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. 2018 Nov 1;13(11):e0206137. doi: 10.1371/journal.pone.0206137

Fig 2. Impedance characterization.

Fig 2

(A) Impedance modulus at 1 kHz of the uncoated, collagen collagen-fibronectin coated arrays. (B-D) Magnitude and phase spectra of the impedance measured in vitro of the Au-parylene electrode arrays (B) uncoated or coated with 20 μm film of (C) collagen, (D) collagen-fibronectin (n = 8). Overlaid lines are the impedance modulus and phase calculated from fitting the experimental data with equivalent circuit models in (E) and (F). (E, F) Equivalent circuit of the electrode/electrolyte interface of the (E) uncoated Au-parylene and (F) ECM coated arrays.