A METHOD FOR OBTAINING MANGANESE-DOPED LUMINESCENT NANOPARTICLES OF ZINC SELENIDE HAVING POSITIVE SURFACE CHARGE

摘要

A method for obtaining manganese-doped luminescent nanoparticles of zinc selenide having positive surface charge, in which nanoparticles are obtained in an aqueous reaction mixture containing a zinc-precursor in the form of zinc acetate (Zn(Ac)-2H₂O), a manganese-precursor in the form of manganese acetate (Μn(Αc)·4Η₂O), a selenium-precursor which is the product of reaction of metallic selenium and sodium borohydride (Mn(Ac)4H₂O), a stabilizer from the group of thiol compounds, characterized in that the stabilizer is 2-mercaptoethylamine hydrochloride (HSC₂H₄NH₂-HCl) in such an amount that the weight ratio Zn(Ac)-2H₂O : Mn(Ac)-4H₂O : HSC₂H₄NH₂-HCl : H₂O is from 8.33 : 1 : 2.76 : 476.19 to 2.56 : 1 :1.35 : 136.67. The synthesis of ZnSe:Mn nanoparticles is performed at a molar ratio of selenium (calculated as metal Se) to Zn(Ac)-2H₂O from 0.57 to 1.23.