Analysis of positive feedback currents at the scanning electrochemical microscope

Analytical Expressions for Quantitative Scanning Electrochemical Microscopy (SECM)

“…When L is theoretically decreased (again this is no more an experimentally achievable situation), the non-disturbed area of electrolyte (c = [6] the efforts of the SECM community in this field are sustained until 2004. [16,[28][29][30][31] One may underline that one of the first papers [28] is still often used in todays literature although it is not the more accurate (see [18,25] should soon replace all previous works because for the first time, the authors exhibit approximate analytical expressions with R g and L as analytical variables (and not only L as before). Only these last expressions are reproduced in this review.…”

On the behaviour of doped SnO2 anodes stabilized with platinum in the electrochemical degradation of reactive dyes

“…The RG of our UME tip is RG ≥ 20. According to [15], Pade's approximation gives an approximate and simple equation with less relative error for all distances and valid for RG > 10. The approximate expression of the steady-state normalized current assuming positive feedback for finite insulator thickness is:…”

“…(2) and (3), respectively. L range [0 [4][5][6][7][8][9][10][11][12][13][14][15]. where L = d/a (d is the UME-substrate separation and a is the tip radius) and IT(L) the normalized current defined as a function of L.…”

A very easy kinetics determination for feedback curves with a microdisk SECM tip and rather rapid substrate reaction

“…However, both new approximations are better. (13) gives a maximum relative error of 1.3% for L > 0.05. The best approximation is the translated curve (12) as the relative error stay in this case below 1% for any L > 0.08.…”