Nanosys Inc. 1 article published in JoVE Chemistry Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles Andrew Tobias1, Song Qing2, Marcus Jones1 1Department of Chemistry, University of North Carolina at Charlotte, 2Nanosys Inc. The synthesis of uniform gold nanoparticles coated with semiconductor shells of CdS or ZnS is performed. The semiconductor coating is conducted by first depositing a silver sulfide shell and exchanging the silver cations for zinc or cadmium cations.