Ammonia sensors based on sensitive polyaniline films
Ammonia sensors based on sensitive polyaniline films
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DOI：
10.1016/s0925-4005(97)80128-1
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发表时间：
1996-12-01
影响因子：
8.4
通讯作者：
Piletsky, SA
中科院分区：
文献类型：
--
作者：
Kukla, AL;Shirshov, YM;Piletsky, SA
提出了一种以聚苯胺（导电聚合物）为敏感元件的新型氨传感器。这种传感器的特点是灵敏度高，测量浓度范围宽（1-2000 ppm），电气参数稳定性高。聚苯胺的使用确保了传感器在氧化环境中的高化学稳定性。提出了一种基于定制封装在线性塑料外壳中的硅芯片的传感器设计。该芯片配有加热器和温度计系统，以检查传感器运行的温度状态。我们研究了传感器的I-V曲线，温度，浓度和动力学特性，以及它们的老化。强调了传感器参数在氨环境中长期工作后产生热的可能性。
We propose a new type of ammonia sensor with polyaniline (electroconducting polymer) as the sensitive element. Such sensors are characterized by high sensitivity, wide range of measured concentrations (1-2000 ppm) and high stability of electrical parameters. The use of polyaniline ensures high chemical stability of the sensors in oxidizing ambients. A sensor design based on a silicon chip custom-packed into a linear plastic case is presented. The chip is provided with a system of heaters and thermometers to check the temperature regime of sensor operation. We have studied I-V curves, temperature, concentration and kinetic characteristics of the sensors, as well as their ageing. The possibility for thermoregeneration of the sensor parameters after long-term functioning in an ammonia ambient is emphasized.