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The project aims at preparation of nanostructured oxidic materials
(SnO2, WO3, ZnO a In2O3),
intended for sensitive layers of chemiresistors, and study of surface
reactions taking place
during the detection of selected classes of gaseous analytes (oxidizing
gases - O2, NO2;
reducing gases - H2, CH4; gases/vapours that can form hydrogen bonds
with oxidic surface -
H2O, NH3; unsaturated hydrocarbons; alcohols and ketones) on these
layers. In the framework
of the project a new diagnostic tool (NAP XPS) will be utilized for
measurement of
photoelectronic spectra during exposition of sensitive layer by gaseous
analyte. It will enable to
reveal the mechanisms of surface reactions during detection. There will
be explored both
experimental and theoretical consequences between nanoscale (morphology
of sensitive layer,
chemism of detection processes on its surface, corresponding modulation
of electrophysical
parameters of the layer) and macroscale - properties of chemiresitor as
an integral device (
sensitivity, selectivity, stability).
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