Title :
NiO-TiO2 thick-films for detection of alcohol vapours at room temperature
Author :
Arshak, K.I. ; Cavanagh, L.M. ; Gaidan, I. ; Moore, E.G. ; Clifford, S.A. ; Phelan, R. ; Cunniffe, C. ; Harris, J.A. ; Lyons, G.M.
Author_Institution :
Khalil Arshak Electron. & Comput. Eng. Dept., Limerick Univ., Ireland
Abstract :
The response of screen-printed thick-films of NiO/TiO2 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.
Keywords :
chemical variables measurement; gas sensors; nickel compounds; organic compounds; thick films; titanium compounds; 19 s; 9 s; NiO-TiO2; NiO-TiO2 thick-films; alcohol vapour detection; ethanol; methanol; organic solvent vapours; propanol concentration; resistance change; room temperature; screen-printed thick-films; selectivity; toluene; Delay; Displays; Ethanol; Gas detectors; Methanol; Steady-state; Temperature sensors; Testing; Thick film sensors; Time factors;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426258
