In thepresentwork,thefeasibilitystudyofgrowthdopingstrategyfordirectpreparationofRu-doped ZnS quantumdots(QDs)inaqueoussolutionisinvestigatedbyX-raypowderdiffraction(XRD),trans- mission electronmicroscopy(TEM),UV–vis absorption,andphotoluminescence(PL)emissionspectro- scopies. StructuralinvestigationsindicatedthattheRu-dopedZnSQDswereabout3nminsize,showing size-dependent opticalpropertiesofthepreparedQDs.Specifically,threedifferentpeaksareobservedin photoluminescencespectraofRu-dopedZnSspecimens;averyweakexcitonicemissionatabout 350 nm,thebluetrap-relatedemissionaround420nm,andastrongcyandopant-relatedemissionat about 450nm.VariousparameterssuchassolutionpH,refluxing temperatureandprecursorsmolar ratios wereobservedtohavesignificant effectsonemissionpropertiesoftheas-preparedQDs.Byop- timization ofeachparameter,thebestresultforpreparationoftheRu-dopedQDswasdeterminedtobe; solution pH¼11,refluxing temperatureof100 °C andtheZn:ME:Ru:Smolarratioof1:50:0.01:0.5. Considering thesimplicity,fastness,andtheirnotablechemicalandopticalstabilities,thepresentQDs can beacandidateforvarietyofapplicationsinbiotechnologyandoptoelectronicdevices.
