Formation of -phase WO3 nanostructures for sensor applications.
Smyntyna, Valentyn A.
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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 . The decrease of grain size in metal oxides led phase transitions even at room temperatures . WO3 ε-phase nanostructures showed good sensitivity to acetone.
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