Efeito de nanopartículas metálicas na criação de agregados e nas características ópticas de Rodamina 6G

In this work we study the effects of concentrations of the xanthene dye Rhodamine 6G (Rh-6G) and nanoparticles (NPs) of Au (gold) and Ag (silver) on the optical properties of Rh-6G. The studies were performed on three sets of samples: set Rn, consisting of aqueous solutions of Rh-6G with variation of its concentration, set AuRn, composed by fixed concentration of gold nanoparticles (NPsAu) inserted in an aqueous solution of Rh-6G, in which we vary the dye concentration and the hybrid combination of silver NPs and aqueous Rh-6G, with a concentration NPsAg fixed and varying the concentration of Rh-6G. For these studies we use conventional spectroscopy through of absorption and luminescence spectroscopic measurements. Through of the analysis of the set with only Rh-6G we conclude that the aggregate formation it is related to the concentration of Rhodamine 6G, as higher the concentration of Rh-6G, higher is the aggregates formation. When metallically nanoparticles are inserted in Rh-6G the effects of NPsAu and NPsAg on the optical properties of Rh-6G also present aggregate formation however when compared with the set Rh-6G we realize that the aggregate formation decrease. One can conclude that the behavior obtained to aqueous solutions of Rh-6G with NPsAu and NPsAg decrease the aggregate formation.