Functionnalized Surface Acoustic Wave Sensors for the Detection of Hazardous Gases

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

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

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.

Domaines: Matériaux

Claude P. Gros, Meddy Vanotti, Christophe Theron, Valentin Quesneau, Valérie Soumann, et al.. Functionnalized Surface Acoustic Wave Sensors for the Detection of Hazardous Gases. 2018 IEEE SENSORS, Oct 2018, New Delhi, India. pp.1-4, ⟨10.1109/ICSENS.2018.8589669⟩. ⟨cea-02367537⟩