title: Ammonia gas sensor based on electrosynthesized polypyrrole films.
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.
authors.affiliation: LCPR-AC, UMR CEA E4, Université de Franche-Comté, Bâtiment Propédeutique, Besançon Cedex, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Carquigny
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Sanchez
authors.forename: Franck
authors.initials: F
authors.lastname: Berger
authors.forename: Boris
authors.initials: B
authors.lastname: Lakard
authors.forename: Fabrice
authors.initials: F
authors.lastname: Lallemand
mesh_terms: D000641:Ammonia / Q000032:analysis*; D004553:Electric Conductivity; D005740:Gases; D011108:Polymers / Q000138:chemical synthesis*; D011758:Pyrroles / Q000138:chemical synthesis*; D015203:Reproducibility of Results; D013696:Temperature
chemical_list: D005740:Gases; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D000641:Ammonia