Mn2+ doped ZnS quantum dots are prepared by chemical precipitation method.The structure,morphology and luminescence properties of the as-synthesized production are characterized by X-ray diffraction(XRD) spectra,high-resolution transmission electron microscope(HRTEM) images,and photoluminescence(PL) spectra.By comparing the photoluminescence spectra with the samples before and after drying in the air,the blue emission peaked at 441 nm originated from Vs defects is further confirmed.After dispersing the samp...