Mo-SAN-01 - Polymer-Coated Quartz Microbalance Array for Discriminating VOCs and Ammonia

Event

EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich

Band

Poster

Chapter

Sensor Arrays And Networks, Integrated Systems

Author(s)

F. Cortese, R. Capuano, A. Catini, C. Di Natale - Tor Vergata University of Rome,Rome (Italy), E. Stoleru, M. Brebu - “P. Poni” Institute of Macromolecular Chemistry,Iaşi (Romania)

Pages

646 - 647

DOI

10.5162/eurosensors2026/Mo-SAN-01

ISBN

978-3-910600-12-6

Price

free

Abstract

The selective detection of NO 2 in a multicomponent gas environment is still limited by the cross-sensitivity of metal oxide sensors. In this study, a ZnWO 4 -WO 3 sensor pair is created by deliberately using opposing response trends under identical gas circumstances. In the presence of reducing gases such as CH 4 and CO, the reaction rate of ZnWO 4 decreases steadily. WO ₃ has a significantly higher reaction rate than pure NO ₂ , sometimes up to 3 times higher, depending on the interferent concentration. This contrast provides a structured response space in which the same NO 2 concentration generates different responses depending on the background gas combination. The distinction makes the dataset ideal for deterministic discrimination and for machine learning algorithms for classification and concentration estimation.