Facile Sonochemical Synthesis of Highly Luminescent ZnS-Shelled CdSe Quantum Dots

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• 作者：Michael J. Murcia ; David L. Shaw ; Heather Woodruff ; Christoph A. Naumann ; Bruce A. Young ; and Eric C. Long
• 刊名：Chemistry of Materials
• 出版年：2006
• 出版时间：May 2, 2006
• 年：2006
• 卷：18
• 期：9
• 页码：2219 - 2225
• 全文大小：282K
• 年卷期：v.18,no.9(May 2, 2006)
• ISSN：1520-5002

文摘

The sonochemically driven synthesis of CdSe quantum dots (QDs) and their subsequent sonochemicalZnS shelling is described. By adapting the use of Cd(OAc)₂, TOPO, and hexadecylamine to an ultrasound-driven synthesis and by applying a subsequent sonochemical ZnS shelling procedure to CdSe QD coresusing Zn-ethylxanthate, highly luminescent QDs with quantum yields of 50% to 60%, narrow emissionspectra (fwhm ~25 nm), and size distributions of ~10% were obtained. Furthermore, QD synthesis viaultrasound has several attractive features, such as a straightforward process control in the absence of anyoutside heat source and the ability to achieve nucleation and growth at bulk temperatures notably lowerthan those required for thermal techniques. The approach presented herein is accessible to laboratorieswith limited synthetic expertise to create CdSe/ZnS QDs.