Перегляд за Автор "Golovanov, V. V."

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  • Ескіз
    Документ
    CdxS- and Snx WOy,-based gas sensors: the role of chemical composition in co sensing
    (Одеський національний університет імені І. І. Мечникова, 2001) Golovanov, V. V.; Smyntyna, Valentyn A.; Brinzari, V.; Korotcenkov, G.
    Electronic structure of chemisorption complexes on surface of oxidic a-SnxWOy- and CdxS-based gas sensors with different elemental composition were comparatively studied by XPS, CEMS and combined with conductivity measurements. The surface sites of Cd and Sn with different coordination were characterized by chemisorption of CO. It was found, differing from the case in well-oxidized S n 0 2, that electrical conductance of Sn.WO,, and Cd^S films appeared to either increase or decrease when exposed to CO depended on concentration of surface Sn and Cd ions, partial pressure of analyzed gas and operating temperature.
  • Ескіз
    Документ
    CdxS- AND SnxWOy-BASED GAS SENSORS: THE ROLE OF CHEMICAL COMPOSITION IN CO SENSING
    (Astroprint, 2001) Golovanov, V. V.; Smyntyna, Valentyn A.; Brinzari, V.; Korotcenkov, G.
    Electronic structure of chemisorption complexes on surface of oxidic a-S^WO^- and Cd,S-based gas sensors with different elemental composition were comparatively studied by XPS, CEMS and IR-spectroscopy combined with conductivity measurements. The surface sites of Cd and Sn with different coordination were characterized by chemi¬sorption of CO. It was found, differing from the case in well-oxidized Sn02, that elec¬trical conductance of Sn,WOj, and CdxS films appeared to either increase or decrease when exposed to CO depended on concentration of surface Sn and Cd ions, partial pressure of analyzed gas and operating temperature.
  • Ескіз
    Документ
    Rehybridization AT (110) Faces OF Sn02
    (Одеський національний університет імені І. І. Мечникова, 2001) Golovanov, V. V.; Rantala, Т. T.; Rantala, T. S.; Lantto, V.
    Rehybridization of surface atoms and relaxation of (110) face of Sn02 is theoretically examined. Using molecular mechanics and ab initio data for surface relaxation we choose the best hybridization related force field for molecular dynamics (MD) simulations. The most prominent feature of relaxation, surface in-plane oxygen displacement of the reduced surface outwards of about 0,4 E relative to the bulk position, is analyzed in details.