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Information × Registration Number 0212U006377, 0110U006230 , R & D reports Title Invesetigation of optical properties and tunnel processes of carriers (excitons) in two-phases semiconductors nanosystem of type "core@shell" C1@C2 (С1 = SiO2, C2 = ZnO, CdS, ZnSe, ZnS and other) that are promising blocks for materials of nanophysics and electronics. popup.stage_title Head Brodyn M.S., Registration Date 23-03-2012 Organization Institute of physics NASU popup.description2 During work adaptation of method of templates synthesis is conducted for the receipt of heteronanoparticles "core-shell" with the diameter of kernel ~ of 300 nm and shell from isolated QDs CdS by the diameter ~ of 3 nm, and different closeness of coverage of surface of kernel (20 or 50%). This method is universal and allows forming the core from II - VI nanocrystals of other compositions. It is certain that the previous stabilizing of QDS CdS prevents of the agglomeration of the macromoleculs of polyacrylic acid isolated КТ CdS by adsorption on the surface of SiO2 and ensures the formation of a monolayer of CdS QDs on the surface of the modified areas of SiO2. Semiconductor absorption mechanism QDs CdS on the surface of spherical QDs particles silicon dioxide was researched. A method for the gradual formation shell that ensures uniform distribution of semiconductor nanocrystals on the surface of the kernel. It is shown that to control the uniform filling of the core surface, the absorption process must be conducted at low concentrations of CdS QDs in solution (3 o 10-2 g/dm3). It was calculated that at each stage of the building shell over the surface of a silicon dioxide particles, to be, on average, 5 o 102 quantum dots. By the method of spraying of suspension on warmed-up the substrate were got with close-packed layer heteronanoparticles SiO2/CdS in thick 5-7 mk. Except it, was established of the optimal concentrations of connecting agent - polyacrylic acid for in order to receive the layer of high quality. Product Description popup.authors Єрмолаєва Юлія Володимирівна Бондар Микола Володимирович Бродин Михайло Семенович Матвєєвська Неоніла Анатолієвна Толмачов Олександр Володимирович popup.nrat_date 2020-04-02 Close