基于电合成聚吡咯薄膜的氨气传感器。

Ammonia gas sensor based on electrosynthesized polypyrrole films.

作者信息

Carquigny Stéphanie, Sanchez Jean-Baptiste, Berger Franck, Lakard Boris, Lallemand Fabrice

机构信息

LCPR-AC, UMR CEA E4, Université de Franche-Comté, Bâtiment Propédeutique, Besançon Cedex, France.

出版信息

Talanta. 2009 Apr 15;78(1):199-206. doi: 10.1016/j.talanta.2008.10.056. Epub 2008 Nov 11.

DOI:10.1016/j.talanta.2008.10.056

PMID:19174225

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.

摘要

在本工作中，报道了微气体传感器的设计与制造、通过电化学工艺聚合和沉积聚吡咯薄膜作为微气体传感器的敏感层，以及通过傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对聚合物薄膜进行表征。聚合物薄层电导的变化用作传感器信号。研究了该传感器对8 ppm至1000 ppm范围内各种氨气浓度的响应行为，包括灵敏度、重现性和可逆性。还研究了温度对传感器电响应的影响。实验结果表明，这些氨气传感器效率高，因为它们在室温下对氨气敏感、可逆且可重现。