The stability, sensitivity and response transients of ZnO, SnO2 and WO3 sensors under acetone, toluene and H2S environments

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dc.contributor.authorLee, Inkunko
dc.contributor.authorChoi, Seonjinko
dc.contributor.authorPark, Kwang Minko
dc.contributor.authorLee, Sun Sookko
dc.contributor.authorChoi, Sunghoko
dc.contributor.authorKim, Il-Dooko
dc.contributor.authorPark, C. Oko
dc.date.accessioned2014-08-29T04:17:25Z-
dc.date.available2014-08-29T04:17:25Z-
dc.date.created2014-06-03-
dc.date.created2014-06-03-
dc.date.issued2014-07-
dc.identifier.citationSENSORS AND ACTUATORS B-CHEMICAL, v.197, no.5, pp.300 - 307-
dc.identifier.issn0925-4005-
dc.identifier.urihttp://hdl.handle.net/10203/189040-
dc.description.abstractChemoresistive H2S sensors using various oxide nanoparticles were prepared and heat-treated at 600 degrees C in an effort to define halitosis in human breath. WO3, ZnO, and SnO2 were tested as sensing materials, among which WO3 showed the highest stability to H2S. XPS analysis showed a metal sulfate peak on the surface of ZnO and SnO2, which causes a recovery problem after 2 ppm H2S exposure. On the contrary, the WO3 sensor showed a stable signal in long-term operation in the presence of H2S gas. WO3 gas sensors decorated with various catalytic metals were fabricated to investigate their sensing properties in the 0.2-5 ppm H2S range with 80% relative humidity (RH). A 0.03 wt% Au-doped WO3 sensor exhibited excellent H2S sensitivity (R-air/R-gas = 12.40 at 2 ppm) toward H2S, whereas pure WO3 showed a sensitivity of 4.85 with negligible interference from the volatile organic compounds (VOCs).-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE SA-
dc.subjectGAS-SENSING PROPERTIES-
dc.subjectHYDROGEN-SULFIDE-
dc.subjectSELECTIVE DETECTION-
dc.subjectLOW-TEMPERATURE-
dc.subjectLUNG-CANCER-
dc.subjectBREATH-
dc.subjectOXIDE-
dc.subjectFILM-
dc.titleThe stability, sensitivity and response transients of ZnO, SnO2 and WO3 sensors under acetone, toluene and H2S environments-
dc.typeArticle-
dc.identifier.wosid000334753200040-
dc.identifier.scopusid2-s2.0-84897033919-
dc.type.rimsART-
dc.citation.volume197-
dc.citation.issue5-
dc.citation.beginningpage300-
dc.citation.endingpage307-
dc.citation.publicationnameSENSORS AND ACTUATORS B-CHEMICAL-
dc.identifier.doi10.1016/j.snb.2014.02.043-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorKim, Il-Doo-
dc.contributor.localauthorPark, C. O-
dc.contributor.nonIdAuthorLee, Sun Sook-
dc.contributor.nonIdAuthorChoi, Sungho-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorH2S sensor-
dc.subject.keywordAuthorWO3-
dc.subject.keywordAuthorSnO2-
dc.subject.keywordAuthorZnO-
dc.subject.keywordAuthorStability-
dc.subject.keywordAuthorSensitivity-
dc.subject.keywordPlusGAS-SENSING PROPERTIES-
dc.subject.keywordPlusHYDROGEN-SULFIDE-
dc.subject.keywordPlusSELECTIVE DETECTION-
dc.subject.keywordPlusLOW-TEMPERATURE-
dc.subject.keywordPlusLUNG-CANCER-
dc.subject.keywordPlusBREATH-
dc.subject.keywordPlusOXIDE-
dc.subject.keywordPlusFILM-
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