Synthesis and Size Control of Luminescent ZnSe Nanocrystals by a Microemulsion-Gas Contacting Technique

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• 作者：Georgios N. Karanikolos ; Paschalis Alexandridis ; Grigorios Itskos ; Athos Petrou ; and T. J. Mountziaris
• 刊名：Langmuir
• 出版年：2004
• 出版时间：February 3, 2004
• 年：2004
• 卷：20
• 期：3
• 页码：550 - 553
• 全文大小：127K
• 年卷期：v.20,no.3(February 3, 2004)
• ISSN：1520-5827

文摘

A scalable method for controlled synthesis of luminescent compound semiconductor nanocrystals (quantumdots) using microemulsion-gas contacting at room temperature is reported. The technique exploits thedispersed phase of a microemulsion to form numerous identical nanoreactors. ZnSe quantum dots weresynthesized by reacting hydrogen selenide gas with diethylzinc dissolved in the heptane nanodroplets ofa microemulsion formed by self-assembly of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethyleneoxide) amphiphilic block copolymer in formamide. A single nanocrystal is grown in each nanodroplet, thusallowing good control of particle size by manipulation of the initial diethylzinc concentration in the heptane.The ZnSe nanocrystals exhibit size-dependent luminescence and excellent photostability.