, Dans le cas particulier de la diffusion finie, pour de faibles épaisseurs et en-dessous d'une certaine pulsation ? L , la perturbation est telle qu'il n'y a plus de gradient de concentration dans le film et l'impédance s'identifie au comportement d'une électrode bloquante. Le spectre représentant ce phénomène (figure A-3) témoigne de la présence supplémentaire d'une droite de pente 90° aux fréquences les plus faibles

, Figure A-3 : Représentation graphique d'un spectre d'impédance électrochimique dans le cas d'une

A. Tableau, 2 : Paramètres de calcul obtenus pour trois films colorés Na x WO 3 déposés sur un substrat ITO-verre

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