Electrochemical synthesis of Poly(melamine)-Poly (aspartic acid) copolymer for highly sensitive and selective determination of dopamine

In this study, a carbon paste electrode was modified using Poly (melamine)-Poly (aspartic acid) (PMEL-PASP/CPE) copolymer film, and used for selective determination of dopamine (DA). Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), diffuse reflec...

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Bibliographic Details
Published in:Materials chemistry and physics 2021-07, Vol.267, p.124683, Article 124683
Main Authors: Bonyadi, S., Ghanbari, Kh
Format: Article
Language:English
Subjects:
Aspartic acid
Buffer solutions
Chemical synthesis
Copolymer
Copolymers
Dopamine
Electrochemical impedance spectroscopy
Electrochemical sensor
Field emission microscopy
Fourier transforms
Infrared spectroscopy
Melamine
Oxidation
Poly aspartic acid
Poly melamine
Reproducibility
Spectrum analysis
Voltammetry
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Summary:In this study, a carbon paste electrode was modified using Poly (melamine)-Poly (aspartic acid) (PMEL-PASP/CPE) copolymer film, and used for selective determination of dopamine (DA). Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS), Mott-Schottky test, Raman, and electrochemical impedance spectroscopy (EIS) were used for characterization. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques were used for electrochemical studies. The obtained results denoted high electrocatalytic activity for DA oxidation in phosphate buffer solution (PBS, pH = 7.4). A low detection limit of 0.78 nM with three dynamic ranges from 0.01 to 0.12 μM, 0.32–54.0 μM, and 60.0–1000 μM and sensitivity of 2.712, 0.112, and 0.0501 μA/μM, respectively, were achieved. Acceptable reproducibility (RSD=4.81%), repeatability (RSD=0.39%), and long-term stability were obtained. Furthermore, the efficiency of the sensor in human blood serum was examined and yielded satisfactory results. [Display omitted] •A rapid and single step electropolymerization method was used to form a copolymer film of (PMEL-PASP).•The sensor surface was characterized by using FE-SEM, FT-IR, DRS, Mott-Schottky test, and EIS.•The PMEL-PASP copolymer was exhibited an excellent electrocatalytic activity toward dopamine.•A low detection limit of 0.78 nM with a wide dynamic range from 0.01 to 1000 μM was achieved.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2021.124683