Selective detection of VOCs using microfluidic gas sensor with embedded cylindrical microfeatures coated with graphene oxide

Ghazi, Mahan; Janfaza, Sajjad; Tahmooressi, Hamed; Tasnim, Nishat; Hoorfar, Mina

doi:10.1016/j.jhazmat.2021.127566

Cited by 36 publications

(20 citation statements)

References 53 publications

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“…Increasing the surface area of the microfluidic channel can also increase the sensor’s selectivity. Ghazi et al reported using microfluidic channels with micro and nanofeatures and a MOS sensor [ 16 ]. The schematic and the microscopic image of these microfeatures are shown in Figure 1 E,F.…”

Section: Microfluidic Channel Parametersmentioning

confidence: 99%

Microfluidic Gas Sensors: Detection Principle and Applications

et al. 2022

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With the rapid growth of emerging point-of-use (POU)/point-of-care (POC) detection technologies, miniaturized sensors for the real-time detection of gases and airborne pathogens have become essential to fight pollution, emerging contaminants, and pandemics. However, the low-cost development of miniaturized gas sensors without compromising selectivity, sensitivity, and response time remains challenging. Microfluidics is a promising technology that has been exploited for decades to overcome such limitations, making it an excellent candidate for POU/POC. However, microfluidic-based gas sensors remain a nascent field. In this review, the evolution of microfluidic gas sensors from basic electronic techniques to more advanced optical techniques such as surface-enhanced Raman spectroscopy to detect analytes is documented in detail. This paper focuses on the various detection methodologies used in microfluidic-based devices for detecting gases and airborne pathogens. Non-continuous microfluidic devices such as bubble/droplet-based microfluidics technology that have been employed to detect gases and airborne pathogens are also discussed. The selectivity, sensitivity, advantages/disadvantages vis-a-vis response time, and fabrication costs for all the microfluidic sensors are tabulated. The microfluidic sensors are grouped based on the target moiety, such as air pollutants such as carbon monoxide and nitrogen oxides, and airborne pathogens such as E. coli and SARS-CoV-2. The possible application scenarios for the various microfluidic devices are critically examined.

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Section: Microfluidic Channel Parametersmentioning

confidence: 99%

Microfluidic Gas Sensors: Detection Principle and Applications

et al. 2022

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“…Then, the xylene was used to provide a chemically inert barrier layer. (2) The modified microchannel was coated with GO to improve the specific surface area to volume ratio of the micro-features [ 87 ]. The performance was improved.…”

Section: Gas Monitoring For Medical Diagnosismentioning

confidence: 99%

“… ( a ) Schematic illustration of the microfluidic gas sensor; ( b ) the sensing intensity of the microfluidic gas sensor for different VOCs [ 87 ]. Copyright (2022), used with permission from the American Chemical Society.…”

Section: Figurementioning

confidence: 99%

Research Progress of Graphene and Its Derivatives towards Exhaled Breath Analysis

Yang

Tian

et al. 2022

Biosensors

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The metabolic process of the human body produces a large number of gaseous biomarkers. The tracking and monitoring of certain diseases can be achieved through the detection of these markers. Due to the superior specific surface area, large functional groups, good optical transparency, conductivity and interlayer spacing, graphene, and its derivatives are widely used in gas sensing. Herein, the development of graphene and its derivatives in gas-phase biomarker detection was reviewed in terms of the detection principle and the latest detection methods and applications in several common gases, etc. Finally, we summarized the commonly used materials, preparation methods, response mechanisms for NO, NH3, H2S, and volatile organic gas VOCs, and other gas detection, and proposed the challenges and prospective applications in this field.

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“…Clinical experiments have shown the potential for utilizing breath to diagnose major diseases, including many forms of cancer, diabetes, multiple sclerosis, and kidney disease [ 181 ]. The invention and widespread use of solid-state gas sensors have offered an additional boost to the interest in VOC inspection and analysis for medical applications [ 182 ]. Semiconducting gas sensors are employed to test certain gases, such as hydrogen peroxide [ 183 ], acetone [ 184 ], ammonia [ 185 ], nitric oxide [ 186 ], and volatile sulfur [ 187 ], from human bodies.…”

Section: Potential Biomedical Applicationmentioning

confidence: 99%

Semiconductor Multimaterial Optical Fibers for Biomedical Applications

et al. 2022

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Integrated sensors and transmitters of a wide variety of human physiological indicators have recently emerged in the form of multimaterial optical fibers. The methods utilized in the manufacture of optical fibers facilitate the use of a wide range of functional elements in microscale optical fibers with an extensive variety of structures. This article presents an overview and review of semiconductor multimaterial optical fibers, their fabrication and postprocessing techniques, different geometries, and integration in devices that can be further utilized in biomedical applications. Semiconductor optical fiber sensors and fiber lasers for body temperature regulation, in vivo detection, volatile organic compound detection, and medical surgery will be discussed.

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Selective detection of VOCs using microfluidic gas sensor with embedded cylindrical microfeatures coated with graphene oxide

Cited by 36 publications

References 53 publications

Microfluidic Gas Sensors: Detection Principle and Applications

Microfluidic Gas Sensors: Detection Principle and Applications

Research Progress of Graphene and Its Derivatives towards Exhaled Breath Analysis

Semiconductor Multimaterial Optical Fibers for Biomedical Applications

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