“…In this review, we present inorganic NPs that are synthesized using reducing and stabilizing agents where the reducing agent is responsible for the reduction of the metal from high oxidation states (+3, +2 or +1) to its metallic form (zero oxidation state), while the stabilizing agent is responsible for surface stabilization of metal nano materials [ 22 , 42 , 44 , 45 , 47 , 49 , 50 , 52 ]. Various NPs including AuNPs, selenium nanoparticles (SeNP), iron nanoparticles (FeNP), copper nanoparticles (CuNP) and silver nanoparticles (AgNP) were evaluated for their effective delivery of different radionuclides such as tecnetium-99m (Tc-99m), iodine-131 (I-131) and gold-198 (Au-198) to tumor sites for tumor theranostics [ 42 , 44 , 45 , 47 , 48 , 49 , 50 , 51 , 52 , 72 ].…”