Field effect devices sensitive to CO at room temperature

R ARAGÓN; LOMBARDI, R

Buenos Aires

Congreso; 15th International Meeting on Chemical Sensors; 2014

Comisión Nacional de Energía Atómica

[5,10,15-Tris(2,6-dichlorophenyl)corrolato]cobalt(III) was used to chemisorb CO selectively, on the gap-gate of MOS capacitors and the state of charge monitored by voltage shifts of the photocurrent induced by pulsed illumination under constant D.C. bias, proportionally to CO concentration in air. Negative chemically induced charges at room temperature induce positive responses above and negative shifts below the threshold voltage, conforming to acceptor behavior, and the dynamic range (100 ppm) is limited by device capacitance.