Inorganic /organic core-shell hybrid nanostructures have received much attention due to their potential applications in optoelectronic devices such as light-emitting diodes, biosensors, and photovoltaic cells. The hybrid particles possess unique properties that neither the inorganic core nor organic shell can display alone. Recently, we developed a method to prepare covalently immobilized covalently interconnected layers of conjugated block copolymers on the surface of metal nanoparticles via surface-initiated chain-growth Kumada polycondensation. Conjugated polymers such as polythiophenes, poly-p-phenylenes and polyselenophenes were chosen as the organic shell. We utilized gold nanoparticles as a metal core since they can display optical amplification in conjugated polymer devices. The structure of the hybrid core-shell nanoparticles was investigated using small-angle neutron scattering techniques. In the case of multilayered shells (consisting of block copolymers), the efficiency of excitation energy transfer between the shell sublayers (and therefore the emissive properties of the particles) were investigated. The order of the sublayers, and, in particular, the first sublayer grafted to the core surface, was the determining factor in controlling the efficiency of energy transfer. Depending upon the type and proximity of the polymer shell to the core, we observed different extent of fluorescence efficiency and excitation quenching. Control experiments were also carried out on hybrid particles containing a silica core without the metal component. Pump-probe transient absorption spectroscopy studies were undertaken in order to determine the corresponding excited-state relaxation dynamics and the extent of energy transfer from conjugated polymer shell to metal core and vice versa.