Browsing by Author "Aksimentyeva, O."

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    Electrooptical characteristics of the novelty system: ionic doped liquid crystal - conductive polymer
    (Видавництво Національного університету «Львівська політехніка», 2004) Mykytyuk, T.; Aksimentyeva, O.; Stakhira, P.; Cherpak, V.; Fechan, A.; Konopelnik, O.; Fomenko, V.; Hlushyk, I.
    Taking into account that ionic-doped liquid crystals are conductive and the conductance depends on dopant concentration, we suggested using ionic-doped liquid crystals as a electrolytic medium in a described configuration of cell. The application of an ionic doped liquid crystal as electrolytic medium in electrochromic device were investigated. Polyaniline is a conductive polymer and has electrochromic effect in an electrolytic medium under the applied voltage. The spectral investigation of the electrohromic effect of polyaniline was carried out in a new cell. The spectral dependences of such structure were presented on paper. An appearance of electrochromic effect was observed in a structure SnO2 – liquid crystal – polyaniline - SnO2.
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    Structure and gas sensitivity of the ZnO sensor of ethanol
    (Видавництво Львівської політехніки, 2012) Tsizh, B.; Aksimentyeva, O.; Lazorenko, V.; Chokhan, M.
    We studied the influence of substrate nature and type of doping on the structure and sensor properties of thin films of ZnO, obtained on the surface of glass, quartz, sital, leuco-sapphire and oxidized silicon by thermo vacuum deposition. With X-ray investigation it shown that the obtained films consist of nanocrystalline zinc oxide, regardless of the nature of the surface, and the best structural perfection characterized ZnO film on the surface of the quartz and glass. The sensitive properties of zinc oxide films to ethanol vapors greatly improved by introducing of doping impurities (Al or In), a highest sensitivity to ethanol was detected for the films of ZnO − Al on the quartz substrate. The proposed sensor can be used to monitor gas environments in the food industry and in the evaluation of alcohol in humans breathing.
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    Transport and Relaxation of Charge in Organic-Inorganic Nanocomposites
    (2017-05-29) Olenych, I.; Aksimentyeva, O.; Tsizh, B.; Horbenko, Yu.; Ivan Franko National University of Lviv, Lviv, Ukraine; Stepan Gzytsky Lviv National University of Veterinary Medicine and Biotechnologies; Lviv, Ukraine; Kazimierz Wielki University, Bydgoszcz, Poland