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dc.contributor.authorRodríguez Méndez, María Luz 
dc.contributor.authorGarcía Hernández, Celia 
dc.contributor.authorGarcía Cabezon, Cristina
dc.contributor.authorMartín Pedrosa, Fernando 
dc.contributor.authorDe Saja, J.A.
dc.date.accessioned2018-07-10T10:21:43Z
dc.date.issued2016
dc.identifier.citationBelstein J. Nanotechnology vol. 7 p. 1948-1959es
dc.identifier.urihttp://uvadoc.uva.es/handle/10324/30583
dc.description.abstractThe sensing properties of electrodes chemically modified with PEDOT/PSS towards catechol and hydroquinone sensing have been successfully improved by combining layers of PEDOT/PSS with layers of a secondary electrocatalytic material such as gold nanoparticles (PEDOT/PSS/AuNPs), copper phthalocyanine (PEDOT/PSS/CuPc) or lutetium bisphthalocyanine (PEDOT/PSS/LuPc2). Layered composites exhibit synergistic effects that strongly enhance the electrocatalytic activity as indicated by the increase in intensity and the shift of the redox peaks to lower potentials. A remarkable improvement has been achieved using PEDOT/PSS/LuPc2, which exhibits excellent electrocatalytic activity towards the oxidation of catechol. The kinetic studies demonstrated diffusion-controlled processes at the electrode surfaces. The kinetic parameters such as Tafel slopes and charge transfer coefficient (α) confirm the improved electrocatalytic activity of the layered electron mediators. The peak currents increased linearly with concentration of catechol and hydroquinone over the range of 1.5 × 10−4 to 4.0 × 10−6 mol·L−1 with a limit of detection on the scale of μmol·L−1. The layered composite hybrid systems were also found to be excellent electron mediators in biosensors containing tyrosinase and laccase, and they combine the recognition and biocatalytic properties of biomolecules with the unique catalytic features of composite materials. The observed increase in the intensity of the responses allowed detection limits of 1 × 10−7 mol·L−1 to be attained.es
dc.format.mimetypeapplication/pdfes
dc.language.isoenges
dc.rights.accessRightsinfo:eu-repo/semantics/embargoedAccesses
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleLayered composites of PEDOT:PSS/nanoparticles and PEDOT:PSS/phthalocyanines as electron mediators in sensors and biosensorses
dc.typeinfo:eu-repo/semantics/articlees
dc.identifier.doi10.1177/0021955X16681454es
dc.peerreviewedSIes
dc.description.embargo2020-07-10es
dc.description.lift2020-07-10
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International


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