Title :
Response of poly(vinyl acetate)/carbon black composites to ethanol vapour and temperature
Author :
Arshak, K.I. ; Cavanagh, L.M. ; Moore, E.G. ; Clifford, S.A. ; Harris, J.A. ; Cunniffe, C. ; Lyons, G.M.
Author_Institution :
Dept. of Electron. & Comput. Eng., Limerick Univ., Ireland
Abstract :
The effect of ethanol vapour and temperature was investigated on gas sensors fabricated from poly(vinyl acetate)/carbon black composites based around a predetermined percolation threshold. Samples with 8% carbon black loading displayed the best response to the ethanol vapour. Typical response and recovery times of 140s and 45s respectively were recorded. In addition, bridge structures were fabricated, where all four resistive elements were prepared from the same composite material and in which a novel passivation process was employed. It was observed that these bridge structures were significantly less affected by variations in temperature in comparison to the single sensor structures.
Keywords :
composite materials; conducting polymers; filled polymers; gas sensors; 140 s; 45 s; bridge structures; ethanol vapour; gas sensors; percolation threshold; poly(vinyl acetate)/carbon black composites; recovery times; response times; temperature; Bridge circuits; Bridges; Chemical elements; Composite materials; Conducting materials; Conductivity; Ethanol; Passivation; Polymers; Temperature sensors;
Conference_Titel :
Microelectronics, 2004. 24th International Conference on
Print_ISBN :
0-7803-8166-1
DOI :
10.1109/ICMEL.2004.1314588
