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Simultaneous determination of ascorbic acid, dopamine and uric acid by a novel electrochemical sensor based on N2/Ar RF plasma assisted graphene nanosheets/graphene nanoribbons

Jothi, Lavanya; Neogi, Sudarsan; Jaganathan, Saravana kumar; Nageswaran, Gomathi

Authors

Lavanya Jothi

Sudarsan Neogi

Saravana kumar Jaganathan

Gomathi Nageswaran



Abstract

© 2018 Elsevier B.V. A novel nitrogen/argon (N2/Ar) radio frequency (RF) plasma functionalized graphene nanosheet/graphene nanoribbon (GS/GNR) hybrid material (N2/Ar/GS/GNR) was developed for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). Various nitrogen mites introduced into GS/GNR hybrid structure was evidenced by a detailed microscopic, spectroscopic and surface area analysis. Owing to the unique structure and properties originating from the enhanced surface area, nitrogen functional groups and defects introduced on both the basal and edges, N2/Ar/GS/GNR/GCE showed high electrocatalytic activity for the electrochemical oxidations of AA, DA, and UA with the respective lowest detection limits of 5.3, 2.5 and 5.7 nM and peak-to-peak separation potential (ΔEP) (vs Ag/AgCl) in DPV of 220, 152 and 372 mV for AA/DA, DA/UA and AA/UA respectively. Moreover, the selectivity, stability, repeatability and excellent performance in real time application of the fabricated N2/Ar/GS/GNR/GCE electrode suggests that it can be considered as a potential electrode material for simultaneous detection of AA, DA, and UA.

Citation

Jothi, L., Neogi, S., Jaganathan, S. K., & Nageswaran, G. (2018). Simultaneous determination of ascorbic acid, dopamine and uric acid by a novel electrochemical sensor based on N2/Ar RF plasma assisted graphene nanosheets/graphene nanoribbons. Biosensors & bioelectronics, 105, 236-242. https://doi.org/10.1016/j.bios.2018.01.040

Journal Article Type Article
Acceptance Date Jan 18, 2018
Online Publication Date Feb 4, 2018
Publication Date May 15, 2018
Deposit Date Mar 5, 2021
Journal Biosensors and Bioelectronics
Print ISSN 0956-5663
Electronic ISSN 1873-4235
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 105
Pages 236-242
DOI https://doi.org/10.1016/j.bios.2018.01.040
Keywords N2/Ar RF plasma; Graphenenanosheets/graphene nanoribbons; Ascorbic acid; Dopamine; Uric acid; Differential pulse voltammetry
Public URL https://hull-repository.worktribe.com/output/3603006