A STRETCHABLE NEURAL INTERFACE FOR VAGUS NERVE STIMULATION: FABRICATION AND ELECTROCHEMICAL CHARACTERIZATION

• DOI: 10.31438/trf.hh2022.26
• Publication Date: 2023-09-18T20:22:07Z
• Authors: Jongcheon Lim; Matthew Ward; John Furness; Luis Populin; Hyowon Lee

Soft, stretchable design can improve long-term stability of neural interface devices.Here we present our latest efforts to design, fabricate and evaluate thin-film cuff electrode devices for vagus nerve stimulation, which have Y-shaped kirigami microstructures.We fabricated Y-microstructured thinfilm electrodes by using conventional photolithography reactive ion etching.The monolithic device enables easier transfer a different substrate without having use the traditional PDMS-stamp-based printing technique.We then characterized electrochemical properties electrode/electrolyte evaluated charge injection limits as stimulating electrodes.Although microstructured show up 3.68 times higher impedance than Euclidean geometry due reduced surface area, they 2.13 storage capacities 12.1 % limits, may be useful chronic interface.