FIELD: chemistry.
SUBSTANCE: electric sensor for hydrazine vapours contains a dielectric substrate, on which placed are: electrodes and a sensitive layer, which changes photoconductivity as a result of hydrazine vapour adsorption; the sensitive layer consists of the following structure - graphene-semiconductor quantum dots, whose photoconductivity decreases when hydrazine molecules are adsorbed on the surface of quantum dots proportionally to the concentration of hydrazine vapour in a sample. If hydrazine vapours are present in the air sample, hydrazine molecules are adsorbed on the surface of quantum dots, decreasing intensity of quantum dot luminescence, which results in decrease of graphene conductivity proportionally to the concentration of hydrazine vapours in the analysed sample.
EFFECT: increase of sensitivity, decrease of determination sluggishness and simplification of the sensor manufacturing.
1 ex, 7 dwg
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