Publication | Open Access
Low-Impedance, High Surface Area Pt-Ir Electrodeposited on Cochlear Implant Electrodes
28
Citations
10
References
2018
Year
Medical ElectronicsOptical MaterialsHigh Surface AreaEngineeringMicroscopyBiomedical EngineeringWireless Implantable DevicePlasma MedicineCochlear Implant ElectrodesHearing AidsPt-ir CoatingBiomedical DevicesPulse PowerElectrochemical InterfaceCochlear Implant CommunicationHealth SciencesMaterials ScienceElectrical EngineeringImplantable SensorImplantable DeviceElectrochemistryBiomedical DiagnosticsBioelectronicsSurface ScienceApplied PhysicsPulsed Electric FieldElectrophysiologyCochlear ImplantPolarization ImpedanceCochlear ImplantationElectrochemical Surface Science
A high surface area, Pt-Ir coating was electrodeposited onto the contacts of Advanced Bionics HiFocus 1j electrode arrays. The coating was imaged using optical and scanning electron microscopy (SEM) and the impedance was directly measured using clinically relevant voltage transients of biphasic pulses as short as 17 μs. The coating, which SEM showed to completely cover the underlying substrate, decreased the polarization impedance of 17 μs and 32 μs pulses by 91% and 93%, respectively.
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