Hybridmultifunctional materials are the critical link between present technologiesand future applications and their synthesis and characterization thusconstitute important steps towards the development of more complex structuresin polymer and synthetic organic chemistry. Composites are attractive scaffoldsfor a variety of high-end applications, conforming a fascinating toolkit withhuge potential for adaptation to operate efficiently in a wide variety ofarchitectures, sizes and features, ultimately having a major influence on thefinal properties and applications of the materials.

Over the last three decades, research on hyperbranchedpolymers and surface functionalization has been accorded high priority inpolymer technology because their inherent properties are quite different from thoseof conventional polymers.

In this chapter, we highlight the synthetic approachesand hierarchical strategies used to manipulate the shape, architecture and morphologyof nanostructures assembled or covalently bonded to specific substrates such asinorganicand highly crossslinked organic polymers. Special attention is given to structure/propertyrelationships deriving from the controlled design of multibranched andmultifunctional materials, emphasizing the importance of dendritic effects ondifferent hybrid structures.