The stability of tin and indium oxide thin film gas sensors

Papadopoulos, CA; Vlachos, DS; Avaritsiotis, JN

dc.contributor.author	Papadopoulos, CA	en
dc.contributor.author	Vlachos, DS	en
dc.contributor.author	Avaritsiotis, JN	en
dc.date.accessioned	2014-03-01T01:13:28Z
dc.date.available	2014-03-01T01:13:28Z
dc.date.issued	1997	en
dc.identifier.issn	0914-4935	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12487
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-20544449745&partnerID=40&md5=d864f2111f00e5d21f7ca41e3561ebde	en
dc.subject	Gas classification	en
dc.subject	Metal oxide thin film gas sensors	en
dc.subject	Noble metal additives	en
dc.subject	Sensor degradation	en
dc.subject	Sensor selectivity	en
dc.subject.classification	Instruments & Instrumentation	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	SURFACE	en
dc.title	The stability of tin and indium oxide thin film gas sensors	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	Tin and indium oxide reactively sputtered thin films, surface doped with palladium and platinum, are evaluated as sensors for carbon monoxide, methane, propane, n-butane and ethanol. The sensors are subjected to continuous heating to 450 degrees C - cooling to 150 degrees C cycles, in order to determine their degradation with continuous use. A simple nonparametric technique is used in order to determine the stability, interdependence and selectivity of the sensors. Useful results are obtained concerning the stability of sensors with different sensing layers and different catalysts deposited onto their surfaces. Sensors with different thicknesses of the same additive are found to be strongly correlated (i.e., they exhibit similar responses to the same test gases at the same temperatures; this is often referred to as collinearity in the sense that the response vector of one sensor can be derived from the response vector of another sensor by simply multiplying with a constant), while those with different additives are found to be uncorrelated. Finally, platinum-doped sensors were found to be selective, i.e., to exhibit different responses in the presence of different gases, while undoped or palladium-doped ones were found to be nonselective. Such results derived from simple techniques can be used to evaluate sensors incorporated in a multisensor pattern recognition array.	en
heal.publisher	MYU K K	en
heal.journalName	Sensors and Materials	en
dc.identifier.isi	ISI:A1997XY82200002	en
dc.identifier.volume	9	en
dc.identifier.issue	5	en
dc.identifier.spage	279	en
dc.identifier.epage	296	en