An enhancement of selectivity of sensor materials, based on nanocrystalline SnO2 is reported. Selectivity toward target gases such as CO, NO2, NH3, H2S and acetone vapor, could be achieved by selection of catalytic cluster distributed over the surface of thick film material. Presented results allow us to propose application of obtained materials in "electronic nose" sensor systems

Vanadium oxide nanorods were prepared by a hydrothermal route and then tested as a transducer for a resistive-type gas sensor. The importance of control of pH and pressure during the synthesis of 1D crystals of vanadium oxide was demonstrated for the V 2 O 5 /ethanol mixture, which served as a pre-

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