**5. Conclusions**

The effect of metal nanostructures on emission of rare-earth compounds is reported in brief research. The emission of rare-earth ions is increased initially, but then decreased when the Ag NPs concentration was increased further. The dependence of Ag NPs on emission intensity reveals a strong linkage of luminescence centers and Plasmon resonance of NSs, as well as reabsorption of SPR of Ag NPs. The anticancer and antibacterial properties of the nanoparticles were remarkable.
