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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  
dc.subject
Gold Nanoparticles  
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Polyethylenimine  
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Scanning Electrochemical Microscopy  
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Self-Assembled Multilayers  
dc.subject.classification
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