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Optical chemical sensors using polythiophene derivatives as active layer for detection of volatile organic compounds

dc.contributor.authorGoncalves, V. C. [UNESP]
dc.contributor.authorBalogh, D. T.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:32:27Z
dc.date.available2014-05-20T15:32:27Z
dc.date.issued2012-02-20
dc.description.abstractSeveral studies on polythiophene gas sensors, based mainly on electrochemical and gravimetric principles can be found in the literature. However, other principles of gas detection, such as optical and thermal, are still little studied. Optical sensing is suitable for remote detection and offers great versatility at low cost. Here,we report on the use of thin films of seven polythiophene derivatives as active layer in optical sensors for the detection of six volatile organic compounds (n-hexane, toluene, tetrahydrofuran, chloroform, dichloromethane and methanol) and water vapor, in concentration range of 500-30,000 ppm. The results showed that it is possible to use different polythiophene derivatives to differentiate VOCs by optical sensing. Differentiation can be performed based on the presence or not of response to an analyte and the sensitivity value of the sensors for the analytes. Another important feature is the lack of the effect of humidity on the response of most films, which could be a major drawback in the application of these sensors. (C) 2011 Elsevier B.V. All rights reserved.en
dc.description.affiliationIQ UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUSP, IFSC, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespIQ UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipINEO/MCT (Brazil)
dc.format.extent307-312
dc.identifierhttp://dx.doi.org/10.1016/j.snb.2011.12.084
dc.identifier.citationSensors and Actuators B-chemical. Lausanne: Elsevier B.V. Sa, v. 162, n. 1, p. 307-312, 2012.
dc.identifier.doi10.1016/j.snb.2011.12.084
dc.identifier.issn0925-4005
dc.identifier.urihttp://hdl.handle.net/11449/41359
dc.identifier.wosWOS:000301214700044
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofSensors and Actuators B: Chemical
dc.relation.ispartofjcr5.667
dc.relation.ispartofsjr1,406
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectOptical sensoren
dc.subjectGas sensoren
dc.subjectConjugated polymeren
dc.subjectPolythiopheneen
dc.titleOptical chemical sensors using polythiophene derivatives as active layer for detection of volatile organic compoundsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.author.orcid0000-0002-9196-3982[2]

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