Nanomaterial-based gas sensors used for breath diagnosis

Zhou, Xinyuan; Xue, Zhenjie; Chen, Xiangyu; Huang, Chuanhui; Bai, Wanqiao; Lu, Zhili; Wang, Tie

doi:10.1039/c9tb02518a

Cited by 173 publications

(129 citation statements)

References 143 publications

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“…According to the research carried out by Clemens et al, compounds like isoprene, acetone and methanol are expelled in the normal exhalation of breath. However in the case of certain disorders, these three main components show abnormally high or low concentration as compared to healthy volunteers [130] , [131] . Therefore high sensitivity of graphene towards gaseous molecules led to the fabrication of a gas based sensor, which can be utilized for the detection of ethanol, NH 3 , NO 2 , and O 2 [132] .…”

Section: Application Of Different Types Of Graphene Based Sensorsmentioning

confidence: 90%

Graphene based sensors

Shahdeo

Roberts

Abbineni

et al. 2020

Comprehensive Analytical Chemistry

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Section: Application Of Different Types Of Graphene Based Sensorsmentioning

confidence: 90%

Graphene based sensors

Shahdeo

Roberts

Abbineni

et al. 2020

Comprehensive Analytical Chemistry

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“…Therefore, the operating temperature optimization according to the target gases is essential for the semiconducting gas sensors. We selected CH 3 COCH 3 , NO 2 , and H 2 S as representative biomarkers of diabetes, asthma, and halitosis, respectively [26]. Figure 5a-c show the 2 × 4 sensors' response to CH 3 COCH 3 , NO 2 , and H 2 S gas over a temperatures range of 150-350 • C with a setting span of 50 • C for the precise temperature classification and efficient experimentation.…”

Section: Resultsmentioning

confidence: 99%

Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases

Kim

Park

Shin

et al. 2021

Sensors

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The breath gas analysis through gas phase chemical analysis draws attention in terms of non-invasive and real time monitoring. The array-type sensors are one of the diagnostic methods with high sensitivity and selectivity towards the target gases. Herein, we presented a 2 × 4 sensor array with a micro-heater and ceramic chip. The device is designed in a small size for portability, including the internal eight-channel sensor array. In2O3 NRs and WO3 NRs manufactured through the E-beam evaporator’s glancing angle method were used as sensing materials. Pt, Pd, and Au metal catalysts were decorated for each channel to enhance functionality. The sensor array was measured for the exhaled gas biomarkers CH3COCH3, NO2, and H2S to confirm the respiratory diagnostic performance. Through this operation, the theoretical detection limit was calculated as 1.48 ppb for CH3COCH3, 1.9 ppt for NO2, and 2.47 ppb for H2S. This excellent detection performance indicates that our sensor array detected the CH3COCH3, NO2, and H2S as biomarkers, applying to the breath gas analysis. Our results showed the high potential of the gas sensor array as a non-invasive diagnostic tool that enables real-time monitoring.

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“…The correlation between the concentration of methyl mercaptan and ammonia produced by the bacteria derived from the tongue and dental plague was found in [15]. Abnormal concentrations of ammonia in exhaled air are mainly attributed to the malfunctioning of the kidneys [17]. Kearney et al [18] used the analysis of ammonia in exhaled breath in order to detect an infection caused by the presence of Helicobacter Pylori using a fiber optic sensor.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Ammonia Gas Sensors Based on Carbon Nanomaterials

et al. 2021

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This review paper is devoted to an extended analysis of ammonia gas sensors based on carbon nanomaterials. It provides a detailed comparison of various types of active materials used for the detection of ammonia, e.g., carbon nanotubes, carbon nanofibers, graphene, graphene oxide, and related materials. Different parameters that can affect the performance of chemiresistive gas sensors are discussed. The paper also gives a comparison of the sensing characteristics (response, response time, recovery time, operating temperature) of gas sensors based on carbon nanomaterials. The results of our tests on ammonia gas sensors using various techniques are analyzed. The problems related to the recovery of sensors using various approaches are also considered. Finally, the impact of relative humidity on the sensing behavior of carbon nanomaterials of various different natures was estimated.

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Nanomaterial-based gas sensors used for breath diagnosis

Abstract: Gas-sensing applications commonly use nanomaterials (NMs) because of their unique physicochemical properties, including a high surface-to-volume ratio, enormous number of active sites, controllable morphology, and potential for miniaturisation.

Cited by 173 publications

References 143 publications

Graphene based sensors

Graphene based sensors

Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases

Recent Advances in Ammonia Gas Sensors Based on Carbon Nanomaterials

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