Photopyroelectric spectroscopy of polyaniline films

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Viçosa (UFV)-
Autor(es): dc.creatorDe Albuquerque, J. E.-
Autor(es): dc.creatorMelo, W. L.B.-
Autor(es): dc.creatorFaria, R. M.-
Data de aceite: dc.date.accessioned2025-08-21T18:09:37Z-
Data de disponibilização: dc.date.available2025-08-21T18:09:37Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2000-05-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/(SICI)1099-0488(20000515)38:10<1294-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/224166-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/224166-
Descrição: dc.descriptionPhotopyroelectric spectroscopy (PPES), in the 400<λ<900 nm wavelength range, was used to study thermal properties of differently doped polyaniline (PAN) films. The photopyroelectric intensity signal Vn(λ) and its phase Fn(λ) were independently measured, as well as the intensity Vn(f) and the phase Fn(f) (f being the chopping frequency) for a given λ of the saturation part of the PPES spectrum. Equations of both the intensity and the phase of the PPES signal, taking into account the thermal and the optical characteristics of the PAN films and the pyroelectric detector, were used to fit the experimental results. From the fittings we obtained, with great accuracy, the values of thermal conductivity κ and thermal diffusivity coefficient α of PAN films of different doping degrees. It was observed that, in contrast with the strong doping-dependence of the electrical conductivity, the thermal parameters of PAN films remained practically unchanged under doping. This apparent discrepancy is explained by the granular metal model of doped PAN.-
Descrição: dc.descriptionInst. de Fis. de São Carlos Universidade de São Paulo, C.P. 369, 13560-270 São Carlos-
Descrição: dc.descriptionDepto. de Engenharia Elétrica UNESP, 15378-000 Ilha Solteira-
Descrição: dc.descriptionDepartamento de Física Univ. Federal de Viçosa, 36571-000, Viçosa, MG-
Descrição: dc.descriptionDepto. de Engenharia Elétrica UNESP, 15378-000 Ilha Solteira-
Formato: dc.format1294-1300-
Idioma: dc.languageen-
Relação: dc.relationJournal of Polymer Science, Part B: Polymer Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titlePhotopyroelectric spectroscopy of polyaniline films-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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