6533b839fe1ef96bd12a64a7
RESEARCH PRODUCT
Functionnalized Surface Acoustic Wave Sensors for the Detection of Hazardous Gases
Claude P. GrosMeddy VanottiChristophe TheronValentin QuesneauValérie SoumannMario NaitanaStéphane BrandèsNicolas DesboisClaude GrosThu-hoa Tran-thiVirginie Blondeau-patissiersubject
[SPI.OTHER]Engineering Sciences [physics]/OtherMaterials science[SPI.OTHER] Engineering Sciences [physics]/Other010405 organic chemistryDetection thresholdbusiness.industrySurface acoustic wavechemistry.chemical_element[CHIM.MATE]Chemical Sciences/Material chemistryTrapping010402 general chemistry01 natural sciences0104 chemical scienceschemistry.chemical_compoundchemistryHazardous wasteOptoelectronicsSurface acoustic wave sensorPorositybusinessCobaltCarbon monoxidedescription
International audience; In this work, we show the capabilities of Surface Acoustic Wave (SAW) devices to probe the properties of gas sensitive materials for the manufacturing of hazardous gas sensors. The great capabilities of cobalt corroles for the trapping of carbon monoxide (CO) were exploited to produce selective sensors. These corroles were deposited on SAW delay lines surfaces and then exposed to carbon monoxide (CO) in standard conditions. Concentrations of a few hundreds of ppb were measured emphasizing the interest of such sensors for the detection of CO. Another type of sensitive layers exhibiting specific porosity adapted to the trapping of formaldehyde (CH$_2$O) were deposited on similar delay lines. A detection threshold of 140 ppb was shown. These encouraging results pave the way for the development of a functionalized SAW sensors network for multi-gas detection in indoor air.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-10-28 |