Figure 4
From: Mapping of bionic array electric field focusing in plasmid DNA-based gene electrotransfer
Electric field recordings. (a) Image of the 8-node linear (cochlear implant) electrode array with voltage-sensing electrode ~500 μm lateral to electrode 7. (b) Voltage measurements from the position shown in (a) with increasing voltage applied to the array in tandem configuration (100 ms pulses, stepped in 0.5 V increments to 4 V). Inset shows the eight 0.5 V increments of applied voltage (range 0–4 V). Sustained electric potentials are evident at >2 V as the surface charging exceeds the faradaic capacity of the electrodes.
