Nucleation and growth mechanisms during electropolymerization of substituted 3-alkylthiophenes

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dc.contributor.authorSoto, J. P.
dc.contributor.authorDiaz, F. R.
dc.contributor.authordel Valle, M. A.
dc.contributor.authorVelez, J. H.
dc.contributor.authorEast, G. A.
dc.date.accessioned2024-01-10T12:07:02Z
dc.date.available2024-01-10T12:07:02Z
dc.date.issued2008
dc.description.abstractIn the present work the electrochemical study of compounds based on 3-((omega-bromoalkyloxy) methyl) thiophene, varying the length of the alkyl chain between 6 and 12 carbon atoms, is reported. Electropolymerization of the monomers was achieved by potentiodynamic (cyclic voltammetry, CV) and potentiostatic (constant potential) techniques. Voltammograms obtained by CV show that all monomers can be electrochemically oxidized at potentials about 1800 mV to synthesize the respective polymer. Besides, the potential shifts to more anodic potentials on successive scans, increasing thus the resistivity of the material. Nucleation and growth mechanism (NGM) of electropolymerization was investigated by a potentiostatic technique (j-t). Deconvolution of the current-time transient data fitted with a theoretical model suggests that at short times the instantaneous nucleation with two-dimensional growth (IN2D) contribution prevails, followed by an instantaneous nucleation with three-dimensional growth controlled by the charge transfer (IN3Dct) contribution and, finally at longer times, the instantaneous nucleation with three-dimensional growth controlled by diffusion (IN3Ddif) contribution becomes important. The predominance of each contribution to the NGM depends on the monomer being electropolymerized, and the electrolysis time. The morphology predicted from these NGMs fully correlates with that determined by SEM. (C) 2007 Elsevier B.V. All rights reserved.
dc.fechaingreso.objetodigital20-03-2024
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.apsusc.2007.11.052
dc.identifier.eissn1873-5584
dc.identifier.issn0169-4332
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2007.11.052
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76237
dc.identifier.wosidWOS:000254243800038
dc.information.autorucQuímica;Del Valle M;S/I;54928
dc.information.autorucQuímica;Díaz F;S/I;98205
dc.information.autorucQuímica;Vélez J;S/I;129862
dc.issue.numero11
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final3496
dc.pagina.inicio3489
dc.publisherELSEVIER
dc.revistaAPPLIED SURFACE SCIENCE
dc.rightsacceso restringido
dc.subjectpoly 3-alkylthiophenes
dc.subjectelectropolymerization
dc.subjectnucleation and growth mechanisms of electropolymerization
dc.subjectconducting polymer
dc.subjectthiophene
dc.subjectMONOMER CONCENTRATION
dc.subjectELECTROCHEMICAL SYNTHESIS
dc.subjectTHIN-FILMS
dc.subjectELECTROLYTE
dc.subjectMORPHOLOGY
dc.subjectSEM
dc.titleNucleation and growth mechanisms during electropolymerization of substituted 3-alkylthiophenes
dc.typeartículo
dc.volumen254
sipa.codpersvinculados54928
sipa.codpersvinculados98205
sipa.codpersvinculados129862
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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