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This work concerns with metal oxide (MOX) gas sensors based on nanowires and thin films. We focus on chemical warfare agents (CWAs) detection to compare these materials from the functional point-of-view. We work with different chemicals including simulants for Sarin nerve agents, vescicant gases, cyanide agents, and analytes such as ethanol, acetone, ammonia, and carbon monoxide that can be produced by everyday activities causing false alarms. Explorative data analysis has been used to demonstrate the different sensing performances of nanowires and thin films. Within the chosen application, our analysis reveal that the introduction of nanowires inside the array composed by thin films can improve its sensing capability. Cyanide simulants have been detected at concentrations close to 1 ppm, lower than the Immediately Dangerous for Life and Health (IDLH) value of the respective warfare agent. Higher …
Publication date: 
23 May 2008

Andrea Ponzoni, Camilla Baratto, Sebastiano Bianchi, Elisabetta Comini, Matteo Ferroni, Matteo Pardo, Marco Vezzoli, Alberto Vomiero, Guido Faglia, Giorgio Sberveglieri

Biblio References: 
Volume: 8 Issue: 6 Pages: 735-742
IEEE Sensors Journal