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|Title:||CO sensing with SnO2-based thick film sensors: Surface state model for conductance responses during thermal-modulation||Authors:||Fort, Ada
SERRANO SANTOS, M. B.
Atrei, Andrea Massimo
|Issue Date:||2006||Project:||None||Journal:||SENSORS AND ACTUATORS. B, CHEMICAL||Abstract:||
There exists a strong interest in developing simplified models able to predict the SnO2 sensor response and aiming at a better comprehension of themechanisms involved with sensing operation. In this paper, a simple grey-box model is proposed for predicting, with a good approximation (r.m.s.error < 10%), the behavior of some commercial SnO2-based sensors in presence of oxygen and a reducing gas (CO) during fast temperature variations.Auger electron spectroscopy (AES) permitted to highlight differences in the surface composition of the sensors after extended operation time.
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