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Facile synthesis and properties of CdSe quantum dots in a novel two-phase liquid/liquid system

Jidong Wang,Xiaoyu Wang,Hengshan Tang,Zehua Gao,Shengquan He,Dandan Ke,Yue Zheng,Shumin Han

High-quantity CdSe QDs were synthesized in a novel two-phase liquid/liquid system. This system, ODE/water was stable and as-used solvents were almost nontoxic. The methodology leading to the successful synthesis of CdSe QDs was a typical, one-pot approach and the obtained CdSe QDs with zinc-blende phase structure exhibited excellent optical properties , narrow size distribution, higher particle uniformity and crystallinity . The mechanism of nucleation and growth of CdSe QDs were discussed by the possible thermodynamic equilibrium existing in ODE/water interface. This two-phase liquid/liquid system would broaden the synthesis of other semiconductor QDs.