Amperometric sensor for dopamine based on surface-graphenization pencil graphite electrode prepared by in-situ electrochemical delamination

Fan, Xuexue; Xu, Yanan; Sheng, Tiandu; Zhao, Dan; Yuan, Haikuan; Liu, Fengjiao; Liu, Xijian; Zhu, Xueyan; Zhang, Lijuan; Lü, Jie

doi:10.1007/s00604-019-3430-9

Cited by 20 publications

(13 citation statements)

References 35 publications

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“…Containing a sensing element and a pair of electrodes, the electrons pass through the electrodes, and the reaction between the sensing layer and the analyte of interest increases the signal amplitude, which can be used for detecting the elements. In recent years, pencil graphite electrodes (PGE) have been used as electrode material in many sensing studies due to their low cost, high omnipresence, disposability, high mechanical stability, and analytical reproducibility (e.g., [13]). PGE is able to provide reproducible, voltametric peaks and a fast rate of electron transfer for usual Fe(CN) 6 3−/4− and Ru(NH 3 ) 6 3+/2+ redox systems [14].…”

Section: Introductionmentioning

confidence: 99%

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Yavarinasab

Abedini²,

Tahmooressi

et al. 2021

Polymers

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In this study, we analyzed the application of potentiodynamic electrochemical impedance spectroscopy (PDEIS) for a selective in situ recognition of biological trace elements, i.e., Cr (III), Cu (II), and Fe (III). The electrochemical sensor was developed using the electropolymerization of aniline (Ani) on the surface of the homemade pencil graphite electrodes (PGE) using cyclic voltammetry (CV). The film was overoxidized to diminish the background current. A wide range of potential (V = −0.2 V to 1.0 V) was investigated to study the impedimetric and capacitive behaviour of the PAni/modified PGE. The impedance behaviors of the films were recorded at optimum potentials through electrochemical impedance spectroscopy (EIS) and scrutinized by means of an appropriate equivalent circuit at different voltages and at their corresponding oxidative potentials. The values of the equivalent circuit were used to identify features (charge transfer-resistant and double layer capacitance) that can selectivity distinguish different trace elements with the concentration of 10 μM. The PDEIS spectra represented the highest electron transfer for Cu (II) and Cr (III) in a broad potential range between +0.1 and +0.4 V while the potential V = +0.2 V showed the lowest charge transfer resistance for Fe (III). The results of this paper showed the capability of PDEIS as a complementary tool for conventional CV and EIS measurement for metallic ion sensing.

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Section: Introductionmentioning

confidence: 99%

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Yavarinasab

Abedini²,

Tahmooressi

et al. 2021

Polymers

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“…The exact surface feature details for the electrochemical reaction were not explored in this work. In 2019, Fan et al reported a surface graphenized PGE* (2B, 0.5 mm diameter, 5 mm length) for the selective DPV analysis of DA in pH 7 0.2 M PBS [ 52 ]. In a typical procedure, the PGE was coupled with platinum as a two-electrode system and was subjected to a high positive voltage, 3 V for 150 s in a 2 M NaOH solution phase condition.…”

Section: Activated Pencil Graphite Modified Electrodes For Electroche...mentioning

confidence: 99%

Surface-Activated Pencil Graphite Electrode for Dopamine Sensor Applications: A Critical Review

Srinivas

2023

Biosensors

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Pencil graphite electrode (PGE) is an alternative, commercially available, ready-to-use, screen-printed electrode for a wide range of electroanalytical applications. Due to the complex-matrix composition and unpredictable electro-inactive nature of PGE in its native form, a surface pre-treatment/activation procedure is highly preferred for using it as an electroactive working electrode for electroanalytical applications. In this article, we review various surface pre-treatment and modification procedures adopted in the literature with respect to the sensitive and selective detection of dopamine as a model system. Specific generation of the carbon–oxygen functional group, along with partial surface exfoliation of PGE, has been referred to as a key step for the activation. Based on the Scopus® index, the literature collection was searched with the keywords “pencil and dopamine”. The obtained data were segregated into three main headings as: (i) electrochemically pre-treated PGE; (ii) polymer-modified PGEs; and (iii) metal and metal nanocomposite-modified PGE. This critical review covers various surface activation procedures adopted for the activation for PGE suitable for dopamine electroanalytical application.

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“…In fact, acidic and basic solution treatment on PGE has shown a highly active surface for dopamine oxidation in the literature. 33,35 The formed favorable carbon− oxygen functional groups especially C−OH-, >C�O-, and COOH-based sites are found to be key factors for surface activation. The activation procedure beyond the optimal limit may result in serious surface fouling of graphite as graphene oxide, which may affect the electrochemical activity.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In this connection, ultralow-cost and ready-to-use pencil graphite electrodes, which are composed of ∼85% of graphite, 10% of clay, and 5% of wax-binder, have been referred for electroanalytical applications . Besides, the native form of the PGE is electro-inactive and requires specific surface treatments like preanodization, − thermal treatment, flame itching, and metal/metal oxide − and conducting polymer-based surface − modification procedures for the activation. Unlike the HOPG-based systems, molecular insights into the PGE surface and its activation process were not reported until date.…”

Section: Introductionmentioning

confidence: 99%

Edge and Basal Plane Anisotropy of a Preanodized Pencil Graphite Electrode Surface Revealed Using Scanning Electrochemical Microscopy and Electrocatalytic Dopamine Oxidation as a Molecular Probe

Srinivas,

Senthil Kumar,

Senthil Kumar

2023

Langmuir

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Amperometric sensor for dopamine based on surface-graphenization pencil graphite electrode prepared by in-situ electrochemical delamination

Cited by 20 publications

References 35 publications

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Surface-Activated Pencil Graphite Electrode for Dopamine Sensor Applications: A Critical Review

Edge and Basal Plane Anisotropy of a Preanodized Pencil Graphite Electrode Surface Revealed Using Scanning Electrochemical Microscopy and Electrocatalytic Dopamine Oxidation as a Molecular Probe

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