Preparation and Characterazation of Fluorescent Silica Microspheres
Water-soluble CdTe quantum dots(QDs) with mercaptoacetic molecules as ligands, were obtained by the reduction of CdCl2 through NaHTe under alkaline conditions. The sub-micron fluorescent spheres were synthesized by silica coated CdTe cadmium QDs, through the ammount control of tetraethyl orthosilicate (TEOS), ammonia, QDs suspension, ethanol and the ratio of them. The fluorescent property of as-prepared QDs was researched using fluorescent spectrometer, and some influencing factors in the process of preparation were discussed. Morphology and coated effect of silica composite spheres were observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the fluorescence intensity was analyzed using fluorescence microscope.
H.M. Zhang and B. Wu
L. G. Sun et al., "Preparation and Characterazation of Fluorescent Silica Microspheres", Advanced Materials Research, Vols. 391-392, pp. 493-496, 2012