Electrochemistry of Biosystems
Linking Glucose Oxidation to Luminol-based Electrochemiluminescence using bipolar Electrochemistry
Asymmetric Modification of TiO2 Nanofibers with Gold by Electric-Field-Assisted Photochemistry
Stimuli-responsive microgels for electrochemiluminescence amplification

T. D. Le, L. Zhang, S. Reculusa, G.Vignoles, N. Mano, A. Kuhn, D. Lasseux

ChemElectroChem 2018, in press, doi.org/10.1002/celc.201800972

This article reports on a procedure to predict the optimal thickness of cylindrical porous electrodes operating a single redox reaction. This is obtained from a macroscopic model for the coupled diff usion-reaction process that is first validated with voltammetry experiments of H2O2/H2O reduction reaction carried out with a series of porous electrodes elaborated in this work. An analytical solution to this model is developed in the steady regime and for electrodes featuring a thickness to mean radius ratio small enough compared to unity. An analytical expression of the optimal electrode thickness is derived corresponding to the crossover value of two asymptotic regimes characterizing the dependence of the volume current density produced by the electrode upon its thickness. The predictive tool of the optimal thickness is general, regardless the porous microsctructure. The case of the electrodes used in the reported experiments illustrates that the optimal thickness is not intrinsic to the microsctructure characterized by the size of the representative volume, its speci c area and eff ective diff usion coefficient. It also depends on the operating conditions reflected in the kinetic number, Ki, and the thickness of the di ffusion layer surrounding the electrode. The dependence of the optimal thickness on these two parameters is quite signicant in a range of very small values of Ki but remains quasi constant beyond a threshold value.

2018 12

Potential Induced Fine-tuning the Enantioaffinity of Chiral Metal Phases

Sunday, 16 December 2018
S. Assavapanumat, T. Yutthalekha, P. Garrigue, B. Goudeau, V. Lapeyre, A. Perro, N. Sojic, C. Wattanakit, A. Kuhn Angew. Chem. Int. Ed. (2018) in press Concepts leading to single enantiomers of chiral molecules are of crucial importance for many... Read More...

Surface-confined Electrochemiluminescence Microscopy of Cell Membranes

Wednesday, 14 November 2018
S. Voci, B. Goudeau, G. Valenti, A. Lesch, M. Jović, S. Rapino, F. Paolucci, S. Arbault, N. Sojic J. Am. Chem. Soc., 140, 2018, 14753-14760 Herein is reported a surface-confined microscopy based on electrochemiluminescence (ECL) that allows to... Read More...

Enhanced Annihilation Electrochemiluminescence by Nanofluidic Confinement

Wednesday, 14 November 2018
Hanan Al-Kutubi, Silvia Voci, Liza Rassaei, Neso Sojic, Klaus Mathwig Chem .Sci., 9, 2018, (2018 Chemical Science HOT Article Collection) Microfabricated nanofluidic electrochemical devices offer a highly controlled nanochannel geometry; they... Read More...