Synthesis and Characterization of Cadmium Selenide Nanorods Via Surfactant-Assisted Hydrothermal Method
Abstract:Single-crystal CdSe nanorods ( orientation) with diameters in the range of 40–60 nm and aspect ratios of 5–8 were successfully synthesized at 180°C for 10 h through a facile surfactant-assisted hydrothermal method, using Na2SeO3 as a high-quality soluble selenium source. The products were characterized by X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, and ultraviolet–vis spectra analysis. It was found that the surfactant (cetyltrimethyl ammonium bromide) played a vital role in the process. Through varying the concentrations of surfactant, the morphologies changed from dendrite-like nanostructure to nanorods, short nanorods, and nanoparticles. The possible mechanism for the growth of CdSe nanocrystals was also discussed.
Document Type: Research Article
Affiliations: State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Publication date: June 1, 2005