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Nanofractal Electrode Coating

Instrumentation | Recording

Instrument Type(s) (it can fall under multiple categories and subcategories)
Electrodeposited platinum iridium nanofractal coating for improved electrode efficiency, reduced impedance, and increased robustness

Make and Model of the Equipment

Description of what it is used for
PtIr nanofractal coatings can be deposited on 3D microelectrodes to reduce electrode impedance and increase microstimuliation capacity. 

Description of its capabilities
Thin-films that are not capable of supporting long-term electrical stimulation, due to poor robustness, can be coated with PtIr films to significantly increase the longevity for microstimulation applications. 1 kHz impedance can be reduced by 2 orders of magnitude vs. an uncoated electrode. The films are mechanical robust and withstand repeated insertion into brain.

Location (Research Facility)
PtIr coating samples can be obtained by providing MINT with a device to be coated. Coating is done at either Platinum Group Coatings (industry partner) or at MINT (starting Fall 2018).

Link to a User Manual

Other relevant documents related to the equipment

Type of research that was enhanced by its use
Long-term recording of action potentials (more spikes/channel) [1], more efficient pulse delivery with cochlear implant electrodes [2], reduced electrode impedance for cardiac electrotherapy [3]
[1] Isaac R. Cassar, Artin Petrossians, John J. Whalen, Curtis D. Lee, Jason Sharkey, Chunxiu Yu, and Warren M. Grill, Electrodeposited Platinum-Iridium Coating (EPIC) Improves In-Vivo Chronic Recording Performance of Microwire Electrode Arrays (MEA), SfN 2017

[2] Curtis D. Lee, Eric M. Hudak, John J. Whalen III, Artin Petrossians, and James D. Weiland, Low-Impedance, High Surface Area Pt-Ir Electrodeposited on Cochlear Implant Electrodes. J.. Electrochem. Soc. 2018 volume 165, issue 12, G3015-G3017

[3] Xu, Lizhi, Sarah R. Gutbrod, Yinji Ma, Artin Petrossians, Yuhao Liu, R. Chad Webb, Jonathan A. Fan et al. "Materials and fractal designs for 3D multifunctional integumentary membranes with capabilities in cardiac electrotherapy." Advanced materials 27, no. 10 (2015): 1731-1737