The cyclic and linear sweep voltammetry of regular arrays of microdisc electrodes: Fitting of experimental data

Davies, Trevor J.; Ward-Jones, Sarah; Banks, Craig E.; Campo, F. Javier del; Mas, Roser; Muñoz, Francesc Xavier; Compton, Richard G.

doi:10.1016/j.jelechem.2005.07.021

Cited by 177 publications

(186 citation statements)

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“…Our simulation results for the microelectrode array ( Figure 2A) agreed with previous results presented in 8 . The transition across the different regimes can be seen in the figure, and further confirmation may be obtained using Einstein's relation !…”

Section: Nanoelectrode Arrays and The Diffusion Domain Approachsupporting

confidence: 90%

“…The diffusion domain approach is a widely used technique to simulate disk microelectrode arrays 7,8,20 . It consists in assigning its own space to each microelectrode in an array, so that it is diffusionally independent from its neighbours, as outlined in Figure 1.…”

Section: Nanoelectrode Arrays and The Diffusion Domain Approachmentioning

confidence: 99%

“…Compton et al have pointed to four main regimes of behavior affecting diffusional transport to microelectrode arrays. According to the relationship between size of the individual diffusion layer thicknesses, δ, microelectrode size described by their radius, r, and the intercentre distance between microelectrodes, d 7,8 , and with increasing diffusion layer thickness, these four regimes are: (i) planar diffusion to each microelectrode as δ<<r, (ii) radial diffusion to each microelectrode as δ=r<d, (iii) a transition zone when r<δ=<d and (iv) planar diffusion to the microelectrode array when δ>>>d. Regime-ii is the optimum one and it corresponds to the case when the response of the whole array is equivalent to that of a single microdisk, times the number of microelectrodes integrating the array. Regime-iv, on the other hand, consists in a complete overlap of individual diffusion layers that results in the array behaving as an electrode of the size of the entire micro-or nano-electrode array.…”

Section: Introductionmentioning

confidence: 99%

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Mass Transport to Nanoelectrode Arrays and Limitations of the Diffusion Domain Approach: Theory and Experiment

et al. 2009

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RECEIVED DATE (to be automatically inserted after your manuscript is accepted if requiredaccording to the journal that you are submitting your paper to) CORRESPONDING AUTHOR FOOTNOTE. F. Javier del Campo. Tel.: +34-935.947.700; Fax number: +34-935.801.496. 2ABSTRACT. The diffusion domain approach is a general framework for the understanding, interpretation and prediction of the response of microelectrode arrays. This work exposes some of its limitations, particularly when dealing with nanoelectrode arrays of a few microns in size. This article provides an overview of the principles and assumptions underpinning the diffusion domain approach, and then applies it to the study of nanoelectrode arrays. The apparent disagreement between theory and experimental data, due to the importance of radial diffusion to nanoelectrode arrays compared to microelectrode arrays, is explained using simulations and experiments. The principle that an array of micro-or nano-electrodes eventually behaves as if the entire array were a single electrode of the size of the array, with its corresponding properties, applies always. However, while microelectrode arrays tend to behave as macroelectrodes, nanoelectrode arrays on the other hand may behave as microelectrodes.For the case of arrays of small numbers of electrodes, or array sizes of microns or less in size, this compromises one of the key assumptions of the diffusion domain approach, namely that inner electrodes in an array are equivalent, which may lead the unaware to erroneous conclusions.

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Section: Nanoelectrode Arrays and The Diffusion Domain Approachsupporting

confidence: 90%

Section: Nanoelectrode Arrays and The Diffusion Domain Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mass Transport to Nanoelectrode Arrays and Limitations of the Diffusion Domain Approach: Theory and Experiment

et al. 2009

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“…69,74 Note that if ET activity was confined to SWNT ends as proposed, 63, 66 the defect density would be much lower than 1 site every 4 µm, and hence this case can also be considered as a very generous (upper limit) concentration for the case where only ends are active. A Voronoi mesh for the active sites was then calculated so that the diffusional domain method could be applied 78,79 ( Figure 2 (a (iii))).…”

Section: Discrete Site Activitymentioning

confidence: 99%

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

Snowden

Edwards

Rudd

et al. 2013

Phys. Chem. Chem. Phys.

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“…MEs can be also wired in parallel with each microelectrode acting diffusionally independent, resulting in a signal which is typically thousands of times larger. This device, called array, can contain several MEs in both regular and random distributions [3][4][5][6][7][8]. The MEs arrays have been proved to be useful in electroanalysis [9].…”

Section: Electrochemical Transducersmentioning

confidence: 99%

New Developments in Electrochemical Sensors Based on Poly(3,4-ethylenedioxythiophene)-Modified Electrodes

Lupu

2011

International Journal of Electrochemistry

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There is a growing demand for continuous, fast, selective, and sensitive monitoring of key analytes and parameters in the control of diseases and health monitoring, foods quality and safety, and quality of the environment. Sensors based on electrochemical transducers represent very promising tools in this context. Conducting polymers (CPs) have drawn considerable interest in recent years because of their potential applications in different fields such as in sensors, electrochemical displays, and in catalysis. Among the organic conducting polymers, poly(3,4-ethylenedioxythiophene) (PEDOT) and its derivatives have attracted particular interest due to their high stability and high conductivity. This paper summarizes mainly the recent developments in the use of PEDOTbased composite materials in electrochemical sensors.

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The cyclic and linear sweep voltammetry of regular arrays of microdisc electrodes: Fitting of experimental data

Cited by 177 publications

References 12 publications

Mass Transport to Nanoelectrode Arrays and Limitations of the Diffusion Domain Approach: Theory and Experiment

Mass Transport to Nanoelectrode Arrays and Limitations of the Diffusion Domain Approach: Theory and Experiment

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

New Developments in Electrochemical Sensors Based on Poly(3,4-ethylenedioxythiophene)-Modified Electrodes

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