Undoped and doped poly(tetraphenylbenzidine) as sensitive material for an impedimetric nitrogen dioxide gas dosimeter
Undoped and doped poly(tetraphenylbenzidine) as sensitive material for an impedimetric nitrogen dioxide gas dosimeter
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DOI：
10.1063/1.4896847
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发表时间：
2014-09
影响因子：
4
通讯作者：
I. Marr;Katharina Neumann;M. Thelakkat;R. Moos
中科院分区：
文献类型：
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作者：
I. Marr;Katharina Neumann;M. Thelakkat;R. Moos
介绍了一种以聚四苯基联苯胺聚（TPD）为氮氧化物（NOx）敏感层的二氧化氮（NO2）检测气体剂量计。气体剂量计是在长时间内可靠地测定低水平分析物的合适装置。在NOx暴露过程中，分析物分子在剂量计的传感层中不可逆地积累，增强了多孔导电聚合物（TPD）的电导率，这可以通过阻抗光谱来测量。由于可以通过简单的印刷技术实现低成本的生产，并且具有良好的物理、光化学和电化学性能，聚（TPD）s适用于室温下工作的气体剂量计。我们研究了Co（III）配合物与导电盐复合掺杂对剂量计性能的影响。与未掺杂的材料相比，可以观察到掺杂的强烈影响：传感材料的电导率显着增加，信号的噪声降低。
This article presents a nitrogen dioxide (NO2) detecting gas dosimeter based on poly(tetraphenylbenzidine) poly(TPD) as nitrogen oxide (NOx) sensitive layer. Gas dosimeters are suitable devices to determine reliably low levels of analytes over a long period of time. During NOx exposure, the analyte molecules are accumulated irreversibly in the sensing layer of the dosimeter enhancing the conductivity of the hole conducting poly(TPD), which can be measured by impedance spectroscopy. Due to their possibility for low cost production by simple printing techniques and very good physical, photochemical, and electrochemical properties, poly(TPD)s are suitable for application in gas dosimeters operated at room temperature. We studied the effect of doping with a Co(III)-complex in combination with a conducting salt on the dosimeter behavior. Compared to the undoped material, a strong influence of the doping can be observed: the conductivity of the sensing material increases significantly, the noise of the signal d...