Multicompartmental micro- and nanocapsules: hierarchy and applications in biosciences.

Multicompartmentalized micro- and nanocapsules allow simultaneous delivery of several vectors or biomolecules; they are the next generation of carriers with increased complexity. Here we overview multicompartment micro- and nanocapsules and present a road-map for future developments in the field. Four basic building block structures are demonstrated, three isotropic: concentric, pericentric, and innercentric, and one anisotropic: acentric.