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dc.contributor.author
Ferreyra, Nancy Fabiana
dc.contributor.author
Bollo, Soledad
dc.contributor.author
Rivas, Gustavo Adolfo
dc.date.available
2019-01-04T12:41:17Z
dc.date.issued
2010-12
dc.identifier.citation
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
dc.identifier.issn
1572-6657
dc.identifier.uri
http://hdl.handle.net/11336/67375
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Dna
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Gold Nanoparticles
dc.subject
Polyethylenimine
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Scanning Electrochemical Microscopy
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Self-Assembled Multilayers
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Self-assembled multilayers of polyethylenimine, DNA and gold nanoparticles. A study of electron transfer reaction
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-02T19:11:13Z
dc.journal.volume
638
dc.journal.number
2
dc.journal.pagination
262-268
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
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
dc.description.fil
Fil: Bollo, Soledad. Universidad de Chile; Chile
dc.description.fil
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
dc.journal.title
Journal of Electroanalytical Chemistry
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022072809004264
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jelechem.2009.11.009
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