Table 3.
Diffusional parameters for PPy film, PPy NTs, PEDOT film, and PEDOT NTs were electropolymerized on the neural microelectrodes with applied charge density of 1.44 C/cm2 by fitting experimental EIS data to the model in Figure 3. Data are shown for ± standard deviation (N = 10 for each case).
L (μm) |
τT (ms) |
RT (kΩ) |
CT (μF) |
D ×10-6 (cm2/s) |
εr | |
---|---|---|---|---|---|---|
PPy film | 10 ± 0.5 | 34.2 ± 2.6 | 108.3 ± 5.0 | 0.32 ± 0.06 | 29.2 ± 1.1 | 3.6 ± 0.3 |
PPy NTs | 12 ± 0.4 | 19.9 ± 1.5 | 43.9 ± 5.0 | 0.45 ± 0.12 | 72.4 ± 3.3 | 8.6 ± 0.4 |
PEDOT film | 4 ± 0.3 | 21.6 ± 2.8 | 23.6 ± 3.6 | 0.91 ± 0.17 | 7.4 ± 2.1 | 3.5 ± 0.3 |
PEDOT NTs | 4.5 ± 0.4 | 15.6 ± 2.0 | 12.9 ± 2.5 | 1.21 ± 0.32 | 13.0 ± 1.8 | 7.0 ± 1.5 |