General Synthetic Route toward Functional Hollow Spheres with Double-Shelled Structures

摘要

Hollow spheres and capsules have stimulated great interest because of their potential applications in controlled delivery systems,artificial cells,lightweight fillers,catalysis,and as vessels for confined reactions.Hollow spheres,in particular those with complex core-shell structures,have increasingly attracted interest as a result of their superior properties.For example,a unique plasmon hybridization has been reported on hollow spheres with two concentric metallic nanoshells,thus providing a novel method of tuning resonance frequency by nanostructure engineering.Polymeric hollow spheres with a movable gold nanoparticle core have also been obtained,which allow the optical sensing of chemicals diffused into the cavity.