Fabrication of disposable electrochemical dopamine sensor using photoluminescent graphene oxide

Graphene oxide (GO) with photoluminescent property was prepared by modifiedHummer's method. Spectroscopic and morphological studies were carried out using photoluminescence spectroscopy, UV-Vis absorption spectroscopy, FT-IR, XRD and FE-SEM. Electrochemical dopamine sensor was fabricated by dro...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-11, Vol.577 (1), p.12105
Main Authors: Gunasekaran, Sowmya, Raveendran, Jeethu, Suneesh, P V, Satheesh Babu, T. G
Format: Article
Language:English
Subjects:
Ascorbic acid
biosensor
Dopamine
Electrical measurement
Graphene
Graphene oxide
Infrared spectroscopy
Photoluminescence
Sensors
Spectrum analysis
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Summary:Graphene oxide (GO) with photoluminescent property was prepared by modifiedHummer's method. Spectroscopic and morphological studies were carried out using photoluminescence spectroscopy, UV-Vis absorption spectroscopy, FT-IR, XRD and FE-SEM. Electrochemical dopamine sensor was fabricated by drop casting GO onto screen printed carbon electrodes (SPCE). Cyclic voltammogram, differential pulse voltammogram and amperometry were performed to test the fabricated sensor. The sensor exhibits wide detection range of 12.5 μM to 1 mM dopamine concentrations in 0.1 M PBS of pH 7.4. The major interferents such as ascorbic acid shown negligible current response compared to dopamine.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/577/1/012105