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Information × Registration Number 0225U002706, (0120U102354) , R & D reports Title New generation nanocomposites and magnetic nanostructures: EPR and optical diagnostics and practical applications popup.stage_title ЕПР та КРС діагностика гібридних нанокомпозитів на основі фенілону Head Konchyts Andrii A., Доктор фізико-математичних наук Registration Date 31-03-2025 Organization V. Lashkaryov Institute of semiconductor physics popup.description1 The project is aimed at the development and practical application of magnetic resonance and optical methods of diagnostics of the latest nanostructured materials: nanocomposites with hybrid nanofillers (containing several components) and / or hybrid polymer matrix for tribological applications; semiconductor composites with CdS, C and SiC nanoparticles for applications in optoelectronics and biosensors; of complex magnetic nanostructures Fe3O4: Gd: B, promising for neutron-capture oncotherapy. Determination of electronic properties of carbon fibers of other carbon nano- and microstructures and their role in the formation of electronic and tribological properties of hybrid nanocomposites based on phenylone. To determine the electronic and magnetic properties of carbon-induced paramagnetic centers responsible for the luminescent properties of SiO2: C nanocomposites under the conditions of their heat treatment at different temperatures. Identify the factors that influence the relaxation processes of photo-excited carriers in polymer composites with CdS nanoparticles of different sizes and suggest ways to achieve maximum luminescence intensity. To develop a technique for the EPR diagnostics of porous SiC and products formed during electrochemical dissolution in order to use it as a catalyst carrier. To develop a technique for the EPR diagnostics of multicomponent systems of magnetic nanoparticles Cu / CuO and Fe3O4: Gd: B, to fully describe their magnetic characteristics, creating a base for their further use in medicine. popup.description2 The objects of research are Phenilon C-2 polymer (PS-2), micrographite (MG), carbon fibers (CF), FS-2/CF, FS-2/CF composites, FS-2/CF/CF hybrid composites. The purpose of the work is to study the patterns of resonant (EPR, FMR) and non-resonant microwave absorption (NMP), establish the mechanism of the synergistic effect in hybrid composites, identify the correlation between the magnetic and mechanical properties of CF and composites and obtain new opportunities for improving the technology of their synthesis. Research methods are electron paramagnetic resonance (EPR), Raman light scattering (RS). The dynamics of the paramagnetic properties of CF of various types and countries of origin were studied. A correlation was found between their magnetic and mechanical properties, which consists in the interrelation of the shape and width of the EPR line and mechanical properties. The electronic subsystem of carriers, due to the semiconductor properties of the BB, is characterized by a strong NMP, which in powder composites can be controlled by changing the BB concentration and powder density. This allows you to controlably change their microwave shielding characteristics. The process of preparing composites is accompanied by friction of strong BBs with uniaxial FM particles - mixing activators, as a result of which micro- and nanoparticles of FM material are cleaved, the FMR signal of which reveals a superlinear growth of signals with increasing BB concentration. Hybrid composites FS-2 / MG / BB with an optimized composition of components show improved physical and mechanical characteristics, including due to the manifestation of a synergistic effect. The latter is manifested in microwave properties in the nonlinear nature of the dependence of resonant and non-resonant microwave absorption on the ratio between the composition of the filler components, which creates an additional independent mechanism for optimizing hybrid composites. Product Description popup.authors popup.nrat_date 2025-03-31 Close