Electrochemical Characterization of Graphene and MWCNT Screen-Printed Electrodes Modified with AuNPs for Laccase Biosensor DevelopmentReportar como inadecuado


Electrochemical Characterization of Graphene and MWCNT Screen-Printed Electrodes Modified with AuNPs for Laccase Biosensor Development


Electrochemical Characterization of Graphene and MWCNT Screen-Printed Electrodes Modified with AuNPs for Laccase Biosensor Development - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Department of Chemistry and Drug Technologies, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Roma, Italy

2

Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Roma, Italy

3

Department of Chemistry of Materials, University of Santiago of Chile, Av. Libertador Bernardo O’ Higgins 3363 Estacíon Central, Santiago, Chile





*

Authors to whom correspondence should be addressed.



Academic Editor: Ming Su

Abstract The aim of this work is to show how the integration of gold nanoparticles AuNPs into multi-wall-carbon-nanotubes MWCNTs based screen-printed electrodes and into graphene-based screen-printed electrodes GPHs could represent a potential way to further enhance the electrochemical properties of those electrodes based on nanoparticles. Laccase from Trametes versicolor TvL was immobilized over MWCNTs and GPH previously modified with AuNPs of 5 and 10 nm. The characterization of the modified electrode surface has been carried out by cyclic voltammetry. The results showed that the use of AuNPs for modification of both graphene and MWCNTs screen-printed electrode surfaces would increase the electrochemical performances of the electrodes. MWCNTs showed better results than GPH in terms of higher electroactive area formation after modification with AuNPs. The two modified nanostructured electrodes were successively proven to efficiently immobilize the TvL; the electrochemical sensing properties of the GPH- and MWCNT-based AuNPs-TvL biosensors were investigated by choosing 2,2′-Azino-bis3-ethylbenzothiazoline-6-sulfonic-acid diammonium salt ABTS, catechol and caffeic acid as laccase mediators; and the kinetic parameters of the laccase biosensor were carefully evaluated. View Full-Text

Keywords: graphene; multi-walled carbon nanotubes; screen-printed electrodes; gold nanoparticles; laccase; biosensor graphene; multi-walled carbon nanotubes; screen-printed electrodes; gold nanoparticles; laccase; biosensor





Autor: Gabriele Favero 1, Giovanni Fusco 1,2, Franco Mazzei 1, Federico Tasca 3,* and Riccarda Antiochia 1,*

Fuente: http://mdpi.com/



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