摘要
1-dimensional (1D) metal-semiconductor nano-scale composite superstructures based on Au nanoparticles and CdS nanorods were prepared.The outer surface of CdS nanorods was modified with mercapto-ethylamine (MEA) in advance.With the aid of MEA,dense and uniform Au nanoparticles were deposited onto the external wall of CdS nanorods through in situ chemical reduction of AuCl4-ions.Those Au nanoparticles induced further electroless deposition and a continuous layer of Au was formed on CdS nanorods.Stable hollow Au tubes were obtained after the inner CdS cores were etched by HCl.UV-Vis,FL,XPS,EDX,TEM and SEM measurements were carried out to characterize the produced materials.The quenching of the defect emission of CdS in CdS-nanorod/Au-nanoparticle hybrid superstructures was detected,which was ascribed to the energy transfer from the exciton of CdS to surface plasma resonance level of Au.
1-dimensional （1D） metal-semiconductor nano-scale composite superstructures based on Au nanoparticles and CdS nanorods were prepared. The outer surface of CdS nanorods was modified with mercapto-ethylamine （MEA） in advance. With the aid of MEA, dense and uniform Au nanoparticles were deposited onto the external wall of CdS nanorods through in situ chemical reduction of AuCl4^- ions. Those Au nanoparticles induced further electroless deposition and a continuous layer of Au was formed on CdS nanorods. Stable hollow Au tubes were obtained after the inner CdS cores were etched by HCl. UV-Vis, FL, XPS, EDX, TEM and SEM measurements were carried out to characterize the produced materials. The quenching of the defect emission of CdS in CdS-nanorod/Au-nanoparticle hybrid superstructures was detected, which was ascribed to the energy transfer from the exciton of CdS to surface plasma resonance level of Au.
基金
supported by the National Natural Science Foundation of China (Grant No.90406018)
Ministry of Science and Technology of China (Grant Nos.2006CB0N0403 and 2007CB936202)
