caa a22 4500 463212576 CHVBK 20180405153146.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s00339-007-4161-z doi (NATIONALLICENCE)springer-10.1007/s00339-007-4161-z Study of optical absorption differences of doped polyaniline films by photothermal spectroscopies [Elektronische Daten] [J.E. de Albuquerque, W.L.B. Melo, R.M. Faria] In 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 20μm), 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. Springer-Verlag, 2007 de Albuquerque J.E. Departamento de Física, Universidade Federal de Viçosa, 36571-000, Viçosa, MG, Brazil aut Melo W.L.B. CNPDIA/EMBRAPA, 13560-970, São Carlos, SP, Brazil aut Faria R.M. Instituto de Física de São Carlos/USP, 13560-970, São Carlos, SP, Brazil aut Applied Physics A Springer-Verlag 89/1(2007-10-01), 165-172 0947-8396 89:1<165 2007 89 339 https://doi.org/10.1007/s00339-007-4161-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4161-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Albuquerque J.E. Departamento de Física, Universidade Federal de Viçosa, 36571-000, Viçosa, MG, Brazil aut NATIONALLICENCE 700 1- Melo W.L.B. CNPDIA/EMBRAPA, 13560-970, São Carlos, SP, Brazil aut NATIONALLICENCE 700 1- Faria R.M. Instituto de Física de São Carlos/USP, 13560-970, São Carlos, SP, Brazil aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/1(2007-10-01), 165-172 0947-8396 89:1<165 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer