Synthesis and Characterization of a 1:6 Au-CdSe Nanocomposite

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• 作者：Scott L. Cumberland ; Mia G. Berrettini ; Artjay Javier ; and Geoffrey F. Strouse
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：March 11, 2003
• 年：2003
• 卷：15
• 期：5
• 页码：1047 - 1056
• 全文大小：589K
• 年卷期：v.15,no.5(March 11, 2003)
• ISSN：1520-5002

文摘

Development of synthetic strategies that allow the formation of controlled 3-dimensionalarchitectures composed of discrete ensembles of nanoparticles is a challenging goal. Wepresent a synthetic strategy that allows the preparation of a macroscopic 3-D metal-semiconductor assemblage composed of 6.0-nm Au and 6.0-nm CdSe nanoparticles cross-linked by a bifunctional organic spacer. Optical absorption and electron microscopy imaging,coupled to electron diffraction and energy-dispersive X-ray analysis, indicate a 1:6 Au-CdSe composite that appears to be uniform over a micrometer scale. The 1:6 structure isbelieved to be a close-packed structure which arises from a combination of soft-sphere packingforces due to van der Waals and steric forces, and thermodynamic forces due to an acid/base controlled selective interaction of the organic headgroup moieties with the nanoparticlesurfaces.