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. Author manuscript; available in PMC: 2021 Dec 23.
Published in final edited form as: J Neural Eng. 2020 Oct 8;17(5):056009. doi: 10.1088/1741-2552/abb7a6

Figure 9.

Figure 9.

Representative SEM micrographs of four centre tripole electrodes following chronic stimulation illustrating the effects of charge recovery on Pt corrosion. (a) Evidence of corrosion associated with stimulation at 267 μC/cm2/phase using electrode shorting alone (grade 4) or (b) 267 AP μC/cm2/phase (grade 3). In contrast, stimulation using CC at (c) 267 μC/cm2/phase (grade 1) or (d) 540 μC/cm2/phase (grade 1) resulted in far less visible Pt corrosion. All electrodes illustrated were stimulated at 200 pps. Scale bar = 20 μm.