Chemically Triggered Biodelivery Using Metal–Organic Sol–Gel Synthesis

Living cells can be coated with continuous oxide shells prepared from modified titanium alkoxides (see picture). The shells efficiently isolate the encapsulated biomaterial from the surrounding medium. The resulting colloid media are highly biocompatible; subsequent release (biodelivery) of encapsulated cells or drugs is possible by dissolution of the titania nanoparticles.