Study of optical absorption differences of doped polyaniline films by photothermal spectroscopies

dc.creatorAlbuquerque, J. E. de
dc.creatorMelo, W. L. B.
dc.creatorFaria, R. M.
dc.date2018-10-10T13:06:42Z
dc.date2018-10-10T13:06:42Z
dc.date2007-07-29
dc.date.accessioned2023-09-27T21:00:55Z
dc.date.available2023-09-27T21:00:55Z
dc.identifier1432-0630
dc.identifierhttps://doi.org/10.1007/s00339-007-4161-z
dc.identifierhttp://www.locus.ufv.br/handle/123456789/22219
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8952850
dc.descriptionIn this work, we studied the optical absorption spectral differences between doped and slightly doped polyaniline films and a derivative by photopyroelectric and photoacoustic spectroscopies. There exist great spectral differences between doped and slightly doped samples as shown by conventional optical absorption spectroscopy, but not greatly evidenced by photopyroelectric spectroscopy. The latter was applied to obtain thermal parameters such as thermal diffusivity and thermal conductivity, and as a result it showed that these thermal properties of polyaniline films are very similar for doped and slightly doped samples. Also it showed that for thicker films (about 20 μm), there are no significant optical absorption differences between them. However, for thin films both techniques showed greater optical absorption differences for doped and slightly doped samples, mainly detected by photoacoustic spectroscopy. These behaviors are in accordance with published results which is the granular metal model for polyaniline. This model explains the polyaniline polymeric matrix as formed by conductive islands in the insulating bulk material.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherApplied Physics A
dc.relationVolume 89, Issue 1, p. 165–172, October 2007
dc.rightsSpringer-Verlag
dc.subjectPANI
dc.subjectPhotoacoustic spectroscopy
dc.subjectEmeraldine base
dc.subjectPOMA
dc.subjectChopper frequency
dc.titleStudy of optical absorption differences of doped polyaniline films by photothermal spectroscopies
dc.typeArtigo


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