Ammonia gas sensor based on electrosynthesized polypyrrole films |
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Authors: | Stéphanie Carquigny Jean-Baptiste Sanchez Boris Lakard Fabrice Lallemand |
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Institution: | a LCPR-AC, UMR CEA E4, Université de Franche-Comté, Bâtiment Propédeutique, 16 route de Gray, 25030 Besançon Cedex, France b Institut UTINAM, UMR CNRS 6213, Université de Franche-Comté, Bâtiment Propédeutique, 16 route de Gray, 25030 Besançon Cedex, France |
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Abstract: | In this work, design and fabrication of micro-gas-sensors, polymerization and deposition of poly(pyrrole) thin films as sensitive layer for the micro-gas-sensors by electrochemical processing, and characterization of the polymer films by FTIR, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), are reported. The change in conductance of thin polymer layers is used as a sensor signal. The behaviours, including sensitivity, reproducibility and reversibility, to various ammonia gas concentrations ranging from 8 ppm to 1000 ppm are investigated. The influence of the temperature on the electrical response of the sensors is also studied. The experimental results show that these ammonia gas sensors are efficient since they are sensitive to ammonia, reversible and reproducible at room temperature. |
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Keywords: | Gas sensor Ammonia Polypyrrole Electrochemistry |
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