Figure 4: Impedance spectroscopy sweeping from 1 Hz to 100 kHz. (a) Module versus frequency and noise level (in dashed frame) before and after PB-plating. Average values are of 60 electrodes from 5 biosensors. (b) Module versus frequency of MEA (after PB-plating) with and without tissue. Average values are of 44 electrodes from 5 biosensors. Here, the discussed electrodes are those covered by the cardiac slices. Standard error bars are also indicated.
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