Сolloidal synthesis and characterization of hydrophilic CdTe quantum dots for medical diagnostics

Abstract

THE medium PRESENT using article thioglycolic deals with acid colloidal (TGA), quantum L-cysteine dots (L-cys) (QDs) synthesized and mercaptoethylamine in an aqueous (MEA) as stabilizers. In contrast to high-temperature synthesis in an organic medium, this method of synthesis enables us to skip an additional time-consuming stage of hydrophilization of QDs. The resulting CdTe QDs were studied by spectroscopic methods of analysis. In the absorption spectra of the QDs there is an exciton peak which corresponds to the minimum energy required to form excitons in the QDs. The average size of the QDs, which is about 3-4 nm, was calculated based on the position of the exciton peak. The zeta potential of the QDs was measured and the results were compared with literature data.