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A Facile Route to Aqueous Ag:ZnCdS and Ag:ZnCdSeS Quantum Dots: Pure Emission Color Tunable over Entire Visible Spectrum. -Aqueous Ag:ZnCdS quantum dots (QDs) are prepared based on a co-nucleation doping strategy using aqueous solutions of Cd(OAc) 2, Zn(OAc)2 (in presence of mercaptopropionic acid; Cd:Zn molar ratio of 1:1), and AgNO 3 at pH 7 to which a reactive S (and Se) powder precursor (hydrothermal S (Se) solution in presence of NaBH 4) is given (autoclave, 180 C, 2 h). The influence of various experimental variables including the Zn/Cd ratio and Ag-doping concentration on luminescence and UV/Vis absorption spectra of Ag:ZnCdS QDs are systematically investigated. Color-tunable Ag:ZnCdSeS QDs are also prepared via variation of the Se/S precursor ratio. Furthermore, highly efficient Ag:ZnCdS/ZnS and Ag:ZnCdSeS/ZnS core-shell QDs are constructed by depositing a ZnS shell around Ag:ZnCdS and Ag:ZnCdSeS core QDs. -(ZENG*, R.; SUN, Z.; CAO, S.; SHEN, R.; LIU, Z.; LONG, J.; ZHENG, J.; SHEN, Y.; LIN, X.; J. Alloys Compd. 632 (2015) 1-9, http://dx.