Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Yang, Jie; Wang, Tianran; Gao, Weiye; Zhu, Chushu; Yin, Xuyuan; Dong, Pinliang; Wu, Xuezhong

doi:10.1021/acsanm.2c02224

Cited by 5 publications

(3 citation statements)

References 56 publications

(83 reference statements)

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“…For example, Liu et al 27 reported a PATP-modified silver nanoparticle coupled with rGO for ultrasensitive recognition of TNT molecules. Yang et al 26,29 verified the strong capture performance of PATP and used gold nanorods to couple GO to connect more PATP with a detection limit (DL) as low as 40 ppb. In previous work, researchers often drop-or spin-coat a sensitive film onto the sensing area of the SAW device, which leads to nonreproducible fabrication of the sensors.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Liu et al reported a PATP-modified silver nanoparticle coupled with rGO for ultrasensitive recognition of TNT molecules. Yang et al , verified the strong capture performance of PATP and used gold nanorods to couple GO to connect more PATP with a detection limit (DL) as low as 40 ppb. In previous work, researchers often drop- or spin-coat a sensitive film onto the sensing area of the SAW device, which leads to nonreproducible fabrication of the sensors. , In addition, the SAW device with single-signal (frequency) display was prone to signal “false positives” when detecting low concentrations of the substance to be tested, which was not conducive to the engineering promotion of the sensors.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Wang

Zhu

et al. 2023

ACS Appl. Electron. Mater.

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Yang

Wang

Zhu

et al. 2023

ACS Appl. Electron. Mater.

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“…In addition, SAW sensors based on graphene and their composites are also sensitive to other species such as humidity [43,44], NO [45] and TNT [46].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity H2 and CH4 SAW Sensors with Carbon Nanowalls and Improvement in Their Performance after Plasma Treatment

Vizireanu,

Constantinoiu,

Satulu

et al. 2023

Chemosensors

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We have developed surface acoustic wave (SAW) sensors with high sensitivity and a reversible response at room temperature (RT). The sensitive area of the sensor was prepared from vertically aligned graphene sheets, like carbon nanowalls (CNWs), which were deposited onto the quartz SAW sensor substrate. The CNWs were obtained by RF plasma-enhanced chemical vapor deposition (PECVD) at 600 °C, and their sensitivity was subsequently enhanced through hydrogen plasma treatment. The SAW sensors were tested at H2 and CH4 at RT, and they exhibited a reversible response for both gases at concentrations between 0.02% and 0.1%, with a detection limit of a few ppm. The additional hydrogen plasma treatment preserved the lamellar structure, with slight modifications to the morphology of CNW edges, as observed by scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) investigations revealed the presence of new functional groups, a significant number of defects and electron transitions after the treatment. Changes in the chemical state on the CNW surface are most probably responsible for the improved gas adsorption after plasma treatment. These results identify CNWs as a promising material for designing new SAW sensors, with the possibility of using plasma treatments to enhance the detection limit below the ppm level.

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Chemical Sensors Based on Graphene and 2D Graphene Analogs

Lee

Cho

Jang

2023

Advanced Sensor Research

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The outbreak of the global pandemic has aroused significant attention from the public for healthy living environments. From this point of view, chemical sensors are crucial since these devices or actuators have diverse applications, such as environmental monitoring, food safety, industry, and healthcare. The development of chemical sensors may substitute human senses and precisely identify unspecified substances or discriminate materials accurately. For the implementation of chemical sensors utilized in daily life, there are requirements such as portability, low cost, low power consumption, high selectivity, and sensitivity. The most adequate materials are 2D materials that exactly agree with the described conditions. 2D materials have been studied for sensor applications owing to their unique material characteristics specialized for detecting particular substances. High surface to volume ratio or numerous reaction sites are representative physical properties of 2D materials. Furthermore, high carrier mobility is a typical feature of these substances appropriate for manufacturing advanced chemical sensors. Herein, the history and recent advances of 2D material‐based chemical sensors along with a description of perspectives and future challenges are introduced. This review provides a guideline for preparing chemical sensors based on 2D materials as next‐generation sensing devices.

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Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Cited by 5 publications

References 56 publications

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

High-Sensitivity H2 and CH4 SAW Sensors with Carbon Nanowalls and Improvement in Their Performance after Plasma Treatment

Chemical Sensors Based on Graphene and 2D Graphene Analogs

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