Sensitivity control of dopamine detection by conducting poly(thionine)

Md Mahbubur Rahman; Jae Joon Lee

doi:10.1016/j.elecom.2021.107005

Sensitivity control of dopamine detection by conducting poly(thionine)

Md Mahbubur Rahman, Jae Joon Lee

Department of Energy and Materials Engineering

Konkuk University

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

We investigated conducting poly(thionine) (PTH) films prepared by single-step and double-step electrochemical methods (PTH-S and PTH-D, respectively) on the surface of a glassy carbon electrode (GCE) for the detection of dopamine (DA) with varying sensitivity. Electrochemical and spectroscopic analysis revealed that both PTH films have identical chemical structures, but the sensitivity of DA detection was significantly dependent on the polymerization conditions. A simple variation of the electropolymerization conditions dramatically changed the catalytic activity of the PTH films towards the oxidation of DA in the presence of ascorbic acid (AA) and uric acid (UA) as well as the PTH formation mechanism. PTH-D was found to have a higher surface charge than PTH-S, and also showed a sensitivity enhancement for DA detection of up to one order of magnitude compared to PTH-S.

Original language	English
Article number	107005
Journal	Electrochemistry Communications
Volume	125
DOIs	https://doi.org/10.1016/j.elecom.2021.107005
State	Published - Apr 2021

Keywords

Conducting polymer
Dopamine
Electrochemical detection
Electropolymerization
Poly(thionine)
Sensitivity control

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10.1016/j.elecom.2021.107005

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title = "Sensitivity control of dopamine detection by conducting poly(thionine)",

abstract = "We investigated conducting poly(thionine) (PTH) films prepared by single-step and double-step electrochemical methods (PTH-S and PTH-D, respectively) on the surface of a glassy carbon electrode (GCE) for the detection of dopamine (DA) with varying sensitivity. Electrochemical and spectroscopic analysis revealed that both PTH films have identical chemical structures, but the sensitivity of DA detection was significantly dependent on the polymerization conditions. A simple variation of the electropolymerization conditions dramatically changed the catalytic activity of the PTH films towards the oxidation of DA in the presence of ascorbic acid (AA) and uric acid (UA) as well as the PTH formation mechanism. PTH-D was found to have a higher surface charge than PTH-S, and also showed a sensitivity enhancement for DA detection of up to one order of magnitude compared to PTH-S.",

keywords = "Conducting polymer, Dopamine, Electrochemical detection, Electropolymerization, Poly(thionine), Sensitivity control",

author = "{Mahbubur Rahman}, Md and Lee, {Jae Joon}",

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doi = "10.1016/j.elecom.2021.107005",

language = "English",

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journal = "Electrochemistry Communications",

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T1 - Sensitivity control of dopamine detection by conducting poly(thionine)

AU - Mahbubur Rahman, Md

AU - Lee, Jae Joon

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AB - We investigated conducting poly(thionine) (PTH) films prepared by single-step and double-step electrochemical methods (PTH-S and PTH-D, respectively) on the surface of a glassy carbon electrode (GCE) for the detection of dopamine (DA) with varying sensitivity. Electrochemical and spectroscopic analysis revealed that both PTH films have identical chemical structures, but the sensitivity of DA detection was significantly dependent on the polymerization conditions. A simple variation of the electropolymerization conditions dramatically changed the catalytic activity of the PTH films towards the oxidation of DA in the presence of ascorbic acid (AA) and uric acid (UA) as well as the PTH formation mechanism. PTH-D was found to have a higher surface charge than PTH-S, and also showed a sensitivity enhancement for DA detection of up to one order of magnitude compared to PTH-S.

KW - Conducting polymer

KW - Dopamine

KW - Electrochemical detection

KW - Electropolymerization

KW - Poly(thionine)

KW - Sensitivity control

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DO - 10.1016/j.elecom.2021.107005

M3 - Article

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SN - 1388-2481

VL - 125

JO - Electrochemistry Communications

JF - Electrochemistry Communications

M1 - 107005

ER -

Sensitivity control of dopamine detection by conducting poly(thionine)

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Keywords

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