Horbenko Y. Hybrid nanostructures based on polyarenes and oxide, carbon and silicon clusters

The features of process of forming, structure and properties of the hybrid nanosystems based on the polyarenes of different structure and their composites with oxide, carbon and silicon nanoclusters were investigated. For the first time, a method of surface modification of polymer-magnetic nanocapsules with luminescent nanocrystals BaZrO3 and PAn as an conductive substrate was proposed and implemented. The special spin dynamics of paramagnetic centers in model nanosystems based on conjugated polymers doped with iron-containing compounds has been revealed. It has been found that the introduction of an iron-containing compound at the synthesis stage can lead to the formation of a completely amorphous hybrid structure (PoA/FeCl3), as well as the creation of islands of the new crystalline phase (PAn/FeCl3). It was found that fullerene can act as an active electron acceptor and as a dopant, which increases the concentration of free carriers in PPA/C60. The inclusion of CNT leads to an increase in the size of the structural elements due to the ordering of the polymer chains PAN and PEDOT and improves the parameters of charge transfer. It was found that the modification of the surface of porous silicon with graphene oxide (GO) and reduced GO causes a shift in the photoluminescence spectra and a significant change in the volt-ampere characteristics. The introduction of 1–4% of modified SiO2 nanoclusters causes an increase in the electrical conductivity of PAn and provides stabilization of its resistivity to the action of moisture, as well as sensitivity to the hydrogen chloride vapors. Flexible sensory elements based on PEDOT with nanocrystals of porous silicon and CNT have been created, and significant changes in their electrical properties under the influence of water vapor and ammonia at room temperature have been shown. Ways of using thin films of hybrid structures based on conductive polymers modified by carbon and silicon nanoclusters as sensitive elements in resistive and optical sensor devices for various purposes are proposed.