About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials and Implants
|
| Presentation Title |
Surface and Layer Modification of PEDOT:PSS-Coated Au Neural Electrodes for Chronic Stability |
| Author(s) |
Gilmo Kim, Minki Hong, Jahyun Koo |
| On-Site Speaker (Planned) |
Gilmo Kim |
| Abstract Scope |
High-fidelity neural signal acquisition is essential for brain–computer interfaces and neural monitoring, but long-term performance is often limited by instability at the electrode–tissue interface. PEDOT:PSS coatings reduce interfacial impedance through mixed ionic–electronic conductivity and high volumetric capacitance; however, weak adhesion to metallic substrates and polymer degradation can induce delamination under physiological conditions.
Here, we present a dual-engineering strategy for improving the electrochemical performance and stability of PEDOT:PSS-coated Au neural electrodes. Au surfaces were chemically etched to increase roughness and promote mechanical interlocking with the conducting polymer. In parallel, carbon nanotubes were incorporated into the EDOT/PSS precursor and co-electrodeposited to reinforce the PEDOT:PSS layer. Compared with untreated electrodes, the engineered electrodes exhibited reduced impedance and improved stability during simulated physiological aging. These results suggest that combining substrate surface engineering with conductive polymer composite design can enhance the long-term reliability of neural interfaces. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Electronic Materials, Surface Modification and Coatings |