Organization of polythiophenes at ultrathin films mixed with stearic acid investigated with polarization-modulation infrared reflection–absorption spectroscopy

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dc.contributor.authorSilva, Edilene Assunção da [UNESP]
dc.contributor.authorCaseli, Luciano
dc.contributor.authorOlivati, Clarissa de Almeida [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2018-12-11T17:12:56Z
dc.date.available2018-12-11T17:12:56Z
dc.date.issued2017-09-20
dc.description.abstractIn this present work, the polymers poly(3-alkylthiophene)s, regioregular poly(3-butylthiophene), poly(3-hexylthiophene) and poly(3-octylthiophene) were spread at the air-water interface to form Langmuir monolayers. They formed stable films by mixing them with Stearic Acid (SA), as confirmed with surface pressure-area isotherms and polarization-modulation infrared reflection–absorption spectroscopy (PM-IRRAS). The floating monolayers were transferred from the liquid interface to solid supports by using the Langmuir-Blodgett (LB) and Langmuir-Schaeffer (LS) techniques, and characterized with PM-IRRAS. Surface pressure-area isotherms showed that SA monolayers are expanded upon polymer incorporation altering the rheological properties of the monolayer since the monolayer became less elastic at higher pressures and presented first-order transitions at lower pressures. PM-IRRAS showed that the organization of the films is affected at the molecular level depending on the chemical structure of the polymer chosen. Among the polymers analysed, the poly(3-butylthiophene) shows a more irregular conformational behaviour depending on the amount of stearic acid. The conformation of the films when transferred to solid support changes and is dependent on the type of deposition (LB or LS). The importance of this paper relies on the fact that SA can be employed to help the formation of stable floating monolayers of these polythiophenes at the air-water interface, and the successful transfer to solid supports may provide nanostructured films with a high control of their molecular properties, which may enable a molecular architecture to be applied as electronic devices of interest.en
dc.description.affiliationLaboratório de Optoeletrônica e Filmes Finos Departamento de Fìsica Faculdade de Ciências e Tecnologia UNESP, Rua Roberto Simonsen, 305
dc.description.affiliationLaboratório de Materiais Híbridos Departamento de Ciências Exatas e da Terra Universidade Federal de São Paulo UNIFESP, Rua São Nicolau, 210
dc.description.affiliationUnespLaboratório de Optoeletrônica e Filmes Finos Departamento de Fìsica Faculdade de Ciências e Tecnologia UNESP, Rua Roberto Simonsen, 305
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent628-633
dc.identifierhttp://dx.doi.org/10.1016/j.colsurfa.2017.06.035
dc.identifier.citationColloids and Surfaces A: Physicochemical and Engineering Aspects, v. 529, p. 628-633.
dc.identifier.doi10.1016/j.colsurfa.2017.06.035
dc.identifier.issn1873-4359
dc.identifier.issn0927-7757
dc.identifier.lattes9822212808651415
dc.identifier.orcid0000-0002-0114-6795
dc.identifier.scopus2-s2.0-85021301194
dc.identifier.urihttp://hdl.handle.net/11449/174802
dc.language.isoeng
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.relation.ispartofsjr0,753
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectLangmuir-Blodgett films
dc.subjectLangmuir-Schaefer films
dc.subjectMonolayers
dc.subjectPM-IRRAS
dc.subjectPolyalkylthiophenes
dc.subjectStearic acid
dc.titleOrganization of polythiophenes at ultrathin films mixed with stearic acid investigated with polarization-modulation infrared reflection–absorption spectroscopyen
dc.typeArtigo
unesp.author.lattes9822212808651415[3]
unesp.author.orcid0000-0002-0114-6795[3]

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