Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction

Autores
Ferreyra, Nancy Fabiana; Bollo, Soledad; Rivas, Gustavo Adolfo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present manuscript describes studies of the electron transfer kinetics at gold electrodes modified by electrostatic self-assemblies of polyethylenimine (PEI), DNA and gold nanoparticles (NP) by Scanning Electrochemical Microscopy (SECM). Two redox mediators of similar structure, ferrocenemethanol (FcOH), and ferrocenecarboxylic acid (FcCOOH) were used to evaluate the effect of the electrode modification on the electron transfer process. For both redox probes, the observed electrochemical behavior was dependent of the charge of the external layer of the self-assembled structure. The corresponding apparent heterogeneous rate constant, k0, was determined. The effect of NP adsorption was also evaluated. Independently of the mediator used, an increase of the k0 was observed when NPs were incorporated, and the surfaces presented a conductive behavior similar to the bare gold electrode. SECM images using FcOH as redox mediator were also recorded. Variations in the normalized currents permitted to evaluate differences of the surface electroactivity due to the polymers and/or nanoparticles adsorption. © 2009 Elsevier B.V. All rights reserved.
Fil: Ferreyra, Nancy Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Bollo, Soledad. Universidad de Chile; Chile
Fil: Rivas, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Materia
Dna
Gold Nanoparticles
Polyethylenimine
Scanning Electrochemical Microscopy
Self-Assembled Multilayers
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/67375
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/67375
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reactionFerreyra, Nancy FabianaBollo, SoledadRivas, Gustavo AdolfoDnaGold NanoparticlesPolyethylenimineScanning Electrochemical MicroscopySelf-Assembled Multilayershttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The present manuscript describes studies of the electron transfer kinetics at gold electrodes modified by electrostatic self-assemblies of polyethylenimine (PEI), DNA and gold nanoparticles (NP) by Scanning Electrochemical Microscopy (SECM). Two redox mediators of similar structure, ferrocenemethanol (FcOH), and ferrocenecarboxylic acid (FcCOOH) were used to evaluate the effect of the electrode modification on the electron transfer process. For both redox probes, the observed electrochemical behavior was dependent of the charge of the external layer of the self-assembled structure. The corresponding apparent heterogeneous rate constant, k0, was determined. The effect of NP adsorption was also evaluated. Independently of the mediator used, an increase of the k0 was observed when NPs were incorporated, and the surfaces presented a conductive behavior similar to the bare gold electrode. SECM images using FcOH as redox mediator were also recorded. Variations in the normalized currents permitted to evaluate differences of the surface electroactivity due to the polymers and/or nanoparticles adsorption. © 2009 Elsevier B.V. All rights reserved.Fil: Ferreyra, Nancy Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Bollo, Soledad. Universidad de Chile; ChileFil: Rivas, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaElsevier Science Sa2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/67375Ferreyra, Nancy Fabiana; Bollo, Soledad; Rivas, Gustavo Adolfo; Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 638; 2; 12-2010; 262-2681572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022072809004264info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2009.11.009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:05:03Zoai:ri.conicet.gov.ar:11336/67375instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:05:03.32CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
title Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
spellingShingle Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
Ferreyra, Nancy Fabiana
Dna
Gold Nanoparticles
Polyethylenimine
Scanning Electrochemical Microscopy
Self-Assembled Multilayers
title_short Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
title_full Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
title_fullStr Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
title_full_unstemmed Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
title_sort Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
dc.creator.none.fl_str_mv Ferreyra, Nancy Fabiana
Bollo, Soledad
Rivas, Gustavo Adolfo
author Ferreyra, Nancy Fabiana
author_facet Ferreyra, Nancy Fabiana
Bollo, Soledad
Rivas, Gustavo Adolfo
author_role author
author2 Bollo, Soledad
Rivas, Gustavo Adolfo
author2_role author
author
dc.subject.none.fl_str_mv Dna
Gold Nanoparticles
Polyethylenimine
Scanning Electrochemical Microscopy
Self-Assembled Multilayers
topic Dna
Gold Nanoparticles
Polyethylenimine
Scanning Electrochemical Microscopy
Self-Assembled Multilayers
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The present manuscript describes studies of the electron transfer kinetics at gold electrodes modified by electrostatic self-assemblies of polyethylenimine (PEI), DNA and gold nanoparticles (NP) by Scanning Electrochemical Microscopy (SECM). Two redox mediators of similar structure, ferrocenemethanol (FcOH), and ferrocenecarboxylic acid (FcCOOH) were used to evaluate the effect of the electrode modification on the electron transfer process. For both redox probes, the observed electrochemical behavior was dependent of the charge of the external layer of the self-assembled structure. The corresponding apparent heterogeneous rate constant, k0, was determined. The effect of NP adsorption was also evaluated. Independently of the mediator used, an increase of the k0 was observed when NPs were incorporated, and the surfaces presented a conductive behavior similar to the bare gold electrode. SECM images using FcOH as redox mediator were also recorded. Variations in the normalized currents permitted to evaluate differences of the surface electroactivity due to the polymers and/or nanoparticles adsorption. © 2009 Elsevier B.V. All rights reserved.
Fil: Ferreyra, Nancy Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Bollo, Soledad. Universidad de Chile; Chile
Fil: Rivas, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
description The present manuscript describes studies of the electron transfer kinetics at gold electrodes modified by electrostatic self-assemblies of polyethylenimine (PEI), DNA and gold nanoparticles (NP) by Scanning Electrochemical Microscopy (SECM). Two redox mediators of similar structure, ferrocenemethanol (FcOH), and ferrocenecarboxylic acid (FcCOOH) were used to evaluate the effect of the electrode modification on the electron transfer process. For both redox probes, the observed electrochemical behavior was dependent of the charge of the external layer of the self-assembled structure. The corresponding apparent heterogeneous rate constant, k0, was determined. The effect of NP adsorption was also evaluated. Independently of the mediator used, an increase of the k0 was observed when NPs were incorporated, and the surfaces presented a conductive behavior similar to the bare gold electrode. SECM images using FcOH as redox mediator were also recorded. Variations in the normalized currents permitted to evaluate differences of the surface electroactivity due to the polymers and/or nanoparticles adsorption. © 2009 Elsevier B.V. All rights reserved.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/67375
Ferreyra, Nancy Fabiana; Bollo, Soledad; Rivas, Gustavo Adolfo; Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 638; 2; 12-2010; 262-268
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/67375
identifier_str_mv Ferreyra, Nancy Fabiana; Bollo, Soledad; Rivas, Gustavo Adolfo; Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 638; 2; 12-2010; 262-268
1572-6657
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022072809004264
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2009.11.009
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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