Figure 4From: In vitro and in vivo evaluation of a photosensitive polyimide thin-film microelectrode array suitable for epiretinal stimulationMorphology of the L929 cells growing directly on the microelectrode. Impedance (a) and phase (b) for all electrodes (n = 3); impedance (c) and phase (d) for the upper and bottom layers of the same arrays.Back to article page