The Application of Commercial Surface Acoustic Wave Radio Communication Filters as Transducers for DMMP Sensors

IF 3.4 3区综合性期刊 Q2 CHEMISTRY, ANALYTICAL

Sensors Pub Date : 2024-07-02 DOI:10.3390/s24134299

Michał Grabka, Krzysztof Jasek, Mateusz Pasternak, Zygfryd Witkiewicz

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引用次数: 0

Abstract

In the present study, we used two popular radio communication SAW resonators as a base for gas sensors and tested their performance. Taking into account issues related to sensor sensitivity, the possibility of applying a sensor layer, the availability of devices, and other related issues, we selected two popular single-port resonators with center frequencies of 315 and 433 MHz (models R315 and R433, respectively) for testing purposes. Both resonators were equipped with a sensitive film of hexafluoroisopropanol-substituted polydimethylsiloxane, a material that selectively absorbs molecules with a high ability to form basic hydrogen bonds. Fabricated sensors were used to detect trace amounts of dimethyl methylphosphonate (DMMP) vapor, which has often been used in similar studies as a nerve chemical warfare agent simulant. Sensors using both devices loaded with sensor layers of an optimal thickness rapidly reacted to a gas containing DMMP at a concentration of 3 mg/m3, generating a stable analytical signal ranging from several to several dozen kilohertz. In the case of R433, the frequency signal was 20.5 kHz at 1 min from the beginning of exposure to DMMP. The obtained results showed that the used transducers exhibited good performance as a base for gas sensors. Finally, their suitability for sensing applications was confirmed by a comparison with the results obtained in previous similar studies.

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将商用表面声波无线电通信滤波器用作 DMMP 传感器的换能器

在本研究中，我们使用了两种常用的无线电通信声表面波谐振器作为气体传感器的基础，并测试了它们的性能。考虑到传感器灵敏度、应用传感器层的可能性、器件的可用性以及其他相关问题，我们选择了两个中心频率分别为 315 和 433 MHz 的常用单端口谐振器（型号分别为 R315 和 R433）进行测试。这两个谐振器都配备了由六氟异丙醇取代的聚二甲基硅氧烷制成的敏感薄膜，这种材料可选择性地吸收形成基本氢键能力强的分子。制作的传感器用于检测痕量甲基膦酸二甲酯（DMMP）蒸气，这种蒸气在类似研究中经常被用作神经化学战剂模拟剂。使用这两种装置的传感器都装有最佳厚度的传感器层，能迅速对浓度为 3 mg/m3 的含有 DMMP 的气体发生反应，产生几千赫兹到几十千赫兹的稳定分析信号。就 R433 而言，在开始接触 DMMP 1 分钟时，频率信号为 20.5 千赫。结果表明，所使用的传感器作为气体传感器的基础具有良好的性能。最后，通过与以前类似研究中获得的结果进行比较，证实了这些传感器适用于传感应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors 工程技术-电化学

CiteScore

7.30

自引率

12.80%

发文量

8430

审稿时长

1.7 months

期刊介绍： Sensors (ISSN 1424-8220) provides an advanced forum for the science and technology of sensors and biosensors. It publishes reviews (including comprehensive reviews on the complete sensors products), regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.