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1. (WO2018048316) A METHOD FOR OBTAINING MANGANESE-DOPED LUMINESCENT NANOPARTICLES OF ZINC SELENIDE HAVING POSITIVE SURFACE CHARGE

Pub. No.:    WO/2018/048316    International Application No.:    PCT/PL2017/000079
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Wed Aug 23 01:59:59 CEST 2017
IPC: C01B 19/00
C09K 11/88
Applicants: POLITECHNIKA KRAKOWSKA IM. TADEUSZA KOŚCIUSZKI
Inventors: MATRAS-POSTOŁEK, Katarzyna
SOVINSKA, Svitlana
Title: A METHOD FOR OBTAINING MANGANESE-DOPED LUMINESCENT NANOPARTICLES OF ZINC SELENIDE HAVING POSITIVE SURFACE CHARGE
Abstract:
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.