Experimentation and numerical modeling of cyclic voltammetry for electrochemical micro-sized sensors under the influence of electrolyte flow

Adesokan, Bolaji James; Quan, Xueling; Evgrafov, Anton; Heiskanen, Arto; Boisen, Anja; Sørensen, Mads Peter

doi:10.1016/j.jelechem.2015.12.029

Cited by 17 publications

(11 citation statements)

References 44 publications

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“…2b), the current peaks are observed at potential scan rates ≥50 mV/s. Those results are in line with previous studies which show that, by varying the scan rate and the flow, the change in the mass transport conditions at the electrode surface was responsible for the change of electrochemical signature [16,17].…”

Section: Resultssupporting

confidence: 93%

Characterization of the mass transfer fluxes in a capacitive desalination cell by using FeIII(CN)63−/FeII(CN)64− redox couple as an electrochemical probe

Sene

Daffos

Taberna

et al. 2019

Journal of Electroanalytical Chemistry

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This paper focuses on the characterization of an electrochemical flow cell designed for capacitive desalination, by using the Fe III (CN) 63− /Fe II (CN) 6 4− redox couple as an electrochemical probe. A relationship between the potential scan rate and the electrolyte flow rate has been first established by defining a dimensionless number, θ. Depending on the θ values, two regime domains -dependent and non-dependent from the flow rate -have been defined. The dimensionless number θ was found to be of great help for defining the suitable flow rate for several carbon based electrodes exhibiting different surface area, using Fe III (CN) 63− /Fe II (CN) 6 4− redox couple as an electrochemical probe. The proposed electrochemical analysis is a way to optimize the performance of an electrochemical flow cell for capacitive desalination applications.

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Section: Resultssupporting

confidence: 93%

Characterization of the mass transfer fluxes in a capacitive desalination cell by using FeIII(CN)63−/FeII(CN)64− redox couple as an electrochemical probe

Sene

Daffos

Taberna

et al. 2019

Journal of Electroanalytical Chemistry

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“…Later on, the model principles were applied for modeling the reversible electrochemical reaction with one electron followed by the mediated reaction of immobilized enzyme with two electrons [18]. The simulation of cyclic voltammetry was also applied for studying the influence of ohmic drop [19,20], electrode area, electrochemical reaction constants and transferring coefficients [21], as well as the effect of flow rates [22][23][24] on the current response and wave shape. Analyzing the curve shape, peak shifts and amplitudes between the first cycle and successive scans in the obtained cyclic voltammograms is an important key in providing useful information on the mechanism of the electrochemical reaction as well as the adsorption mechanism and the diffusivities of the electrochemical species [25].…”

Section: Introductionmentioning

confidence: 99%

Mechanistic modeling of cyclic voltammetry: A helpful tool for understanding biosensor principles and supporting design optimization

Semenova

Zubov

Silina

et al. 2018

Sensors and Actuators B: Chemical

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Highlights  The physicochemical parameters required for mathematical modeling were either found in literature or estimated on the basis of experimental data. Thus, the applicability of the developed model is not limited by the dataset or biosensor design.  The developed cyclic voltammetry simulator was applied for interpreting the experimental results at various mediator concentrations, membrane thickness/compositions and operating conditions of the proposed multi-layer biosensor system.  An accurate electrochemical, morphological and microscopic characterization of the biosensor system coupled with the model predictions allowed to identify the parameters crucial for the stable biosensor response.  Based on the model predictions, a more favourable design of the biosensor system was developed, which subsequently reduced the reagent usage and waste generation.

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“…Deneysel yöntemlere ulaşımın zor olduğu durumlarda sayısal modellemeler sistem tasarımı ve karakterizasyonu için kullanılabilmektedir. Buradan hareketle çevrimsel voltammetriyi de karakterize edebilen matematiksel modeller bulunmaktadır [10]. Bu modellerdeki temel mantık çözünenin akış hızı ile tarama hızının ilişkilendirilmesi üzerine kurulmuştur.…”

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Çevrimsel Voltametri Tabanlı Mikroakışkan Sistem Tasarımı ve Analizi

Canpolat

TOGAY

2023

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi

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Bu çalışmada bir mikroakışkan sisteme entegre edilmiş biyosensörün üzerinde oluşan redoks tepkimeler çevrimsel voltammetri yöntemiyle izlenerek akışkan içerisindeki glukozun tayini yapılmıştır. Mikrokanala entegre biyosensörün tasarımı ve sonlu elemanlar analizi için Comsol Multiphysics v3.5a kullanılmıştır. Bu bağlamda, yüksekliği 300 µm ve uzunluğu 1500 µm olan bir mikrokanal yüzeyine elektrot yerleştirilmiştir. Matematiksel modelleme öncelikli olarak mikrokanal boyunca sıvı akışı olmadan gerçekleştirilmiştir. Analizlere mikrokanal girişine laminer akış koşulları altında bir sıvı girişi tanımlanarak devam edilerek çevrimsel voltammetri tabanlı bir mikroakışkan sistem tasarımı yapılmıştır. Biyosensörün etkinliği 0.25mM, 0.5mM, 1mM, 2mM, 4mM ve 8mM gibi farklı glukoz değerlerinde test edilmiştir. Mikrokanalın girişine tanımlanan laminar akışın debisinin biyosensörden alınan yanıta etkisinin belirlenmesi için 25 µl/dk, 50 µl/dk, 100 µl/dk ve 200 µl/dk gibi farklı debi değerlerinde çözümlemeler yapılmıştır. Elektrot uzunluğunun çevrimsel voltammetriden alınan cevaba etkisinin incelebilmesi için elektrot uzunluğu 100µm, 200µm ve 300µm olarak değiştirilmiştir. Bu çalışmada laminer akış varlığında çevrimsel voltammetriden elde edilen maksimum akımın yükseldiği gözlemlenmiştir. Simülasyonlar, sıvı akış debisinin arttırılmasının biyosensörün etkinliğini arttırdığını göstermiştir. Sonuç olarak, bu çalışma ile çevrimsel voltammetri tabanlı bir mikroakışkan sistem ile glukoz tayininin yapılabilirliği ortaya konulmuştur.

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Experimentation and numerical modeling of cyclic voltammetry for electrochemical micro-sized sensors under the influence of electrolyte flow

Cited by 17 publications

References 44 publications

Characterization of the mass transfer fluxes in a capacitive desalination cell by using FeIII(CN)63−/FeII(CN)64− redox couple as an electrochemical probe

Characterization of the mass transfer fluxes in a capacitive desalination cell by using FeIII(CN)63−/FeII(CN)64− redox couple as an electrochemical probe

Mechanistic modeling of cyclic voltammetry: A helpful tool for understanding biosensor principles and supporting design optimization

Çevrimsel Voltametri Tabanlı Mikroakışkan Sistem Tasarımı ve Analizi

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