Mathematical modelling and numerical simulation of cyclic voltammetry at an electrode covered with an insulating film containing cylindrical micropores

Electrochemical characterization of a 1,8-octanedithiol self-assembled monolayer (ODT-SAM) on a Au(111) single crystal electrode

“…The electron transfer at electrodes that can possess pinholes or defects can occur in three ways [23,26,35]: (1) by tunnelling of electron through the monolayer; (2) by permeation of the redox species into the monolayer and electron transfer at the electrode; (3) by …”

“…Cyclic voltammetry has been used to calculate the size, number and chemical characteristics of defects produced at monolayers on the basis of the changes in electron transfer kinetics [30][31][32]. This method estimates pinhole parameters by determining the scan rate at which the peak current was no longer lineal with the square root of the scan rate [30][31][32][33][34] or in the cases where radial diffusion becomes the dominant regime, by the use of a numerical simulation computer program [35]. However, the fractional coverage estimated from the cyclic voltammetric peak current is quantitatively different from values obtained by other methods.…”

Interaction of Potential Sources in Infinite 2D Arrays: Diffusion through Composite Membranes, Micro‐Electrochemistry, Entrance Resistance, and Other Examples

“…This conclusion can be important in view of the discussion on the applicability of cylindrical diffusion domains versus hexagonal or square ones in the interpretation of electrochemical measurements with arrays of microelectrodes. [ 25,26 ] Of course, our analysis pertains only to steady‐state conditions, whereas more complex nonstationary phenomena manifest themselves in a major part of electrochemical techniques.…”

“…The concept of “diffusion domain” has also been used for the simulation of chrono‐amperometry with arrays of microelectrodes in a number of studies. [ 5,6,17,24–26,28 ] The corresponding nonstationary phenomena are more complex, so their description called for the use of approximations, limiting cases, and (semi‐empirical) interpolations between them. [ 29,30 ] As a result, the issue of quantitative applicability of numerically simpler cylindrical cells (diffusion domains) as compared to the rigorous square and/or hexagonal cells has remained unaddressed.…”

Fabrication of Nanoelectrode Arrays for Dopamine Detection

“…The study finds that the natural convectional forces influence voltammetry signal at microelectrodes which are reputed to be immune and call for further decreasing the size of electrodes to nano domain to reduce the effects. There have been studies on optimizing nanoelectrode array geometric parameters which effect the electrochemical response by studying the qualitative influence of mass transport, effect of scan rate on the signal by changing the parameters such as nanoelectrode distribution and its radius [24][25][26][27][28][29] . Godino et.…”