| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Printed Electronics and Additive Manufacturing: Advanced Functional Materials, Processing Concepts, and Emerging Applications
|
| Presentation Title |
Liquid metal printed ultraconductive transparent two-dimensional oxides for wearable bioelectrodes |
| Author(s) |
William J. Scheideler |
| On-Site Speaker (Planned) |
William J. Scheideler |
| Abstract Scope |
Conducting oxides are critical materials for next generation displays, solar cells, and sensors, but their high process temperatures and poor mechanical properties limit use in flexible electronics. We overturn these limitations via ultrafast, low-temperature fabrication of durable wearable electrodes via liquid metal printing of highly flexible two-dimensional (2D) conducting oxides. Our automated process based on Cabrera Mott oxidation deposits ultrathin (2 – 10 nm thick) 2D indium tin oxide (ITO) with >95% transparency and superlative conductivity (> 1300 S/cm) on par with sputtered films. We leverage hypoeutectic In-Sn for printing 2D ITO at < 140 ºC on polymer substrates. Our detailed characterization reveals the efficacy of Sn-doping, the crystalline nature, and large, platelike grain morphology formed by the liquid metal reaction environment. Finally, we demonstrate significant enhancement to bending strain tolerance, high scratch resistance, and low contact impedance to skin as a wearable bioelectrode for electrocardiography (ECG) and plethysmography (PPG). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electronic Materials, Additive Manufacturing, Nanotechnology |