The contactless/contact type detection technologies of chemical warfare agents

Sanjeeb Lama; Hyewon Park; Jinuk Kim; Jihyun Kim; Byung Yeol Seo; Sivalingam Ramesh; Joo-Hyung Kim

doi:10.1117/12.2585326

22 March 2021 The contactless/contact type detection technologies of chemical warfare agents

Sanjeeb Lama, Hyewon Park, Jinuk Kim, Jihyun Kim, Byung Yeol Seo, Sivalingam Ramesh, Joo-Hyung Kim

Proceedings Volume 11591, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2021; 115911X (2021) https://doi.org/10.1117/12.2585326
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

Chemical Warfare Agents (CWAs), powerful chemical weapons in warfare and armed conflict, were prohibited by the Organization for the Prohibition of Chemical Weapons (OPCW), but the danger persists because of its misuse in terrorism and warfare. It is crucial to detect them rapidly because exposure to small quantity of CWAs can cause lethal damage or death in a short time. Generally, they have been detected by various conventional techniques such as photoionization, ion mobility spectroscopy, flame photometry, and IR spectroscopy. But most of these methods possess a crucial challenge in being a portable detector because they are heavy, bulky, and consumes large power. In this study, the surface acoustic wave (SAW) sensor, quartz crystal microbalance (QCM) sensor, and quantum cascade lasers (QCL) were used to detect simulant of CWA. The SAW sensor and QCM sensor, a chemical detector based on piezoelectric substrates, detect chemical compounds using mass loading effect. It is caused by the adsorption of chemical compounds on the sensing material coated on the surface of the delay line. Therefore, the synthesis method, coating process, type, and concentration of sensing material have a prime effect on the sensitivity of the sensor. QCL was used to make a contactless small chemical detector with a mid-infrared photodetector, drive circuit, and optical hardware. Most CWAs have very high absorption rates and different absorption spectra in the range of 8-12 μm wavelengths. This detection method provides real-time detection of CWAs based on advantages of being contactless, excellent selectivity, and high sensitivity.

Conference Presentation

Citation Download Citation

Sanjeeb Lama, Hyewon Park, Jinuk Kim, Jihyun Kim, Byung Yeol Seo, Sivalingam Ramesh, and Joo-Hyung Kim "The contactless/contact type detection technologies of chemical warfare agents", Proc. SPIE 11591, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2021, 115911X (22 March 2021); https://doi.org/10.1117/12.2585326

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