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首页> 外文会议>Sensors for Propulsion Measurement Applications >Hydrazine Leak Detection Using Poly (3-hexylthiophene) Thin Film Micro-sensor
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Hydrazine Leak Detection Using Poly (3-hexylthiophene) Thin Film Micro-sensor

机译：聚（3-己基噻吩）薄膜微传感器检测肼泄漏

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摘要

Hydrazine is mostly used as a propellant in the control/propulsion system of missiles, spacecraft and satellites. However with its highly toxic and strong reducing nature, hydrazine is very dangerous to humans and the environment. In this research, a low cost, passive, and highly sensitive micro-sensor has been developed as an alarm device for real-time monitoring for the accidental release of hydrazine, and to insure the safety of personnel and the readiness of the system before lift-off. The micro-sensor is fabricated using standard microelectronic manufacturing techniques and is composed of interdigitated electrodes and a hydrazine-sensitive poly (3-hexylthiophene) (P3HT) thin film. When exposed to 1ppm of hydrazine gas, the compensation interaction between the reducing hydrazine gas and p-type doped P3HT leads to a five order magnitude increase in the resistance of the device. The sensor is capable of detecting hydrazine leaks from tens of ppb to tens of ppm concentration. The sensitivity of sensor increases with the increasing of hydrazine concentration and the decreasing of the polymer film thickness. A numerical simulation result based on the possible theoretical model is compared with the experimental data, which shows a good agreement.
机译：肼主要在导弹，航天器和卫星的控制/推进系统中用作推进剂。但是，肼具有剧毒和强还原性，对人类和环境都非常危险。在这项研究中，开发了一种低成本，无源且高度灵敏的微传感器作为报警设备，用于实时监控肼的意外释放，并确保人员安全和系统在升空前准备就绪-关。使用标准微电子制造技术制造微传感器，该微传感器由叉指式电极和对肼敏感的聚（3-己基噻吩）（P3HT）薄膜组成。当暴露于1ppm的肼气体中时，还原的肼气体与p型掺杂的P3HT之间的补偿相互作用导致器件的电阻增加了5个数量级。该传感器能够检测从数十ppb到数十ppm浓度的肼泄漏。传感器的灵敏度随着肼浓度的增加和聚合物膜厚度的减小而增加。将基于可能的理论模型的数值模拟结果与实验数据进行了比较，表明了很好的一致性。

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