Metal oxide nanowire and thin-film-based gas sensors for chemical warfare simulants detection
Year: 2008
Authors: Ponzoni A., Baratto C., Bianchi S., Comini E., Ferroni M., Pardo M., Vezzoli M., Vomiero A., Faglia G., Sberveglieri G.
Autors Affiliation: Univ Brescia, Dept Chem & Phys, CNR INFM SENSOR Lab, I-25133 Brescia, Italy.
Abstract: 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 sensitivity has been obtained to simulants for Sarin and vescicant gases, which have been detected at concentrations close or even lower than 100 ppb. Results demonstrate the suitability of the proposed array to selectively detect CWA simulants with respect to some compounds produced by everyday activities.
Journal/Review: IEEE SENSORS JOURNAL
Volume: 8 (5-6) Pages from: 735 to: 742
More Information: Manuscript received Decdember 30, 2007; revised February 25, 2008; accepted February 26, 2008. This work was supported in part by the European Strep Project 001528 Nanostructared Solid-State Gas Sensors With Superior Performance (NANOS4) and in part by the NATO Project 982166 Chemical Threat Detectors Based on Multisensor Arrays and Selective Porous Concentrators. The associate editor coordinating the review of this paper and approving it for publication was Dr. Janet Jensen.KeyWords: chemical warfare agents (CWAs); DMMP; explorative data analysis; MOS devices; nanowires; thin filmsDOI: 10.1109/JS EN.2008.923179ImpactFactor: 1.610Citations: 50data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-10References taken from IsiWeb of Knowledge: (subscribers only)
