AI Article Synopsis
- The study compares the charge-injection limits of activated iridium oxide electrodes (AIROF) and PtIr microelectrodes of similar size and shape.
- At bias potentials ranging from 0.1 to 0.7 V and frequencies of 20, 50, and 100 Hz, AIROF electrodes demonstrated superior performance, injecting significantly more charge than PtIr.
- Specifically, AIROF could inject 4 to 10 times more charge, reaching a maximum of 3.9 mC/cm² at 0.7 V and 20 Hz frequency.
Article Abstract
The charge-injection limits of activated iridium oxide electrodes (AIROF) and PtIr microelectrodes with similar geometric area and shape have been compared in vitro using a stimulation waveform that delivers cathodal current pulses with current-limited control of the electrode bias potential in the interpulse period. Charge-injection limits were compared over a bias range of 0.1-0.7 V (versus Ag/AgCl) and pulse frequencies of 20, 50, and 100 Hz. The AIROF was capable of injecting between 4 and 10 times the charge of the PtIr electrode, with a maximum value of 3.9 mC/cm2 obtained at a 0.7 V bias and 20 Hz frequency.
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| http://dx.doi.org/10.1109/TBME.2005.851503 | DOI Listing |
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