Перегляд за Автор "Viter, Roman"

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  • Ескіз
    Документ
    Formation of -phase WO3 nanostructures for sensor applications.
    (Одеський національний університет імені І І. Мечникова, 2010) Lappalainen, F.; Viter, Roman; Puustinen, J.; Gornostaev, D.; Smyntyna, Valentyn A.; Lydina, I.; Lantto, V.; Jantunen, H.
    Ferroelectric phase of tungsten trioxide, called ε-phase, appears as result of high pressure treatment or temperature decrease up to -40 0C [1-3]. Because of pressure and temperature effect oxygen atoms in the WO3 structure are shifted from equilibrium positions. It results in dipole formation in WO3 ε-phase and its ferroelectric properties [3]. The decrease of grain size in metal oxides led phase transitions even at room temperatures [3]. WO3 ε-phase nanostructures showed good sensitivity to acetone.
  • Ескіз
    Документ
    I-V characterization of tin oxide nanocrystalline films for optical fiber sensors
    (Астропринт, 2007) Viter, Roman; Smyntyna, Valentyn A.; Nitsuk, Yu.; Pisco, M.; Consales, M.; Campopiano, S.; Giordano, M.; Cusano, A.; Cutolo, A.
    Tin oxide Sn02 is well known as material for gas sensors.Tin oxide is chemically stable for different aggressive chemical pollutants and doesn't change its structure under high temperatures [1].This good features let to fabricate many different sensors, based on tin oxide to different gases.Also tin oxide thin films have been successfully used as transparent conducting electrodes in optical devises [1].Such properties allow thinking about combination of optical and sensitive peculiarities of tin oxide for new applications
  • Ескіз
    Документ
    Optical Biosensors Based on ZnO Nanostructures: Advantages and Perspectives. A Review
    (2016-06) Tereshchenko, Alla V.; Bechelany, Mikhael; Viter, Roman; Khranovskyy, Volodymyr; Smyntyna, Valentyn A.; Starodub, M. F.; Yakimova, R.; Терещенко, Алла Владимировна; Терещенко, Алла Володимирівна
    This review article highlights the application of beneficial physico-chemical properties of ZnO nanostructures for the detection of wide range of biological compounds. As the medical diagnostics require accurate, fast and inexpensive biosensors, the advantages inherent optical methods of detection are considered. The crucial points of the immobilization process, responsible for biosensor performance (biomolecule adsorption, surface properties, surface defects role, surface functionalization etc.) along with the interaction mechanism between biomolecules and ZnO are disclosed. The latest achievements in surface Plasmon resonance (SPR), surface enhanced Raman spectroscopy (SERS) and photoluminescence based biosensors along with novel trends in the development of ZnO biosensor platform are presented.