Voltammetric and impedance analysis of dimethyldioctadecylammoniunl/Prussian Blue Langmuir-Blodgett films on ITO electrodes

New hybrid Langmuir-Blodgett (LB) films containing Prussian Blue have been studied by cyclic voltammetry and electrochemical impedance spectroscopy. T he dependencies of the cyclic voltammetry response on the number of deposit ed layers and the scan rate are described and show that the hybrid LB films can be considered as a quasi-reversible system with a finite diffusion spa ce. On the basis of the impedance spectroscopy results, the charge transpor t process through the lamellar materials is modeled with an equivalent circ uit considering two kinds of charge transport. The diffusion coefficients a ssociated with the motions of the charged species are found to be very smal l, reflecting the fact that the insulating lipid layers considarebly hinder the diffusion of the charged species.