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Information × Registration Number 0220U100929, 0119U100326 , R & D reports Title Study of physic-chemical processes in semiconductor materials and their interfaces for sensory and diagnostics devices. popup.stage_title Head Skryshevsky Valeriy Antonovych, Доктор фізико-математичних наук Registration Date 29-01-2020 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of the study: solid-state semiconductor nanomaterials, their colloidal solutions and interaction processes in the interfaces of semiconductors and nanocomposites with analyte. Purpose: creation of physicochemical bases of functioning of high-performance sensor and diagnostic systems for analysis of gases and liquid solutions. Research Methods: Impedance Spectroscopy, Photoluminescence (PL), Scanning Electron Microscopy (SEM), Photovoltaic and Electrophysical Methods, FTIR. The technology of creation of new nanomaterials and structures for sensors (silicon nanowires with radial p-n junction, porous gallium arsenide, carbon nanospheres) has been developed. It is shown that the treatment of p-type silicon wafers in alcohol-aqueous solutions of ferric chloride provides a controlled passivation of the silicon surface, which allows the surface of the plate to be modified for sensor systems with electronic nose function. A new method of functionalization of carbon nanomaterials due to fluorination of carbon microspheres has been developed, which allows to obtain fluorine-containing microspheres for sensors, catalysts, fuel cells. Optical, luminescent, electrical, photoelectric effects in the developed nanostructured semiconductors have been investigated and their effects on the gas environment have been investigated. The physical principles of semiconductor transducer operation based on barrier structures with deep p-junction are considered. This structure implements a fundamentally new photoelectric conversion principle and is suitable for the creation of complex sensor systems. For detection, the surface distribution of the photocurrent and its dependence on the polarization voltage between the analyte and the substrate are measured. The possibility of detection of solutions of chloric acid salts with the help of the developed sensor has been demonstrated. Product Description popup.authors Evtukh Anatoliy A. Ivanov Ivan I. Bunak Sergiy V. Gavrilchenko Iryna V. Zaderko Alexander М. Kozynez Oleksiy V. Lytvynenko Sergiy V. Milovanov Jurij S. Manilov Anton I. Marin Volodymyr V. Pylypova Olga V. Skryshevsky Valeriy A. Zyganova Ganna I. Schulimov Yuriy G. popup.nrat_date 2020-04-02 Close