PMID-25627426 Rapid evaluation of the durability of cortical neural implants using accelerated aging with reactive oxygen species.
- Takmakov P1, Ruda K, Scott Phillips K, Isayeva IS, Krauthamer V, Welle CG.
- TDT W / PI implants completely failed (W etched and PI completely flaked off) after 1 week in 87C H2O2 / PBS solution. Not surprising.
- In the Au plated W, the Au remained, the PI flaked off, while thin fragile gold tubes were left. Interesting.
- Pt/Ii + Parylene-C microprobes seemed to fare better; one was unaffected, others experienced a drop in impedance.
- NeuralNexus (Si3N4 insulated, probably, plus Ir recording pads) showed no change in H2O2 RAA, strong impedance drop (thicker oxide layer?)
- Same for blackrock / utah probe (Parylene-C), though there the parylene peeled from the Si substrate a bit.
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