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A new route for the integration of a graphene/diazonium/PEDOT electrode towards antioxidant biomarker detection

Assaud, Loïc and Massonnet, Nicolas and Evrard, David and Vergnes, Hugues and Salvagnac, Ludovic and Conédéra, Véronique and Noé, Laure and Monthioux, Marc and Gros, Pierre and Temple-Boyer, Pierre and Caussat, Brigitte A new route for the integration of a graphene/diazonium/PEDOT electrode towards antioxidant biomarker detection. (2016) Journal of Electroanalytical Chemistry, vol. 771. pp. 73-79. ISSN 1572-6657

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Official URL: http://dx.doi.org/10.1016/j.jelechem.2016.03.045

Abstract

A new route for the integration of a graphene-based electrode on a silicon substrate was studied for the simultaneous detection and assay of ascorbic (AA) and uric (UA) acids. Graphene was synthesized by catalytic chemical vapour deposition (CVD) from methane as carbon feedstock onto both platinum foils and supported thin platinum films on silicon wafers which were used as catalyst. Graphene was characterized by Raman spectroscopy and electron microscopies. The resulting electrodes were further functionalized by successive electrodeposition of a stabilizing diazoniumlayer and a poly(3,4-ethylenedioxythiophene) (PEDOT) conductive film. AA and UA determination on such modified electrodewas performed either by cyclic voltammetry or by differential pulse voltammetry. In the latter case, the selectivity was about 380 mV and the sensitivity was 2.40 and 2.75 μA cm−2 μM−1 for AA and UA, respectively. The present study shows that monolayer graphene allows a greater sensitivity of AA and UA detection than that observed with modified glassy carbon electrode.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Electroanalytical Chemistry website : http://www.sciencedirect.com/science/journal/15726657
HAL Id:hal-01334138
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université de Toulouse I-Sciences Sociales - UT1 (FRANCE)
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Deposited By: Brigitte CAUSSAT-BONNANS
Deposited On:20 Jun 2016 12:44

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