A silver electrode based surface acoustic wave (SAW) mercury vapor sensor: a physio-chemical and analytical investigation

Kabir, K.M. Mohibul; Sabri, Ylias M.; Lay, Bebeto; Ippolito, Samuel J.; Bhargava, Suresh K.

doi:10.1039/c6ra03148j

Cited by 13 publications

(5 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensing mechanisms of BAW and SAW sensors rely on the adsorption process, which takes place on the sensor surface in presence of gas molecules at a certain operating temperature [91] . This adsorption process leads to mass loading, which will then cause the resonant frequency drift of the resonator sensor.…”

Section: Temperature Effect On Acoustic Wave-based Gas Sensor 421 Tmentioning

confidence: 99%

High‐Temperature Gas Sensors for Harsh Environment Applications: A Review

Ghosh

Zhang

Hai-feng

2019

CLEAN Soil Air Water

View full text Add to dashboard Cite

This review paper introduces various types of gas sensors operating at high temperatures and their mechanisms, which can provide solutions to gas sensor selection for harsh environment application. Most of the gas sensors are found to be functioning at moderate operating temperatures (<400°C) and only a few reports are available, which highlight gas-sensing performance above 400°C. Therefore, the selection of a more reliable high-temperature gas sensor is necessary and advantageous for applications in areas such as agricultural waste processes (such as pyrolysis processes), military facilities, nuclear power plants, and automobile industries. In this paper, three major parts have been conducted to address the importance of high-temperature gas sensors and provide strategical solution for gas sensor selection. First, we have highlighted the application scenario and the sensing mechanism of various gas sensors operating at high temperature. Additionally, factors that affect sensing performance at moderate operating temperature have been investigated. Secondly, we have discussed the effect of material compositions, morphology of the nanostructures, and the use of dopants on sensing performance of high temperature gas sensors. Meanwhile, the catalytic nature of the sensing layer and temperature effect on chemisorption in oxide-based sensors have been discussed meticulously. Lastly, future challenges including factors affecting various sensor performance, selection, and preparation of sensing materials operating at higher temperatures are explored systematically.

show abstract

Section: Temperature Effect On Acoustic Wave-based Gas Sensor 421 Tmentioning

confidence: 99%

High‐Temperature Gas Sensors for Harsh Environment Applications: A Review

Ghosh

Zhang

Hai-feng

2019

CLEAN Soil Air Water

View full text Add to dashboard Cite

show abstract

“…34 The silver nanoparticles obtained by NADH-mediated synthesis have the highest sensitivity compared to other silver nanoparticle-based sensors for mercuric ions. [35][36][37][38][39][40]…”

Section: Resultsmentioning

confidence: 99%

Enhanced sensing of mercuric ions based on dinucleotide-functionalized silver nanoparticles

Maduraiveeran

Ramaraj

2016

Anal. Methods

View full text Add to dashboard Cite

show abstract

“…A surface acoustic wave is stimulated with a time-varying electric field that deforms the piezoelectric material through an inverse-piezoelectric effect. When gas molecules pass through the sensing area, which is a coated polymer film such as PVB or poly-4-vinylpyridine (P4VP), gas molecules form a weak van der Waals bond with the polymer film, thus becoming adsorbed on that film and causing a velocity change [18].…”

Section: Methodsmentioning

confidence: 99%

Discrimination of Red Wines with a Gas-Sensor Array Based on a Surface-Acoustic-Wave Technique

Lin

Yao

2019

Micromachines

View full text Add to dashboard Cite

We applied a thermal-desorption gas-chromatograph mass-spectrometer (TD-GC–MS) system to identify the marker volatile organic compounds (VOCs) in the aroma of red wine. After obtaining the marker VOC, we utilized surface acoustic waves (SAWs) to develop a highly sensitive sensing system as ‘electronic nose’ to detect these marker VOC. The SAW chips were fabricated on a LiNbO3 substrate with a lithographic process. We coated sensing polymers on the sensing area to adsorb the marker VOC in a sample gas. The adsorption of the marker VOC altered the velocity of the SAW according to a mass-loading effect, causing a frequency decrease. This experiment was conducted with wines of three grape varieties—cabernet sauvignon, merlot and black queen. According to the results of TD-GC–MS, the King brand of red wine is likely to have unique VOC, which are 2-pentanone, dimethyl disulfide, 2-methylpropyl acetate and 2-pentanol; Blue Nun-1 probably has a special VOC such as 2,3-butanedione. We hence used a SAW sensor array to detect the aroma of red wines and to distinguish their components by their frequency shift. The results show that the use of polyvinyl butyral (PVB) as a detecting material can distinguish Blue Nun-2 from the others and the use of polyvinyl alcohol (PVA) can distinguish King from the others. We conducted random tests to prove the accuracy and the reliability of our SAW sensors.

show abstract

A silver electrode based surface acoustic wave (SAW) mercury vapor sensor: a physio-chemical and analytical investigation

Abstract: In this study, a surface acoustic wave based Hg0 vapour sensor was developed where Ag IDT electrodes were employed as lone sensing elements.

Cited by 13 publications

References 55 publications

High‐Temperature Gas Sensors for Harsh Environment Applications: A Review

High‐Temperature Gas Sensors for Harsh Environment Applications: A Review

Enhanced sensing of mercuric ions based on dinucleotide-functionalized silver nanoparticles

Discrimination of Red Wines with a Gas-Sensor Array Based on a Surface-Acoustic-Wave Technique

Contact Info

Product

Resources

About