Quantum chemical and electrochemical studies of lysine modified carbon paste electrode surfaces for sensing dopamine

In the current work, we have improved the sensitivity of a carbon paste electrode (CPE) from lysine for the sensitive detection of dopamine (DA). We have used density functional theory based quantum chemical calculations to characterize the lysine modified CPE (LMCPE) surface at the atomic scale. Qu...

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Bibliographic Details
Published in:New journal of chemistry 2018, Vol.42 (6), p.451-456
Main Authors: Kudur Jayaprakash, Gururaj, Kumara Swamy, B. E, Nicole González Ramírez, Henry, Tumbre Ekanthappa, Musturappa, Flores-Moreno, Roberto
Format: Article
Language:English
Subjects:
Density functional theory
Dopamine
Electrodes
Electron transfer
Lysine
Quantum chemistry
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Summary:In the current work, we have improved the sensitivity of a carbon paste electrode (CPE) from lysine for the sensitive detection of dopamine (DA). We have used density functional theory based quantum chemical calculations to characterize the lysine modified CPE (LMCPE) surface at the atomic scale. Quantum chemical modeling with analytical Fukui results suggests that lysine acts as an electrocatalyst on the LMCPE surface by increasing its active electron transfer (ET) sites. The obtained voltammetric results are in good agreement with the theoretical observations and electrochemical results showed that the LMCPE surface is stable and efficient in sensing DA in commercial samples. We have improved the sensitivity of a carbon paste electrode from lysine for the sensitive detection of dopamine.
ISSN:1144-0546
1369-9261
DOI:10.1039/c7nj04998f