marbles that have such a structure are capable of safely transporting and controlled release of active substances, including anticancer drugs. This article presents an electric field based method of forming Pickering droplets both with a homogeneous and heterogeneous (Janus and patchy) coating. The method of strengthening the shells of the mentioned droplets in order to obtain microcapsules and the strategy of controlled release of their content using an ultrasonic stimulus are also discussed. The last part of the text shows the techniques of forming and functionalizing liquid marbles.