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dc.contributor.authorMoon, Hi Gyu-
dc.contributor.authorJang, Ho Won-
dc.contributor.authorKim, Jin-Sang-
dc.contributor.authorPark, Hyung-Ho-
dc.contributor.authorYoon, Seok-Jin-
dc.date.accessioned2024-01-20T18:03:45Z-
dc.date.available2024-01-20T18:03:45Z-
dc.date.created2021-09-05-
dc.date.issued2010-12-
dc.identifier.issn1738-8090-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/130888-
dc.description.abstractWe investigate the mechanism of the sensitivity enhancement in TiO2 hollow-hemisphere gas sensors. Using monolayer close-packed polystyrene microspheres as a sacrificial template, a TiO2 thin film based on a network of ordered hollow hemispheres is formed by room-temperature sputtering deposition and subsequent calcination at 550 degrees C. A thin film gas sensor based on the TiO2 hollow hemispheres exhibits a 225% change in its resistance when exposed to 50 ppm CO at 250 degrees C, whereas a gas sensor based on a flat TiO2 film shows an 85% change. Numerical analysis reveals that the enhancement of the gas sensitivity in the hollow-hemisphere gas sensor is simply the result of an increase in the effective surface area for the adsorption of gas molecules.-
dc.languageEnglish-
dc.publisherKOREAN INST METALS MATERIALS-
dc.subjectTHIN-FILMS-
dc.subjectTITANIA-
dc.titleMechanism of the Sensitivity Enhancement in TiO2 Hollow-Hemisphere Gas Sensors-
dc.typeArticle-
dc.identifier.doi10.3365/eml.2010.12.135-
dc.description.journalClass1-
dc.identifier.bibliographicCitationELECTRONIC MATERIALS LETTERS, v.6, no.4, pp.135 - 139-
dc.citation.titleELECTRONIC MATERIALS LETTERS-
dc.citation.volume6-
dc.citation.number4-
dc.citation.startPage135-
dc.citation.endPage139-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.description.journalRegisteredClasskci-
dc.description.journalRegisteredClassother-
dc.identifier.kciidART001505918-
dc.identifier.wosid000286039600001-
dc.identifier.scopusid2-s2.0-78650986146-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.relation.journalResearchAreaMaterials Science-
dc.type.docTypeArticle-
dc.subject.keywordPlusTHIN-FILMS-
dc.subject.keywordPlusTITANIA-
dc.subject.keywordAuthorgas sensors-
dc.subject.keywordAuthorTiO2-
dc.subject.keywordAuthorhollow hemispheres-
dc.subject.keywordAuthoreffective surface area-
dc.subject.keywordAuthorCO-
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