Electrical Characterization of Platinum, Stainless Steel and Platinum/Iridium as Electrode Materials for a New Neural Interface

摘要

This paper describes the design and fabrication of a 48-channel microelectrode, based on laser-patterned sili-cone rubber (polydimethylsiloxane, PDMS) and different metal foils. Samples with platinum, platinum/iridium and stainless steel as electrode materials were fabricated and elec-trochemically characterized. The electrochemical performance was investigated by electrical impedance spectroscopy. Supplementary, pulse tests were carried out, in order to calculate the charge injection capacities. All samples have the same contacts sizes, what allows a comparison between the three different metal foils.