Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 15, Pages 5525-5533Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00123k
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Funding
- European Commission through ITN-project MATCON [238201]
- Centre National de Recherche Scientifique (CNRS)
- Nord Pas de Calais region
- Institut Universitaire de France (IUF)
- European Union [REGPOT-CT-2011-285949-NOBLESSE]
- University Lille 1
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A sensitive and stable non-enzymatic sensing platform for D-glucose based on a reduced graphene oxide (rGO) matrix modified with Ni(OH)(2) nanostructures was established. The sensing matrix was fabricated in one-step through an electrophoretic deposition approach. It is based on the mixing of negatively charged graphene oxide (GO) with nickel ions resulting in a positively charged composite making cathodic electrophoretic deposition possible. The thickness of the resulting rGO/Ni(OH)(2) matrix deposited on Au could be controlled by varying the time of electrophoretic deposition. The rGO/Ni(OH)(2) matrix was characterized by X-ray photoelectron spectroscopy, Raman spectroscopy and cyclic voltammetry. The rGO/Ni(OH)(2) electrodes exhibited excellent electrocatalytic behaviour towards glucose oxidation in alkaline medium. The response current of the sensor is linear to glucose concentrations from 15 mu M to 30 mu M with a sensitivity of 11.4 +/- 0 mA cm(-2) mM(-1). The interface was much more stable than drop-cast films. These results pave the way for electrophoretic deposition as a competitive alternative over drop-casting for the fabrication of rGO modified interfaces.
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