Kaleesh Kumar, M. and Vishnu Prataap, R.K. and Mohan, S. and Jha, S.K. (2016) Preparation of electro-reduced graphene oxide supported walnut shape nickel nanostructures, and their application to selective detection of dopamine. Microchimica Acta, 183. pp. 1759-1768. ISSN 0026-3672

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Abstract

A selective and sensitive method is reported for the detection of dopamine (DA) by using electro-reduced graphene oxide (er-GO) supported walnut shape nickel nanocomposite (er-GO-Ni) modified glassy carbon electrode. The surface morphological characterizations reveal that the Ni nanoparticles were homogeneously distributed on the er-GO nanosheets. Subsequently the electrochemical study shows an excellent selectivity, reproducibility, low detection limit (10 ± 0.03 nM), high sensitivity (23.3 nA·μM−1 ), and reasonably wide linear range (0.05–50 μM) for the detection of DA at +0.1 V vs SCE. The selectivity for DA over ascorbic acid and uric acid is attributed to the charge-based discrimination of the modified electrode. An excellent correspondence of calculated and reported rate constant for the DA oxidation is also obtained by hydrodynamic experiments using a rotating disk electrode.

Item Type:	Article
Uncontrolled Keywords:	Dopamine;Ascorbic acid;Nickel nanoparticles; Electrochemically reduced graphene oxide;Nafion;Rotating disk electrode;Differential pulse voltammetry
Subjects:	Industrial Metal Finishing
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	11 Aug 2017 07:26
Last Modified:	11 Aug 2017 07:26
URI:	http://cecri.csircentral.net/id/eprint/3186

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