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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, L. Jeeva and Neogi, Sudarsan and Jaganathan, Saravana Kumar and Nageswaran, Gomathi (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 and Bioelectronics, 105 . pp. 236-242. ISSN 0956-5663

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Official URL: http://dx.doi.org/10.1016/j.bios.2018.01.040

Abstract

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.

Item Type:Article
Uncontrolled Keywords:Ascorbic acid, Dopamine
Subjects:Q Science > Q Science (General)
Divisions:Biosciences and Medical Engineering
ID Code:86657
Deposited By: Widya Wahid
Deposited On:30 Sep 2020 09:04
Last Modified:30 Sep 2020 09:04

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