Synthesis and Characterization of Cadmium Selenide Nanorods Via Surfactant‐Assisted Hydrothermal Method

Abstract

Single‐crystal CdSe nanorods ([001] 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 Na 2 SeO 3 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.