Abstract:

A novel method was developed for the synthesis of thioglycolic acid-capped CdTe quantum dots (QDs)in aqueous medium when tellurium dioxide worked as tellurium source and sodium borohydride acted as reductant.The influence of experimental conditions, including refluxing time, pH value, molar ratio of tellurium to cadmium and temperature on the reaction was studied.The products were further characterized by ultraviolet-visible spectroscopy, fluorescent spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD)and scanning electron microscopy (SEM).The results showed that nanoparticles with thioglycolic acid modification for CdTe were of zinc-blended crystal structure in a sphere-like shape, and their absorption and fluorescence spectra were red-shifted as refluxing time increased.