title: Highly sensitive and selective electrochemical dopamine sensing properties of multilayer graphene nanobelts.
abstract: In the present study, we report the electrochemical sensing property of multi-layer graphene nanobelts (GNBs) towards dopamine (DA). GNBs are synthesized from natural graphite and characterized by using techniques like field-emission scanning electron microscopy, atomic force microscopy and Raman spectroscopy. An electrochemical sensor based on GNBs is developed for the detection of DA. From the cyclic voltammetry and amperometry studies, it is found that GNBs possess excellent electrocatalytic activity towards DA molecules. The developed DA sensor showed a sensitivity value of 0.95 μA μM(-1) cm(-2) with a linear range of 2 μM to 0.2 mM. The interference data exhibited that GNB is highly selective to DA even in the presence of common interfering species like ascorbic acid, uric acid, glucose and lactic acid.
authors.affiliation: School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar 751013, Odisha, India.
authors.forename: Padmanathan Karthick
authors.initials: PK
authors.lastname: Kannan
authors.forename: Stanislav A
authors.initials: SA
authors.lastname: Moshkalev
authors.forename: Chandra Sekhar
authors.initials: CS
authors.lastname: Rout
mesh_terms: D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction
chemical_list: D006108:Graphite; D004298:Dopamine