METHOD OF PRODUCING GAS SENSOR BASED ON THERMOVOLTAIC EFFECT IN ZINC OXIDE Russian patent published in 2017 - IPC G01N27/12 B82B1/00 B82B3/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to nanotechnology and can be used in making gas sensors. Disclosed is a method of making gas sensors, comprising a housing, a two-layer nanostructure of ZnO-ZnO:Cu installed therein on a base, point contacts connected to terminals of the housing placed in an insulator and a nozzle providing contact of detected gas with a sensitive element. Two-layer nanostructure of ZnO-ZnO:Cu, in which a thermovoltaic effect is observed, is synthesised via sol-gel technology from sol by dissolving an inorganic zinc salt in alcohol and adding a surfactant, followed by stirring with subsequent ageing of sol. Lower layer of nanostructure is formed from pure zinc oxide by immersing substrate at ⅔ length in sol and drying. Upper layer of zinc oxide is doped with copper, formed by two or three times dipping of other end of substrate at ⅔ length with subsequent drying and annealing.

EFFECT: invention enables to make a gas sensor based on thermovoltaic effect in zinc oxide, which has high sensitivity to reducing gases.

3 cl, 4 dwg