In this paper, we propose a new strategy for the sensitive and specific detections of dimethyl methylphosphonate (DMMP), as a simulant of nerve agent Sarin. Our silicon nanowire based sensor is modified with carboxyphenylboronic acid (CPBA) to demonstrate great efficiency. The response time is less than 100 seconds to recognize the DMMP, which is a key ability for on-site monitoring. The sensor exhibits a good reversibility during the repeated measurements between DMMP vapor and air. The sensor still performs well after being exposed in high concentration of DMMP vapor with excellent recovery for 3 times. The sensor is demonstrated to have a linear behavior in detecting DMMP within the concentration of 13~65 ppm in gaseous phase with the limit of detection (LOD) of 100 ppb. It is expected that the proposed sensor enables the testing system accurate, rapid, sensitive and reversible for on-site detection of nerve agents in the future.

中文翻译：

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使用硅纳米线 FET 传感器对神经毒剂模拟物 DMMP 进行痕量分析

在本文中，我们提出了一种用于敏感和特异性检测甲基膦酸二甲酯 (DMMP) 的新策略，作为神经毒剂沙林的模拟物。我们的基于硅纳米线的传感器用羧基苯基硼酸 (CPBA) 进行了修饰，以展示出很高的效率。响应时间小于100秒识别DMMP，这是现场监控的关键能力。该传感器在 DMMP 蒸汽和空气之间的重复测量过程中表现出良好的可逆性。该传感器在暴露于高浓度 DMMP 蒸气中 3 次后仍然表现良好，具有出色的恢复能力。该传感器被证明在检测气相中 13~65 ppm 浓度范围内的 DMMP 时具有线性行为，检测限 (LOD) 为 100 ppb。