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Information × Registration Number 0223U001427, 0122U001953 , R & D reports Title Physico-chemical properties of nanostructured carbon-containing and semiconductor thin-film structures for the needs of renewable hydrogen energy popup.stage_title Head Korotchenkov Oleh O., Доктор фізико-математичних наук Registration Date 28-01-2023 Organization Taras Shevchenko National University of Kyiv popup.description2 The aim of this research is to develop the physical principles of functioning of nanostructured materials based on carbon and semiconductor thin-film structures in renewable energy systems. The changes in thermal and thermoelastic parameters in composite systems with liquid/solid interfaces and metal-fullerene nanocomposites were observed, and the fundamental processes of nanocrystallization and phase formation processes in metal alloys and metal-carbon nanocomposites were clarified. Using photothermoacoustic technique, an increase in thermal conductivity (up to 50%) of the hybrid nanocomposite with the "multilayer porous silicon / liquid" interface was found compared to the original system without liquid. A significant increase in the thermal conductivity of such hybrid systems can be explained by the improvement of the thermal contact inside the nanostructures due to the filling of the pores between the silicon nanocrystallites with liquid. An improvement in the thermoelectric response of metal-fullerene nanocomposites in the form of Ni–C60 thin layers is reported. It is shown that the introduction of C60 molecules into the nickel film can increase the value of thermopower by four times. An increase in the Seebeck coefficient was also registered in the chains of silver nanoparticles– C60. These effects are associated with enhanced scattering of charge carriers and phonons at the Ni/C60 and Ag/C60 interfaces. The features of charge transfer at the Ag/C60 interface, which affect the formation of the photoelectric response of Ag–C60 composites, are clarified. It is found that illumination lowers the barrier at the Ag/C60 interface for the transfer of electrons from C60 molecules to Ag nanoparticles. The positive charge accumulated on C60 causes the reverse transfer of electrons with the corresponding quenching of the photovoltage during the accumulation of exciting light pulses. Product Description popup.authors Borovy Mykola A. Gorb Alla M. Kuzʹmych Аndriy G. Lishchuk Pavlo O. Mayko Oleksandr M. Nadtochij Andrij B. Ovsienko Iryna V. Olikh Oleh Ya. Podolian Artem O. Polovyna Oleksiy I. Sayenko Galyna V. Tsarehradska Tetyana L. Chupryna Roman G. popup.nrat_date 2023-01-28 Close