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. Author manuscript; available in PMC: 2022 Jun 17.
Published in final edited form as: J Neural Eng. 2021 Jun 17;18(4):10.1088/1741-2552/ac02dc. doi: 10.1088/1741-2552/ac02dc

Figure 8.

Figure 8.

LCP-TF electrodes were electroplated with platinum iridium (PtIr) to reduce electrode impedance and enable stimulation. (A) SEM picture of the PtIr-plated electrode surface. (B) Impedance measurement comparing gold electrodes (44 ± 13.9 kΩ) before PtIr coating and after (4.6 ± 1.8 kΩ) at 1 kHz. The red line in the boxplot indicates the median value. All data points are shown as the dots within the box plot (N = 60). (C) Electrode impedance spectroscopy (EIS) measurements of 12 electrodes taken before and after 1 M pulses of biphasic stimulation at 100 μs per phase, 124 μA, and 50 Hz repetition rate showed no change in electrode impedance. The lines are the average impedances. No damage to the electrode contacts was observed.