Theory, design and operation of a surface acoustic wave hydrogen sulfide microsensor

Galipeau, J.; Falconer, R.S.; Vetelino, J.F.; Caron, J.J.; Wittman, E.L.; Schweyer, M.G.; Andle, J.C.

doi:10.1016/0925-4005(94)01313-6

Cited by 25 publications

(10 citation statements)

References 9 publications

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“…4a) Generally, the origin of the frequency shift in SAW gas sensors depends mainly on the following three factors: mass loading, changes in elasticity and acousto-electric interaction. The equation representing these three contributions is given as [37]: (Fig. 8b).…”

Section: Resultsmentioning

confidence: 99%

Colloidal quantum dot-based surface acoustic wave sensors for NO2-sensing behavior

Kan

Chen

et al. 2019

Sensors and Actuators B: Chemical

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Section: Resultsmentioning

confidence: 99%

Colloidal quantum dot-based surface acoustic wave sensors for NO2-sensing behavior

Kan

Chen

et al. 2019

Sensors and Actuators B: Chemical

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“…They are widely used in hydrogen-related technologies such as fuel cell, batteries and H 2 sensors. Gold has been found to be sensitive to odorous gases containing thiol vapor and H 2 S [68,69].…”

Section: Metal Nanoparticle/nanocluster Functionalized Cnt Gas Sensorsmentioning

confidence: 99%

Recent progress in carbon nanotube-based gas sensors

et al. 2008

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The development of carbon nanotube-(CNTs-)based gas sensors and sensor arrays has attracted intensive research interest in the last several years because of their potential for the selective and rapid detection of various gaseous species by novel nanostructures integrated in miniature and low-power consuming electronics. Chemiresistors and chemical field effect transistors are probably the most promising types of gas nanosensors. In these sensors, the electrical properties of nanostructures are dramatically changed when exposed to the target gas analytes. In this review, recent progress on the development of different types of CNT-based nanosensors is summarized. The focus was placed on the means used by various researchers to improve the sensing performance (sensitivity, selectivity and response time) through the rational functionalization of CNTs with different methods (covalent and non-covalent) and with different materials (polymers and metals).

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“…Galipeau et al [15] reported a SAW H2S sensor using WO3 as the sensitive layer, and it achieved a response of ~600 Hz to 0.25 ppm H2S. These studies [10][11][12][13][14][15][16][17] have all concluded that the key sensing mechanism of the sensors are the changes of the weight (mass loading effect) and electrical conductivity (electrical loading effect) of the sensing layers when the sensor is exposed to H2S gas. However, as we know, there is another important sensing mechanism, i.e., the changes of elastic modulus (elastic loading effect), which has seldomly been investigated or explored for H2S gas sensing using the SAW technique.…”

Section: Introductionmentioning

confidence: 99%

ZnO-Al2O3 nanocomposite as a sensitive layer for high performance surface acoustic wave H2S gas sensor with enhanced elastic loading effect

Tang

Han

et al. 2020

Sensors and Actuators B: Chemical

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ZnO-Al2O3 nanocomposite was synthesized and developed as a high performance sensitive and selective layer for surface acoustic wave (SAW) sensor, aiming for in-situ detection of H2S gas in ppb level operated at room temperature. ZnO-Al2O3 nanocomposite, synthesized though a sol-gel method, was spin-coated onto a quartz based SAW resonator. This composite layer inherits the mesoporous structure of the Al2O3 layer and good affinity to H2S gas molecules of the ZnO layer, and thus can selectively adsorb and react with H2S gas molecules to form ZnS compounds on its surface. This reaction leads to significant decreases of both pore sizes and total pore volume of the layer, an increase of layer's elastic modulus, thus causing a large positive shift of the frequency responses of the SAW sensor. The sensor operated at room temperature shows a frequency response of ~500 Hz to 10 ppb H2S, with an excellent selectivity and good recovery property.

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Theory, design and operation of a surface acoustic wave hydrogen sulfide microsensor

Cited by 25 publications

References 9 publications

Colloidal quantum dot-based surface acoustic wave sensors for NO2-sensing behavior

Colloidal quantum dot-based surface acoustic wave sensors for NO2-sensing behavior

Recent progress in carbon nanotube-based gas sensors

ZnO-Al2O3 nanocomposite as a sensitive layer for high performance surface acoustic wave H2S gas sensor with enhanced elastic loading effect

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