Theory of ion transport in electrochemically switchable nanoporous metallized membranes.
A physicomathematical model of ion transport through a synthetic electrochemically switchable membrane with nanometric metal-plated pores is presented. Due to the extremely small size of the cylindrical pores, electrical double layers formed inside overlap, and thus, strong electrostatic fields whose intensities vary across the cross-sections of the nanopores are created. Based on the proposed model a relationship between the relative electrostatic energies experienced by ions in the nanopores and the potential applied to the membrane is established. This allows the prediction of transference numbers and explains quantitatively the ion-transport switching capability of such synthetic membranes. The predictions of this model agree satisfactorily with previous experimental data obtained for this type of devices by Martin and co-workers.
Amatore
Christian
C
Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640 PASTEUR, 24 rue Lhomond, 75231 Paris Cedex 05, France. christian.amatore@ens.fr
Oleinick
Alexander I
AI
Svir
Irina
I
D000465:Algorithms; D004563:Electrochemistry; D017136:Ion Transport; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D036103:Nanotechnology; D013816:Thermodynamics
D008567:Membranes, Artificial; D008670:Metals