ZnS:Mn2+ nanoparticles were synthesized via a wet chemical method with L-cysteine as the stabilizing agent. The obtained aqueous dispersions show an orange luminescence, which is typical for the 4T1 → 6A1 transition within the Mn2+ d-orbitals. The fluorescence quantum yield has been determined with quinine sulphate as a dye reference. It can be increased after formation of a SiO2 shell around the particles by a factor of three. The particle size was determined with transmission electron microscopy (TEM), X-ray diffraction and PCS measurements.
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Financial support from the Commission for Technology and Innovation (TOP NANO 21 No: 4679.1) is gratefully acknowledged.
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Axmann, Y., Petri, A. & Hofmann, H. ZnS nanoparticles synthesis and characterization. MRS Online Proceedings Library 789, 1–6 (2003). https://doi.org/10.1557/PROC-789-N11.23