Polydopamine@electrochemically reduced graphene oxide-modified electrode for electrochemical detection of free-chlorine

Kumar, Deepak; Kesavan, Srinivasan; Nguyen, Thi Toan; Hwang, Juyoung; Lamiel, Charmaine; Shim, Jae‐Jin

doi:10.1016/j.snb.2016.09.025

Cited by 91 publications

(51 citation statements)

References 58 publications

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“…Kumar et al . have reported a similar method via electrochemical reducing GO and Nafion mixture and then electrodepositing PDA. Herein, Nafion – a cationic permselective polymer with good adhesion similar to PDA – was not used since it could interfere in the effect of PDA.…”

Section: Resultsmentioning

confidence: 99%

“…After that, erGO/GCE was obtained by an electrochemical reduction of GO/GCE performed between −1.4 V and 0 V by cycling for 10 segments in pH 7.0, 0.05 M PBS (step illustration was shown in Scheme , from A to B). Finally, electrochemical polymerization was performed on the erGO/GCE surface by cycling between −0.7 V and +0.7 V for 30 scans or 15 scans at 20 mV/s scan rate in 2 mM dopamine solution with pH 7.4 PBS (step illustration was shown in Scheme , from B to C). PDA/erGO/GCE was kept in air without dustiness.…”

Section: Methodsmentioning

confidence: 99%

“…Various rGO‐based composites further offer the possibility of a wider range of performance . Dropping casting GO and then electrochemical reduction is a relatively convenient, cost‐effective and harmless approach .…”

Section: Introductionmentioning

confidence: 99%

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Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

et al. 2019

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A novel permselective film of electrodeposited polydopamine (PDA) on electrochemical reduced graphene oxide (erGO) surface was prepared. The obtained composite films were characterized by atomic force microscope (AFM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The influences of permselectivity with different electropolymerized cycles and concentration of dopamine on electrochemical responses of biomolecules on electrode were investigated. It was found that the composite film held high cationic permeable to dopamine (DA) and good suppression of ascorbic acid (AA) and uric acid (UA) using CV. The anodic peak currents were proportional to dopamine concentration. The significant permselectivity suggested that the PDA/graphene‐modified electrode has opened a new route to high selective dopamine biosensor.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

et al. 2019

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“…11,12 Several different analytical methods have been reported for the determination of ENR, including capillary electrophoresis, high-performance liquid chromatography, gas chromatography-mass spectrometry, and liquid chromatography-mass spectrometry. [23][24][25] They have been employed for many purposes, including optical switches, biosensors, biomedical tags, and lasers, with several reviews on their use for electrochemical sensing applications having been reported. These include time-consuming sample preparation, use of toxic organic solvents that generate significant amounts of waste, and the need for high-cost instrumentation.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, nanomaterials have attracted considerable attention as electrode coatings, because of their unique optical, electronic, chemical, and mechanical properties. [23][24][25] They have been employed for many purposes, including optical switches, biosensors, biomedical tags, and lasers, with several reviews on their use for electrochemical sensing applications having been reported. [26][27][28][29] The use of nanomaterials as an electrode coating to enlarge surface areas, increase the rate of electron transfer, and reduce response times has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Preparation of cadmium sulfide nanoparticles and their application for improving the properties of the electrochemical sensor for the determination of enrofloxacin in real samples

Liu

Zhang

2019

Chirality

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An advanced electrochemical sensor for the detection of enrofloxacin (ENR) based on the use of a modified electrode containing cadmium sulfide (CdS) nanoparticles (NPs) is reported. The CdS NPs were synthesized and characterized and then coated onto the electrode to fabricate a modified electrode that exhibited a lower limit of detection of 9.5 × 10 −8 mol·L −1 . This detection limit compares with a traditional electrode that exhibited a concentration detection range of 1.0 × 10 −2 to 1.0 × 10 −7 mol·L −1 . This modified electrode demonstrated good selectivity, reproducibility, response time (<40 s), lifetime (up to 12 wk), and pH range (3.3-7.2) for the determination of ENR in real samples (eg, pig urine).

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Characterizing Electron Flow through Catechol‐Graphene Composite Hydrogels

Kim

Argenziano

Zhao

et al. 2022

Adv Materials Inter

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and electron-transfer, and then controlling these mechanisms for user-defined purposes. For energy applications (e.g., capacitors and batteries), the focus is on storing large quantities of electrons and controlling their discharge. [1][2][3] For information processing applications (e.g., electronics), [4,5] materials are desired that can gate and rectify electron-flow. [6,7] Other applications focus on materials that offer state-dependent properties (e.g., optoelectronics) [8] or memory (e.g., memristors). [9] With the growing emphasis on safety and sustainability, and the expanding interest in life-science applications, there is an increasing interest in the development of electronic materials that function in aqueous systems. [10] In aqueous systems, electron-transfer is constrained by the solvent and typically occurs through at least two distinctly different mechanisms each of which favors different types of materials. [11][12][13] One electron-transfer mechanism is a metal-like conductivity. [14,15] Carbon-based nanomaterials have been especially important for conferring such conductivity [14,16] with benefits that include enhanced double layer charge storage for energy applications [17][18][19][20][21] and electrocatalytic properties for sensing applications. [22][23][24] A second electron-transfer mechanism involves reduction-oxidation (redox) reactions. Redox polymers offer such properties and have been used in applications that include energy Electronic materials that allow the controlled flow of electrons in aqueous media are required for emerging applications that require biocompatibility, safety, and/or sustainability. Here, a composite hydrogel film composed of graphene and catechol is electrofabricated, and that this composite offers synergistic properties is reported. Graphene confers metal-like conductivity and enables charge-storage through an electrical double layer mechanism. Catechol confers redox-activity and enables charge-storage through a redox mechanism. Importantly, there are two functional populations of catechols: conducting-catechols (presumably in intimate contact with graphene) allow direct electron-transfer; and non-conducting-catechols (presumably physically separated from graphene) require diffusible mediators to enable electrontransfer. Using a variety of spectroelectrochemical measurements, that the capacity of the composite for charge-storage increases in proportion to the extent by which the catechol-groups can undergo redox-state switching is demonstrated. To illustrate the broad relevance of this work, how the redoxstate switching can be related to both the charge storage of energy materials and the memory of molecular electronic materials is discussed. The authors believe this work is significant because it demonstrates that: conducting and redox-active components enable distinctly different mechanisms for chargestorage and electron-transfer; these components act synergistically; and mediators provide unique opportunities to extend the capabilities of electronic materials.

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Polydopamine@electrochemically reduced graphene oxide-modified electrode for electrochemical detection of free-chlorine

Cited by 91 publications

References 58 publications

Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

Preparation of cadmium sulfide nanoparticles and their application for improving the properties of the electrochemical sensor for the determination of enrofloxacin in real samples

Characterizing Electron Flow through Catechol‐Graphene Composite Hydrogels

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