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Authordc.contributor.authorLuque, Guillermina L. 
Authordc.contributor.authorFerreyra, Nancy F. 
Authordc.contributor.authorGranero, Adrián 
Authordc.contributor.authorBollo Dragnic, Soledad 
Authordc.contributor.authorRivas, Gustavo A. 
Admission datedc.date.accessioned2018-12-20T15:10:35Z
Available datedc.date.available2018-12-20T15:10:35Z
Publication datedc.date.issued2011
Cita de ítemdc.identifier.citationElectrochimica Acta, Volumen 56, Issue 25, 2018, Pages 9121-9126
Identifierdc.identifier.issn00134686
Identifierdc.identifier.other10.1016/j.electacta.2011.07.036
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/158251
Abstractdc.description.abstractThis work reports the electrochemical response of the complex between dsDNA and PEI formed in solution and at the surface of glassy carbon electrodes (GCE) modified with a dispersion of multi-walled carbon nanotubes in polyethylenimine (CNT-PEI). Scanning Electron Microscopy and Scanning Electrochemical Microscopy demonstrate that the dispersion covers the whole surface of the electrode although there are areas with higher density of CNT and, consequently, with higher electrochemical reactivity. The adsorption of DNA at GCE/CNT-PEI is fast and it is mainly driven by electrostatic forces. A clear oxidation signal is obtained either for dsDNA or a heterooligonucleotide of 21 bases (oligoY) at potentials smaller than those for the oxidation at bare GCE. The comparison of the behavior of DNA before and after thermal treatment demonstrated that the electrochemical response highly depends on the 3D structure of the nucleic acid. © 2011 Elsevier Ltd. All rights reserved.
Lenguagedc.language.isoen
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
Sourcedc.sourceElectrochimica Acta
Keywordsdc.subjectCarbon nanotubes
Keywordsdc.subjectCarbon nanotubes dispersion
Keywordsdc.subjectDNA
Keywordsdc.subjectDNA biosensor
Keywordsdc.subjectPolyethylenimine
Títulodc.titleElectrooxidation of DNA at glassy carbon electrodes modified with multiwall carbon nanotubes dispersed in polyethylenimine
Document typedc.typeArtículo de revista
Catalogueruchile.catalogadorSCOPUS
Indexationuchile.indexArtículo de publicación SCOPUS
uchile.cosechauchile.cosechaSI


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile