Cyclic voltammetry at a regular microdisc electrode array

Voltammetry of redox analytes at trace concentrations with nanoelectrode ensembles

“…our NEE with A geom of 0.005 cm 2 contains 4.8 × 10 6 nanoelectrodes). Note that NEEs warranty such an independence on the ensemble size for overall geometric areas much lower than those required for achieving comparable results with arrays of micrometer sized electrodes [9]. This is particularly attractive when thinking to apply the advantages of the use of arrays/ensembles of microelectrodes to analyses in samples of very small volume.…”

“…1 has no practical influence on the signal characteristics. Literature results obtained by the simulation of CVs at ultramicroelectrode arrays [9] indicate that such an independence is observed when the number of active elements in an array/ensemble approaches infinite. This appears to be the case even for the ensemble with smallest geometric area used by us (namely, 0.008 cm 2 with about 4.8 × 10 6 nanodiscs).…”

“…The theory developed by Amatore et al [7] for electrodes with partially blocked surface has been applied successfully for measuring heterogeneous electron transfer rate constants at NEEs [3,8]. Cyclic voltammetric responses at regular microdisc electrode arrays were also simulated recently [9], showing that there is a minimum number of elements in the array above which the normalized current response become independent on the size of the array.…”

Electrochemical Behavior of Nanoelectrode Ensembles in the Ionic Liquid [BMIm][BF4]

“…Thus detection limits at NEEs are 2 -3 orders of magnitude lower than at regular electrodes [1 -3, 6]. In the case of ensembles with the same active area, higher Faradaic currents are achieved indeed when operating under pure radial conditions [7]. The transition from the TO to the PR regime for NEEs has been demonstrated experimentally as a function of the template pore density [8], however the pure radial regime was achieved only with custom made membranes.…”

Boron doped diamond microelectrodes arrays for electrochemical detection in HPLC

“…Theoretical studies were led to propose the best arrangement of the microelectrodes in the arrays. Usually done in static medium, they give a good idea for the distances between microelectrodes to get the different signal regimes for further studies in continuous flow [12].…”