His work has aimed at the interplay among finite-size, surface, interface, interaction and proximity effects, and at the intimate correlation of the nanostructure to the magnetic, electronic and electron transport properties of nanomaterials, including thin films and heterostructures, nanoparticles, nanostructures and nanoelements. At present, he is working on potential applications of magnetic nanoparticles in biomedicine and has started a new research in arrays of plasmonic nanoelements.