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0213U007030,
0112U004083
,
Formation methods development of the nanostructure objects on the II-VI semiconductor surfaces by the chemical etching and colloidal synthesis in the solutions, their introduction in solid state matrix and investigation of their optical and electrophysical properties.
Tomashik V. M., Доктор хімічних наук
21-03-2013
Institute of Semiconductor Physics of National Academy of Sciences of Ukrain
ABSTRACT. Report of scientific research work: 45 p., 18 fig., 5 tabl., 25 sources. The objects of investigation are the processes of CdS and CdSe nanoparticles synthesis in colloidal solutions, light-emitting structures containing pure or combined antibodies with colloidal CdSe and CdSeTe quantum dots in a ZnS shell, dried on Si crystalline wafer. The purpose of work is to develop the technological conditions of CdS nanosized particles synthesis with different concentrations of cadmium precursor salts and sodium thiosulfate, with stabilization of colloidal solutions in time interrupt of reaction or without it, and the study of the influence of synthesis conditions on the photoluminescence (PL) intensity of CdS nanoparticles (NPs), the synthesis of CdSe nanoparticles in micelle structures, which are formed by surface-active polymers in aqueous and organic solutions, the influence of duration of storage on fluorescent, optical and structural characteristics of CdSe / ZnS and CdSeTe / ZnS light-emitting structures with clean and bio-conjugated quantum dots. The methods of research are photoluminescence, Raman scattering, X-ray diffraction. It was found that the concentration increasings of precursors lead to a decrease of PL intensity of CdS NPs colloidal solutions because of the effect of the concentration damping effect of the PL. It was shown that the dispersion environment plays a decisive role in the formation of fluorescent CdS NPs in colloidal solutions in the absence of additional stabilizers the NP surface, and obtain stable solutions of CdS NPs using the stabilizer L-cysteine is only possible in the dispersion environment of polar solvent dimethylformamide. We proposed a method of NPs synthesis in micelles structures, which are formed by surface-active polymers in aqueous and organic solutions, that allows obtaining CdSe nanoparticles, which do not contain impurities, and based on them, are stable in time hydro and orhanozol that are capable to photoluminescence. It was shown that the nature changing and concentration of surface-active functional Oligoperoxides can control the size of the semiconductor particles and thus sols optical properties, including PL intensity. It was found that the shelf life light-emitting structures increasing with quantum dots increases the value of the photoluminescence spectral-shift and spectral position of the CdSe LO phonon peak, and these changes are much larger for bio-conjugated quantum dots. It was shown that the detected spectral changes result from oxidation core quantum dot, and the oxidation mechanism of acceleration is in bio
Єрмаков В.М.
Борковська Л.В.
Будзуляк С.І.
Вахняк Н.Д.
Демчина Л.А.
Калитчук С.М.
Капуш О.А.
Корбутяк Д.В.
Корсунська Н.О.
Крюченко Ю.В.
Мазарчук І.О.
Морозовська В.Й.
Палатний В.М.
Стара Т.Р.
Стратійчук І.Б.
Томашик З.Ф.
Тріщук Л.І.
Щербина Л.В.
Яшин А.І.
2020-04-02
Updated: 2025-12-08
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