Acoustic Wave Gas and Vapor Sensors

Ippolito, Samuel J.; Trinchi, Adrian; Powell, David A.; Włodarski, W.

doi:10.1007/978-0-387-09665-0_8

Cited by 8 publications

(9 citation statements)

References 124 publications

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“…Acoustic wave sensors exploit the frequency change of acoustic waves (mechanical vibrations) from interactions between CO and CO sensing piezoelectric materials to detect CO [ 149 ]. Based on propagation characteristics of the acoustic waves through the piezoelectric materials, acoustic wave sensors are categorized as bulk acoustic wave (BAW) sensors and surface acoustic wave (SAW) sensors [ 149 ].…”

Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

“…Quartz crystal microbalances (QCMs) are the most commonly used BAW sensors [ 149 ]. A CO sensing layer is coated on piezoelectric materials to generate tiny mass change through CO oxidation [ 150 , 151 ] or CO absorption [ 152 ], which alters the vibrational frequency of the piezoelectric materials in succession.…”

Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

“…Surface acoustic wave (SAW) sensors have the propagation of mechanical waves confined to the surface of the medium. Therefore, SAW sensors require patterned thin-film interdigital transducers coated on the surface of piezoelectric materials to detect the acoustic waves [ 149 ]. The operation frequency of SAW sensors is much higher (up to 1 GHz) than that of BAW sensors, which results in a better sensitivity [ 149 ].…”

Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Dang

Wang

Atiyeh

2021

Sensors

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Syngas fermentation is a promising technique to produce biofuels using syngas obtained through gasified biomass and other carbonaceous materials or collected from industrial CO-rich off-gases. The primary components of syngas, carbon monoxide (CO) and hydrogen (H2), are converted to alcohols and other chemicals through an anaerobic fermentation process by acetogenic bacteria. Dissolved CO and H2 concentrations in fermentation media are among the most important parameters for successful and stable operation. However, the difficulties in timely and precise dissolved CO and H2 measurements hinder the industrial-scale commercialization of this technique. The purpose of this article is to provide a comprehensive review of available dissolved CO and H2 measurement methods, focusing on their detection mechanisms, CO and H2 cross interference and operations in syngas fermentation process. This paper further discusses potential novel methods by providing a critical review of gas phase CO and H2 detection methods with regard to their capability to be modified for measuring dissolved CO and H2 in syngas fermentation conditions.

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Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

Section: Dissolved Co Measurement Methodsmentioning

confidence: 99%

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Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Dang

Wang

Atiyeh

2021

Sensors

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“…The sensitivity and selectivity of a BAW can be tuned by chemical surface coating. The gravimetric-based measurement leads to a sensing signal, which carries information about the adsorption of analytes [ 24 ]. In recent years, rapid progress has been made in the field of gas sensing using thin film bulk acoustic resonators (FBARs) [ 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Dual-Mode Gas Sensor Composed of a Silicon Nanoribbon Field Effect Transistor and a Bulk Acoustic Wave Resonator: A Case Study in Freons

Chang

Hui²,

Wang

et al. 2018

Sensors

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In this paper, we develop a novel dual-mode gas sensor system which comprises a silicon nanoribbon field effect transistor (Si-NR FET) and a film bulk acoustic resonator (FBAR). We investigate their sensing characteristics using polar and nonpolar organic compounds, and demonstrate that polarity has a significant effect on the response of the Si-NR FET sensor, and only a minor effect on the FBAR sensor. In this dual-mode system, qualitative discrimination can be achieved by analyzing polarity with the Si-NR FET and quantitative concentration information can be obtained using a polymer-coated FBAR with a detection limit at the ppm level. The complementary performance of the sensing elements provides higher analytical efficiency. Additionally, a dual mixture of two types of freons (CFC-113 and HCFC-141b) is further analyzed with the dual-mode gas sensor. Owing to the small size and complementary metal-oxide semiconductor (CMOS)-compatibility of the system, the dual-mode gas sensor shows potential as a portable integrated sensing system for the analysis of gas mixtures in the future.

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“…One class of sensors with the potential to be a candidate for such multi-parameter determinations is the acoustic wave resonators 22 23 . Based on gravimetric detections, the sensor output is directly linear to the amount of adsorbed gas molecule and real-time sorption process can be recorded as well.…”

mentioning

confidence: 99%

Detection of Volatile Organic Compounds by Self-assembled Monolayer Coated Sensor Array with Concentration-independent Fingerprints

Chang

Tang

et al. 2016

Sci Rep

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In this paper, we have modeled and analyzed affinities and kinetics of volatile organic compounds (VOCs) adsorption (and desorption) on various surface chemical groups using multiple self-assembled monolayers (SAMs) functionalized film bulk acoustic resonator (FBAR) array. The high-frequency and micro-scale resonator provides improved sensitivity in the detections of VOCs at trace levels. With the study of affinities and kinetics, three concentration-independent intrinsic parameters (monolayer adsorption capacity, adsorption energy constant and desorption rate) of gas-surface interactions are obtained to contribute to a multi-parameter fingerprint library of VOC analytes. Effects of functional group’s properties on gas-surface interactions are also discussed. The proposed sensor array with concentration-independent fingerprint library shows potential as a portable electronic nose (e-nose) system for VOCs discrimination and gas-sensitive materials selections.

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Acoustic Wave Gas and Vapor Sensors

Cited by 8 publications

References 124 publications

Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Dual-Mode Gas Sensor Composed of a Silicon Nanoribbon Field Effect Transistor and a Bulk Acoustic Wave Resonator: A Case Study in Freons

Detection of Volatile Organic Compounds by Self-assembled Monolayer Coated Sensor Array with Concentration-independent Fingerprints

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