NiO-TiO/sub 2/ thick-films for detection of alcohol vapours at room temperature

The response of screen-printed thick-films of NiO/TiO/sub 2/ to organic solvent vapours was studied. It was found that these films displayed a significant resistance change in response to the vapours even at room temperature. The sensors displayed an inherent selectivity, proving most sensitive to t...

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Hauptverfasser:	Arshak, K.I., Cavanagh, L.M., Gaidan, I., Moore, E.G., Clifford, S.A., Phelan, R., Cunniffe, C., Harris, J.A., Lyons, G.M.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Delay Displays Ethanol Gas detectors Methanol Steady-state Temperature sensors Testing Thick film sensors Time factors
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Beschreibung
Zusammenfassung:	The response of screen-printed thick-films of NiO/TiO/sub 2/ to organic solvent vapours was studied. It was found that these films displayed a significant resistance change in response to the vapours even at room temperature. The sensors displayed an inherent selectivity, proving most sensitive to toluene and propanol vapour; with comparatively low responses exhibited towards ethanol and methanol vapours. Very fast response and recovery times of 9 s and 16 s respectively were recorded for the devices upon exposure to 4000 ppm step changes in propanol concentration.
DOI:	10.1109/ICSENS.2004.1426258