Book Chapter

Electrochemical Principles of Safe Charge Injection

SF Cogan, DJ Garrett, RA Green

Neurobionics: The Biomedical Engineering of Neural Prostheses | Published : 2016

Abstract

Summary: Proper selection of stimulation parameters, such as the pulse frequency, pulse width and the duty cycle, is important during charge injection for obtaining the desired functional response and ensuring that the stimulation is delivered without electrode corrosion or tissue damage. This chapter describes two categories of charge transfer at the electrode-tissue interface: capacitive charge transfer by double-layer charging, and Faradaic charge transfer in which species are oxidized or reduced. Lists of electrode materials suitable for chronic recording and stimulation are limited to platinum and its alloys with iridium, porous titanium nitride and, to a lesser extent, iridium oxide, a..

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University of Melbourne Researchers

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