About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials and Implants
|
| Presentation Title |
In- Omnidirectionally Stretchable, Biodegradable Mesh Electrode with Re-Entrant Structure for Spatial-Stable Functional Position on Dynamic Organs |
| Author(s) |
Jaewon Kim, Kyung Su Kim, Jahyun Koo |
| On-Site Speaker (Planned) |
Jaewon Kim |
| Abstract Scope |
The electrode, interfacing with soft tissue, is vulnerable to mechanical failure caused by dynamic organ motions. Most internal organs undergo complex, anisotropic volumetric expansion from physiological activity, requiring implanted systems that can withstand multidirectional strains without inducing stress concentration. Furthermore, a system capable of evaluating electrode stability under such dynamic conditions is needed. Conventional elastomers and mesh-structured electrodes with a positive Poisson’s ratio hinder multidirectional uniform stretching, resulting in mechanical mismatch at the tissue–electrode interface, which increases local mechanical load and causes electrode displacement. In this study, we propose a conformal electrode design that incorporates a re-entrant geometry into a stretchable and biodegradable polyurethane substrate. Mechanical testing confirmed that this geometry enhances stretchability and reduces the effective modulus of the electrode by approximately 64%. Furthermore, the device maintained electrical stability under cyclic deformation and preserved its structural integrity under dynamic, organ-mimicking volumetric expansion. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Polymers, Thin Films and Interfaces |