Understanding microfluidic-based gas detectors: A numerical model to investigate fundamental sensor operation, influencing phenomena and optimum geometries

Montazeri, Mahyar Mohaghegh; O’Brien, Allen; Hoorfar, Mina

doi:10.1016/j.snb.2019.126904

Cited by 9 publications

(10 citation statements)

References 31 publications

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“…A major challenge in microfluidic gas sensors was the need of careful attention to coatings, materials, channel design, and surface area for it to be used for wider applications. By customising the detectors geometry to a given application, its adaptability can be expanded, allowing it to be used for a wider variety of tasks [25]. The coatings on the device, microchannel size and geometry are the most important design considerations while developing a microfluidic gas sensor.…”

Section: Design Of a Microfluidic Gas Sensing Devicementioning

confidence: 99%

Emerging trends in microfluidic-assisted nanomaterial synthesis for their high-resolution gas sensing applications

et al. 2023

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The proliferation of point-of-use (PoU) or point-of-care (PoC) detecting technologies has resulted in a significant expansion of miniaturized sensors that were indispensable in the battle against pollution, arising contaminants, and pandemics. These sensors enable immediate identification of gases and airborne pathogens. Notwithstanding, the economical fabrication of miniature gas sensors, while maintaining their selectivity, sensitivity, and response time, presents a significant challenge. To address the aforementioned constraints, microfluidic technology has been utilized as a potential solution, rendering it a highly favorable option for PoU or PoC applications. Microfluidic-based gas sensors, while showing promising results, are still in their infancy. This review focuses on emerging trends in the synthesis of novel materials and their application is microfluidic gas sensors. Further, the challenges pertaining to this sensing and future perspective with the possible solution have been discussed.

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Section: Design Of a Microfluidic Gas Sensing Devicementioning

confidence: 99%

Emerging trends in microfluidic-assisted nanomaterial synthesis for their high-resolution gas sensing applications

et al. 2023

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“…Lately, the concept of microfluidics has been introduced to gas sensing technologies. Microfluidics deals with systems that control and transport small amount of fluids in microscale dimensions [275] . Although some claim that microfluidic-based gas detectors can be an alternative to ENs [276] , the microfluidics concept may become a big step forward for ENs with the right combinations and modifications.…”

Section: %mentioning

confidence: 99%

Electronic Nose and Its Applications: A Survey

Karakaya

Ulucan

Türkan

2019

Int. J. Autom. Comput.

248

152

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In the last two decades, improvements in materials, sensors and machine learning technologies have led to a rapid extension of electronic nose (EN) related research topics with diverse applications. The food and beverage industry, agriculture and forestry, medicine and health-care, indoor and outdoor monitoring, military and civilian security systems are the leading fields which take great advantage from the rapidity, stability, portability and compactness of ENs. Although the EN technology provides numerous benefits, further enhancements in both hardware and software components are necessary for utilizing ENs in practice. This paper provides an extensive survey of the EN technology and its wide range of application fields, through a comprehensive analysis of algorithms proposed in the literature, while exploiting related domains with possible future suggestions for this research topic.

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“…Presently, there is a growing demand for microfluidic-based gas-sensing techniques rather than traditional methods such as gas chromatography (GC) and mass spectroscopy (MS) [1][2][3][4]. A microfluidic-based gas sensor is generally composed of a single sensor at the end of a microchannel to detect different analytes [5].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the microfluidic channel provides a specific route for the gas flow and can control ambient gas parameters such as volume, flow rate and temperature [7][8][9]. Several parameters affect the gas-sensing mechanism of microfluidicbased gas sensors such as microchannel geometric design [1,10] and channel material [11]. The optimal channel design by changing the length, height and shape has a great impact on the performance of the gas sensor [1,12].…”

Section: Introductionmentioning

confidence: 99%

Gas Selectivity Enhancement Using Serpentine Microchannel Shaped with Optimum Dimensions in Microfluidic-Based Gas Sensor

et al. 2022

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A microfluidic-based gas sensor was chosen as an alternative method to gas chromatography and mass spectroscopy systems because of its small size, high accuracy, low cost, etc. Generally, there are some parameters, such as microchannel geometry, that affect the gas response and selectivity of the microfluidic-based gas sensors. In this study, we simulated and compared 3D numerical models in both simple and serpentine forms using COMSOL Multiphysics 5.6 to investigate the effects of microchannel geometry on the performance of microfluidic-based gas sensors using multiphysics modeling of diffusion, surface adsorption/desorption and surface reactions. These investigations showed the simple channel has about 50% more response but less selectivity than the serpentine channel. In addition, we showed that increasing the length of the channel and decreasing its height improves the selectivity of the microfluidic-based gas sensor. According to the simulated models, a serpentine microchannel with the dimensions W = 3 mm, H = 80 µm and L = 22.5 mm is the optimal geometry with high selectivity and gas response. Further, for fabrication feasibility, a polydimethylsiloxane serpentine microfluidic channel was fabricated by a 3D printing mold and tested according to the simulation results.

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Understanding microfluidic-based gas detectors: A numerical model to investigate fundamental sensor operation, influencing phenomena and optimum geometries

Cited by 9 publications

References 31 publications

Emerging trends in microfluidic-assisted nanomaterial synthesis for their high-resolution gas sensing applications

Emerging trends in microfluidic-assisted nanomaterial synthesis for their high-resolution gas sensing applications

Electronic Nose and Its Applications: A Survey

Gas Selectivity Enhancement Using Serpentine Microchannel Shaped with Optimum Dimensions in Microfluidic-Based Gas Sensor

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