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The possible use of nanostructured silicon carbide for the manufacturing of chemiresistive gas sensors with high selectivity towards sulfur dioxide has been recently explored. In this work, we take this topic a step further with an in-depth investigation on the role played by the oxidation process occurring on the surface of silicon carbide nanoparticles during the detection of SO2. This study starts by understanding the oxidation process at different temperatures and subsequently investigates the reaction mechanism of SO2, in both dry and wet atmosphere, at the optimal working temperature for the sensor operation. The device was characterized using a diffuse reflectance infrared Fourier transform spectroscopy setup capable of working in operando conditions with a dedicated electronics for the simultaneous monitoring of surface chemical reactions on the sensing film together with its electrical activity. This work …
Publication date: 
15 Nov 2022

Michele Della Ciana, Matteo Valt, Barbara Fabbri, Andrea Gaiardo, Elena Spagnoli, Soufiane Krik, Paolo Bernardoni, Nicola Gilli, Andrea Migliori, Alberto Quaranta, Vittorio Morandi, Vincenzo Guidi

Biblio References: 
Volume: 371 Pages: 132497
Sensors and Actuators B: Chemical