Перегляд за Автор "Lappalainen, F."
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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.Документ Tin oxide-porphyrin structures as optical sensors for bio compounds detection(Астропринт, 2010) Viter, Roman V.; Smyntyna, Valentyn A.; Konup, Ihor P.; Lydina, I.; Puustinen, J.; Lappalainen, F.; Ishkov, Yurii V.; Vodzinskyi, Serhii V.; Ivanitsa, Volodymyr A.; Конуп, Игорь Петрович; Конуп, Ігор Петрович; Ішков, Юрій ВасильовичTin oxide is well known material for sensor application. Tin dioxide sensitive properties were studied by many authors. In spite of good sensitivity to different compounds it has low selectivity, which was compensated by varying of operation temperature or using metal dopants.