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Research Article Open Access

Modelling of Dynamic Response of WO3 Gas Sensors under CO


We propose a model for gas sensors dynamic response which puts emphasis on conduction properties of n-type semiconductors. This model gives a physico-chemical description of gas detection mechanisms, by focusing on the extrinsic behavior of the sensor in the presence of reducing gas. Theoretical modeling of the sensor resistance in respect to experimental results was done to optimize sensor performances and also to better understand the gas detection mechanisms. This model especially applies in the case of exposure to low gas concentrations.

Mehdi Othman, Khalifa Aguir*, Najeh Mliki and Philippe Menini

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