Drug delivery using nanoparticle-stabilized nanocapsules.

Microcapsules (MCs) are versatile systems with applications in areas as diverse as microreactors, catalysis,[1] diagnostics and drug delivery.[2] In these systems self-assembly of lipids and/or polymers can be used to generate several types of nano- and micro- capsules. These include vesicular structures such as liposomes,[3] polymerosomes,[4] colloidosomes,[5] and polyelectrolyte capsules that feature aqueous interiors and exteriors.[6] An alternate motif is provided by emulsions, where additives are used to stabilize the interface between immiscible fluids to produce e.g. oil-in-water emulsions.[7] Through tailoring of the composition and structure of the building blocks MCs of both types can be engineered with well-defined structures, functions and stability.[8] MCs provide excellent delivery vehicles for biomedical applications, featuring high payload-to-carrier ratios and protection of encapsulated materials from degradation.

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