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Enhancement of the direct electron transfer to encapsulated cytochrome c by electrochemical functionalization with a conducting polymer

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Enhancement of the direct electron transfer to encapsulated cytochrome c by electrochemical functionalization with a conducting polymer

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dc.contributor.author López-Bernabeu, Sara es_ES
dc.contributor.author Gamero-Quijano, Alonso es_ES
dc.contributor.author Huerta, Francisco es_ES
dc.contributor.author Morallón, Emilia es_ES
dc.contributor.author Montilla, Francisco es_ES
dc.date.accessioned 2018-01-08T10:08:29Z
dc.date.available 2018-01-08T10:08:29Z
dc.date.issued 2017 es_ES
dc.identifier.issn 1572-6657 es_ES
dc.identifier.uri http://hdl.handle.net/10251/94062
dc.description.abstract [EN] The present work deals with the direct electrochemistry of cytochrome c (cyt c) encapsulated within a methyl-modified silica film prepared by the sol-gel method. It was observed that the voltammetric currents of the redox processes grow in proportion to the protein amount inserted within the gel up to a limiting value. From that point, recorded currents remain independent of the amount of protein loaded. Such a behavior indicates that a portion of cytochrome c molecules is located in non-accessible sites of the silica matrix. The electrochemical insertion of poly(3,4-ethylenedioxythiophene) (PEDOT) through silica pores was carried out to connect those electrically isolated protein molecules and in situ UV¿vis spectroscopy was used to gain information on the redox process of encapsulated cyt c. It was observed that the presence of conducting polymer gives rise to a 3-fold enhancement in cyt c electrochemical reduction rate at the initial stages of the treatment, irrespective of the amount of inserted polymer. The faster electrochemical reduction rate was obtained after the insertion of 6.45 ¿g PEDOT within a silica gel containing 0.5 mg protein. The presence of low conductivity domains in the conducting polymer or the hindrance to the protein free movement could explain that higher amounts of inserted PEDOT cannot improve the electrochemical reduction rate. es_ES
dc.description.sponsorship Financial support from the Spanish Ministerio de Economia y Competitividad and FEDER funds (MAT2013-42007-P and MAT2016-76595-R) and from the Generalitat Valenciana (PROMETEO2013/038) is gratefully acknowledged. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Electroanalytical Chemistry es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Sol-gel es_ES
dc.subject ORMOSIL es_ES
dc.subject Cytochrome c es_ES
dc.subject Direct electron transfer es_ES
dc.subject Conducting polymer es_ES
dc.subject PEDOT-PSS es_ES
dc.subject Hybrid silica matrix es_ES
dc.subject.classification QUIMICA FISICA es_ES
dc.title Enhancement of the direct electron transfer to encapsulated cytochrome c by electrochemical functionalization with a conducting polymer es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jelechem.2016.12.044 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//MAT2016-76595-R/ES/NUEVAS ESTRATEGIAS DE FUNCIONALIZACION ELECTROQUIMICA DE MATERIALES CARBONOSOS NANOESTRUCTURADOS PARA LA REDUCCION DE OXIGENO Y BIOSENSORES/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//MAT2013-42007-P/ES/FUNCIONALIZACION ELECTROQUIMICA DE MATERIALES AVANZADOS PARA APLICACIONES EN ENERGIA Y BIOSENSORES ELECTROQUIMICOS/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//PROMETEO%2F2013%2F038/ES/Desarrollo de nuevos electrodos y procesos químicos sostenibles para la detección de analitos obtenidos por microextracción líquido-líquido/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Textil y Papelera - Departament d'Enginyeria Tèxtil i Paperera es_ES
dc.description.bibliographicCitation López-Bernabeu, S.; Gamero-Quijano, A.; Huerta, F.; Morallón, E.; Montilla, F. (2017). Enhancement of the direct electron transfer to encapsulated cytochrome c by electrochemical functionalization with a conducting polymer. Journal of Electroanalytical Chemistry. 793:34-40. https://doi.org/10.1016/j.jelechem.2016.12.044 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.jelechem.2016.12.044 es_ES
dc.description.upvformatpinicio 34 es_ES
dc.description.upvformatpfin 40 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 793 es_ES
dc.relation.pasarela S\339313 es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES
dc.contributor.funder Generalitat Valenciana es_ES


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