Electrical characterization of in situ polymerized polyaniline thin films.

Detalhes bibliográficos
Autor(a) principal: Travain, Silmar Antonio
Data de Publicação: 2007
Outros Autores: Ferreira, Guilherme Fontes Leal, Giacometti, José Alberto, Bianchi, Rodrigo Fernando
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/4493
https://doi.org/10.1016/j.mseb.2007.07.071
Resumo: The alternating conductivity, σ*(f) = σ (f) + iσ(f), of in situ polymerized polyaniline thin films doped with hydrochloric acid, deposited on top of an interdigitated gold line array previously deposited on glass substrates, were measured in the frequency (f) range between 0.1 Hz to 10 MHz and in the temperature range from 100 to 430 K. The results for σ (f) are typical of a disordered solid material: for frequencies lower than a certain hopping frequency γhop, log[σ (f)] is frequency-independent rising almost linearly for in log f > γhop. A master curve was thus obtained by plotting the real component of the conductivity using normalized scales σ (f)/σdc and f/γhop, which is indicative of a single process operating in the whole frequency range. An expression encompassing the conduction through a disordered structure taken from previous random free energy barrier model for hopping carriers, as well a dielectric function to represent the capacitive behavior of the PAni was employed to fit the experimental results. The dielectric constant and activation energy for hopping carriers were obtained as function of the polymer doping level.
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spelling Electrical characterization of in situ polymerized polyaniline thin films.PolyanilineIn situ polymerizationElectrical propertiesImpedance spectroscopyThe alternating conductivity, σ*(f) = σ (f) + iσ(f), of in situ polymerized polyaniline thin films doped with hydrochloric acid, deposited on top of an interdigitated gold line array previously deposited on glass substrates, were measured in the frequency (f) range between 0.1 Hz to 10 MHz and in the temperature range from 100 to 430 K. The results for σ (f) are typical of a disordered solid material: for frequencies lower than a certain hopping frequency γhop, log[σ (f)] is frequency-independent rising almost linearly for in log f > γhop. A master curve was thus obtained by plotting the real component of the conductivity using normalized scales σ (f)/σdc and f/γhop, which is indicative of a single process operating in the whole frequency range. An expression encompassing the conduction through a disordered structure taken from previous random free energy barrier model for hopping carriers, as well a dielectric function to represent the capacitive behavior of the PAni was employed to fit the experimental results. The dielectric constant and activation energy for hopping carriers were obtained as function of the polymer doping level.2015-02-25T16:16:34Z2015-02-25T16:16:34Z2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfTRAVAIN, S. A. et al. Electrical characterization of in situ polymerized polyaniline thin films. Materials Science and Engineering. B, Solid State Materials for Advanced Technology, v. 143, p. 31-37, 2007. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0921510707003935>. Acesso em: 23 fev. 2015.0921-5107http://www.repositorio.ufop.br/handle/123456789/4493https://doi.org/10.1016/j.mseb.2007.07.071O periódico Materials Science and Engineering. B concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3565381195952.info:eu-repo/semantics/openAccessTravain, Silmar AntonioFerreira, Guilherme Fontes LealGiacometti, José AlbertoBianchi, Rodrigo Fernandoengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOP2019-06-24T12:53:29Zoai:repositorio.ufop.br:123456789/4493Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-06-24T12:53:29Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv Electrical characterization of in situ polymerized polyaniline thin films.
title Electrical characterization of in situ polymerized polyaniline thin films.
spellingShingle Electrical characterization of in situ polymerized polyaniline thin films.
Travain, Silmar Antonio
Polyaniline
In situ polymerization
Electrical properties
Impedance spectroscopy
title_short Electrical characterization of in situ polymerized polyaniline thin films.
title_full Electrical characterization of in situ polymerized polyaniline thin films.
title_fullStr Electrical characterization of in situ polymerized polyaniline thin films.
title_full_unstemmed Electrical characterization of in situ polymerized polyaniline thin films.
title_sort Electrical characterization of in situ polymerized polyaniline thin films.
author Travain, Silmar Antonio
author_facet Travain, Silmar Antonio
Ferreira, Guilherme Fontes Leal
Giacometti, José Alberto
Bianchi, Rodrigo Fernando
author_role author
author2 Ferreira, Guilherme Fontes Leal
Giacometti, José Alberto
Bianchi, Rodrigo Fernando
author2_role author
author
author
dc.contributor.author.fl_str_mv Travain, Silmar Antonio
Ferreira, Guilherme Fontes Leal
Giacometti, José Alberto
Bianchi, Rodrigo Fernando
dc.subject.por.fl_str_mv Polyaniline
In situ polymerization
Electrical properties
Impedance spectroscopy
topic Polyaniline
In situ polymerization
Electrical properties
Impedance spectroscopy
description The alternating conductivity, σ*(f) = σ (f) + iσ(f), of in situ polymerized polyaniline thin films doped with hydrochloric acid, deposited on top of an interdigitated gold line array previously deposited on glass substrates, were measured in the frequency (f) range between 0.1 Hz to 10 MHz and in the temperature range from 100 to 430 K. The results for σ (f) are typical of a disordered solid material: for frequencies lower than a certain hopping frequency γhop, log[σ (f)] is frequency-independent rising almost linearly for in log f > γhop. A master curve was thus obtained by plotting the real component of the conductivity using normalized scales σ (f)/σdc and f/γhop, which is indicative of a single process operating in the whole frequency range. An expression encompassing the conduction through a disordered structure taken from previous random free energy barrier model for hopping carriers, as well a dielectric function to represent the capacitive behavior of the PAni was employed to fit the experimental results. The dielectric constant and activation energy for hopping carriers were obtained as function of the polymer doping level.
publishDate 2007
dc.date.none.fl_str_mv 2007
2015-02-25T16:16:34Z
2015-02-25T16:16:34Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv TRAVAIN, S. A. et al. Electrical characterization of in situ polymerized polyaniline thin films. Materials Science and Engineering. B, Solid State Materials for Advanced Technology, v. 143, p. 31-37, 2007. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0921510707003935>. Acesso em: 23 fev. 2015.
0921-5107
http://www.repositorio.ufop.br/handle/123456789/4493
https://doi.org/10.1016/j.mseb.2007.07.071
identifier_str_mv TRAVAIN, S. A. et al. Electrical characterization of in situ polymerized polyaniline thin films. Materials Science and Engineering. B, Solid State Materials for Advanced Technology, v. 143, p. 31-37, 2007. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0921510707003935>. Acesso em: 23 fev. 2015.
0921-5107
url http://www.repositorio.ufop.br/handle/123456789/4493
https://doi.org/10.1016/j.mseb.2007.07.071
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
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