Comparison of chemical warfare agent detection according to delay line of surface acoustic wave sensor (Conference Presentation)

Hyeong Seon Choi; Heechan Jang; Bong-Gyu Bae; Young-Jun Lee; Joo-Hyung Kim

doi:10.1117/12.2662686

18 April 2023 Comparison of chemical warfare agent detection according to delay line of surface acoustic wave sensor (Conference Presentation)

Hyeong Seon Choi, Heechan Jang, Bong-Gyu Bae, Young-Jun Lee, Joo-Hyung Kim

Author Affiliations +

Proceedings Volume PC12485, Nano-, Bio-, Info-Tech Sensors, and Wearable Systems 2023; PC124850C (2023) https://doi.org/10.1117/12.2662686
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

In this study, the Surface Acoustic Wave (SAW) sensor was designed according to the length of the delay line, and its performance during the detection was studied as the design variable. Dimethyl methylphosphonate (DMMP), which imitates the chemical structure of nerve agent sarin and is relatively less toxic, was used to study the performance of gas detection in which POSS-TU (polyhedral oligomeric silsesquioxane – thiourea) was used as the sensing material. The experiments showed the frequency shift characteristics of the sensors. Among the sensors with the design error values, a specific sensor had the largest difference in the frequency shift between the first and second peaks. Also, both the noise and reactivity were better than other sensors. The fastest reversible characteristics in the recovery time were observed.

Conference Presentation

Citation Download Citation

Hyeong Seon Choi, Heechan Jang, Bong-Gyu Bae, Young-Jun Lee, and Joo-Hyung Kim "Comparison of chemical warfare agent detection according to delay line of surface acoustic wave sensor (Conference Presentation)", Proc. SPIE PC12485, Nano-, Bio-, Info-Tech Sensors, and Wearable Systems 2023, PC124850C (18 April 2023); https://doi.org/10.1117/12.2662686

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