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. Author manuscript; available in PMC: 2018 May 9.
Published in final edited form as: Neuromodulation. 2017 Oct 27;20(8):745–752. doi: 10.1111/ner.12716

Figure 5.

Figure 5

Scanning electron micrograph of a fire-sharpened carbon fiber electrode tip before (left) and after (right) electrodeposited iridium oxide film (EIROF) coatings. EIROF coatings improved the electrochemical properties of the electrode. The nodular surface morphology of EIROF creates a higher electrochemical surface area for charge transfer. With appropriate positive biasing, EIROF coated carbon fiber can readily injected 4 nC/ph in a 200 μs and 400 μs pulses without exceeding water electrolysis limits.