Mn doped ZnS nanoparticles have been extensively studied from the viewpoint of quantum size effects and the luminescent efficiency. In recent years

high luminescent efficiency association with particle size has been observed in Mn doped ZnS nanoparticles. In this article

a novel chemical method was developed to produce size monodisperse

highly luminescent

organic-monolayer passivated Mn doped ZnS nano-powder. The prepared particles are as small as 1.8~2nm

capped or modified by methacrylate polymer

their thermal

mechanical

chemical stability

durability

lifetime and luminescent intensity were greatly improved. The methacrylate polymer binds to the ZnS:Mn nanocrystalline surface through the physical absorption and provides steric stabilization through the hydrocarbon chain. The particle sizes can be easily controlled by the lengths of the polymer

which can be realized by changing the mole ratio of monomer to chain-transfer agent. The photoluminescence (PL) spectra of the ZnS:Mn nanopowder exhibit a slight red shift in optical properties. The enhanced PL intensity was explained by the nanosize effect. Transmission electron microscopy (TEM)

X-ray powder diffraction (XRD) and photoluminescence (PL) are used to characterize the structure of ZnS:Mn nanopowder. The size of the particles determined from XRD line broadening did not particularly differ from the results of TEM. The novel chemical method can be extensible to synthesize other kinds of metal doped nanopowders

and can also be extensible to prepare nearly monodispersivity Ⅱ-Ⅵ semiconductor nanopowders only need to select suitable material.