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A Composite Gas-Phase Explosives Sensor with Frequency-Resistance Dual-Signal Display Based on Surface Acoustic Wave A Composite Gas-Phase Explosives Sensor with Frequency-Resistance Dual-Signal Display Based on Surface Acoustic Wave AITranslate

Jie Yang; Tianran Wang; Chushu Zhu; Xuyuan Yin; Peitao Dong; Xuezhong Wu
National University of Defense Technology; National University of Defense Technology; National University of Defense Technology; National University of Defense Technology; National University of Defense Technology; National University of Defense Technology
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Publisher: ACS
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Abstract AITranslate

The surface acoustic wave (SAW) technology has been widely used for hazardous gas detection, but the low sensitivity, poor selectivity, long response/recovery time, and signal “false positives” of the sensors have limited its application for gas-phase explosives detection. In this paper, a composite gas-phase explosives sensor with frequency-resistance dual-signal display was designed by transferring 25 layers of graphene (rGO) in the sensing area of the SAW device and coupling p-aminothiophenol (PATP)-modified gold nanoparticles (AuNPs). The rGO:AuNP/PATP-SAW sensor shows signal response from two signal dimensions, frequency and resistance, to 0.1–80 ppm TNT gas with a low detection limit (DL) of 41.2 ppb. The composite sensor has a short response/recovery time (9.8 s/27.1 s) with good selectivity, repeatability, and stability. The excellent gas-sensitive performance of the rGO:AuNP/PATP-SAW sensor was attributed to the fact that PATP provides a large number of selective capture groups, which are enriched in the sensing area by the presence of multiple strong interactions with 2,4,6-trinitrotoluene (TNT) molecules. This work will provide scientific guidance for the engineering promotion of surface acoustic wave gas-phase explosives sensors.

KeyWords AITranslate

rGO SAW device TNT sensing frequencyresistance PATP
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Basic Information:

DOI：https://doi.org/10.1021/acsaelm.2c01554

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Citation Information:

The surface acoustic wave (SAW) technology has been widely used for hazardous gas detection, but the low sensitivity, poor selectivity, long response/recovery time, and signal “false positives” of the sensors have limited its application for gas-phase explosives detection. In this paper, a composite gas-phase explosives sensor with frequency-resistance dual-signal display was designed by transferring 25 layers of graphene (rGO) in the sensing area of the SAW device and coupling p-aminothiophenol (PATP)-modified gold nanoparticles (AuNPs). The rGO:AuNP/PATP-SAW sensor shows signal response from two signal dimensions, frequency and resistance, to 0.1–80 ppm TNT gas with a low detection limit (DL) of 41.2 ppb. The composite sensor has a short response/recovery time (9.8 s/27.1 s) with good selectivity, repeatability, and stability. The excellent gas-sensitive performance of the rGO:AuNP/PATP-SAW sensor was attributed to the fact that PATP provides a large number of selective capture groups, which are enriched in the sensing area by the presence of multiple strong interactions with 2,4,6-trinitrotoluene (TNT) molecules. This work will provide scientific guidance for the engineering promotion of surface acoustic wave gas-phase explosives sensors.

quote

GB/T 7714-2015 [1] Jie Yang, Tianran Wang, Chushu Zhu, et al. ACS Applied Electronic Materials, 2023(5). DOI:10.1021/acsaelm.2c01554.
MLA [1] Jie Yang, et al., ACS Applied Electronic Materials, no. 5, 2023, https://doi.org/10.1021/acsaelm.2c01554.
APA [1] Jie Yang, Tianran Wang, Chushu Zhu, Xuyuan Yin, Peitao Dong, & Xuezhong Wu. (2023). ACS Applied Electronic Materials(5). https://doi.org/10.1021/acsaelm.2c01554
IEEE [1] Jie Yang, Tianran Wang, Chushu Zhu, Xuyuan Yin, Peitao Dong, and Xuezhong Wu, ACS Applied Electronic Materials, no. 5, 2023, doi: 10.1021/acsaelm.2c01554. keywords: {rGO SAW device TNT sensing frequencyresistance PATP}