Polymeric-based nanocomposites with different structures using core-shell particles. The present invention provides a method for producing polymer-based core-shell nanocomposite structures. The nanocomposite materials may be produced with voids in them which may be partially or completely filled with other materials. The core and shell materials may be formed from multicomponent materials, in the case of the cores these may be for example multiple oxides, semiconductors and in the case of the polymer shell material multiple polymers in blends or copolymers.