Air-Stable Single-Source Precursors for the Synthesis of Chalcogenide Semiconductor Nanoparticles

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• 作者：M. Azad Malik ; Neerish Revaprasadu ; and Paul O'Brien
• 刊名：Chemistry of Materials
• 出版年：2001
• 出版时间：March 2001
• 年：2001
• 卷：13
• 期：3
• 页码：913 - 920
• 全文大小：540K
• 年卷期：v.13,no.3(March 2001)
• ISSN：1520-5002

文摘

Bis(hexylmethyldithio-/diselenocarbamato)cadmium(II)/zinc(II) (M(E₂CNMeⁿHex)₂ [M =Zn, Cd; E = S, Se]) have been used as single-source precursors for the preparation of TOPO-capped CdS, CdSe, ZnS, and ZnSe nanoparticles. The precursors are stable for long periodsof time and pyrolyse cleanly to give high yields of nanocrystals. The nanoparticles were ofhigh quality, close to monodispersed, and showed quantum confinement with characteristicclose to band edge luminescence in their emission spectra. The broad diffraction in the XRDpattern and diffuse diffraction rings of the SAED pattern are typical of nanometric sizeparticles. The TEM micrographs showed well-defined, close to spherical particles and thelattice fringes in the HRTEM images confirmed the crystalline nature. The presence of astrong phosphorus peak in the EDAX spectra is indicative of TOPO or TOPE (E = S or Se)bound to the surface.