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In this paper, we have achieved the hollow shell ZnS QDs with a simple preparation process, and deeply analysed the mechanism of hollow shell ZnS QDs (~10 nm). The co-doping of copper (Cu) and manganese (Mn) caused the cooperated effects on the ZnS quantum dots, in which hollow shell structure can be formed. The mechanism is that Mn 2+  ions in ZnS matrix provide some diffusion channels allowing the outward movement of the Cu 2+  ions. In addition, it has been shown that Cu doping at 0.2–0.3% and Mn doping at 3% could form hollow shell structure.

Cooperation effects of Cu and Mn impurities inducing the formation of hollow shell structured ZnS quantum dots