Surface Acoustic Wave Sensors for the Detection of Hazardous Compounds in Indoor Air

Meddy Vanotti (1) , Christophe Theron (2) , Sacha Poisson (1) , Valentin Quesneau (3) , Mario Naitana (3) , Valérie Soumann (1) , Stéphane Brandès (3) , Nicolas Desbois (3) , Claude Gros (3) , Thu-Hoa Tran-Thi (2) , Virginie Blondeau-Patissier (1)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 LEDNA - Laboratoire Edifices Nanométriques
3 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

In this work, the authors show the capabilities of Surface Acoustic Wave (SAW) devices coupled with various absorbents 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.

Keywords: Love waves; cobalt corroles; Nano-porous films; carbon monoxide; formaldehyde; SAW

Domains: Chemical Sciences; Material chemistry

Meddy Vanotti, Christophe Theron, Sacha Poisson, Valentin Quesneau, Mario Naitana, et al.. Surface Acoustic Wave Sensors for the Detection of Hazardous Compounds in Indoor Air. Proceedings, 2017, 1, pp.444. ⟨10.3390/proceedings1040444⟩. ⟨cea-01578211⟩