Synthesis and characterization of bismuth oxide based and c-dots hybrid materials for teragnostic applications. The aim of this thesis work is to synthesize and subsequently to conjugate carbon dots (C-Dots) with microparticles of Bismuth Oxide. C-Dots are composed by sp^2 and sp^3 hybridized carbon structures with size of few nanometers. Since their discovery, C-Dots have attracted a great attention on the due to their simple synthesis, solubility, photoluminescence, biocompatibility and presence of surface functional groups acting as anchoring points for a variety of drugs. The bottom-up approach has been used for the C-Dots synthesis through citric acid (AC) and p-Phenylendiamine (DPA), in order to promote polymerization, and subsequent purification by means of two different methods.