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The sensibility of resistance sensor structures with graphene to the action of selected gaseous media

Pustelny T., Setkiewicz M., Drewniak S., Maciak E., Stolarczyk A., Urbańczyk M., Procek M., Gut K., Opilski Z., Pasternak I., Strupinski W.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2013

Vol. 61, nr 2

293--300

The paper presents resistance sensor structures with a graphene sensing layer. The structures were tested concerning their sensitivity to the affects of hydrogen, nitrogen dioxide and steam in an atmosphere of a synthetic air. Investigations have proved that resistance structures with a graphene layer are sensitive to the presence of the tested gases. The resistance of the structures amounted to about 10Ω, whereas changes in the resistances affected by the external gaseous medium were contained within the range of a several mΩ. The investigations confirmed that the resistance structures with graphene exposed to the affect of hydrogen in atmosphere of synthetic air change their resistances practically at once (within the order of only a few seconds). This indicates that such structures might be practically applied in sensors of hydrogen ensuring a short time of response.

Electronic and gas sensing properties of soluble phthalocyanines

Pochekailov S., Rais D., Nešpůrek S., Rakušan J., Karásková M.

Materials Science Poland

2009

Vol. 27, No. 3

781--795

Some optical and electrical properties of 3-diethylamino-1-propylsulfonamide substituted zinc and metal-free phthalocyanines are presented. These materials are sensitive to NO2 even at concentrations as low as 0.1-2.5 ppm. Electrical conductivity and photoconductivity were used as the detection methods.