Investigations of ultrathin polypyrrole films: Formation and effects of doping/dedoping processes on its optical properties by electrochemical surface plasmon resonance (ESPR)

dc.creatorDamos, FS
dc.creatorLuz, RCS
dc.creatorKubota, LT
dc.date2006
dc.date38353
dc.date2014-11-17T02:43:47Z
dc.date2015-11-26T16:36:06Z
dc.date2014-11-17T02:43:47Z
dc.date2015-11-26T16:36:06Z
dc.date.accessioned2018-03-28T23:18:44Z
dc.date.available2018-03-28T23:18:44Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 51, n. 7, n. 1304, n. 1312, 2006.
dc.identifier0013-4686
dc.identifierWOS:000234818100020
dc.identifier10.1016/j.electacta.2005.06.019
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60654
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/60654
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60654
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1271704
dc.descriptionIn the present work an investigation of the effects of the electropolymerization mode on the optical properties associated to the doping/dedoping processes of nanometric films of polypyrrole (PPy) is reported, monitoring in situ and in real time using simultaneously surface plasmon resonance and electrochemical techniques (ESPR). The electropolymerization of pyrrole was performed by potentiostatic, potentiodynamic and galvanostatic methods and the use of the ESPR technique showed that the electropolymerization mode is essential to the stability of polymer and the reversibility of its optical properties during the doping and dedoping processes. Thus, the optical properties of oxidized and reduced film were obtained by nonlinear least square fitting using Fresnel equations for a four-layer system. Then, the values of the real and imaginary parts of the complex dielectric constant for PPy fims were correlated with the polymer doping level. Finally, quartz crystal microbalance measurements were also applied to obtain correlation between doping/dedoping processes and the changes in the real and imaginary parts of the dielectric constant of the polypyrrole film, showing that the doping and dedoping processes in the polypyrrole film can act directly on its optical properties while the ESPR technique can give the same information indirectly. (C) 2005 Elsevier Ltd. All rights reserved.
dc.description51
dc.description7
dc.description1304
dc.description1312
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectpyrrole
dc.subjectelectrochemical surface plasmon resonance
dc.subjectelectrochemical quartz crystal microbalance
dc.subjectdoping
dc.subjectdedoping
dc.subjectQuartz-crystal Microbalance
dc.subjectPolyaniline Thin-films
dc.subjectIn-situ Investigations
dc.subjectRedox Processes
dc.subjectCyclic Voltammetry
dc.subjectAqueous-solutions
dc.subjectPolymer-films
dc.subjectSpectroscopy
dc.subjectElectrode
dc.subjectElectropolymerization
dc.titleInvestigations of ultrathin polypyrrole films: Formation and effects of doping/dedoping processes on its optical properties by electrochemical surface plasmon resonance (ESPR)
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución