Figure 8.
(A) Impedance spectra for bare Au ABP electrodes (black squares), PEDOT-coated electrodes (blue triangles), bare Au ABP electrodes seeded with SY5Y cells (pink squares), SY5Y cells in PEDOT matrix (green triangles), and SY5Y cell-templated PEDOT (red triangles) graphed as Log Z vs. AC frequency. (B) Phase angle of the impedance for bare Au ABP electrodes (black squares), PEDOT-coated electrodes (blue triangles), bare Au ABP electrodes seeded with SY5Y cells (pink squares), SY5Y cells in PEDOT matrix (green triangles), and SY5Y cell-templated PEDOT (red triangles) graphed as phase angle (degrees) vs. AC frequency. (C) 1 kHz impedance values normalized for surface area for comparison on the same graph. ABP electrodes coated with PEDOT (blue squares), SY5Y cells in PEDOT matrix (green squares), and SY5Y cell-templated PEDOT (red squares) are compared to PEDOT coatings on electrode sites of MEMS neural probes from Xiao et al. 2003 (gray circles and Yang et al. 2004 (gray triangles).