MXtrodes: MXene-infused bioelectronic interfaces for multiscale electrophysiology and stimulation

Nicolette Driscoll, Brian Erickson, Brendan B. Murphy, Andrew G. Richardson, Gregory Robbins, Nicholas V. Apollo, Tyler Mathis, Kanit Hantanasirisakul, Puneet Bagga, Sarah E. Gullbrand, Matthew Sergison, Ravinder Reddy, John A. Wolf, H. Isaac Chen, Timothy H. Lucas, Timothy Dillingham, Kathryn A. Davis, Yury Gogotsi, John D. Medaglia, Flavia Vitale
2021 · doi:10.1101/2021.03.01.433237
preprint OA: closed CC-BY-NC-ND-4.0
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Abstract

Soft bioelectronic interfaces for mapping and modulating excitable networks at high resolution and at large scale can enable paradigm-shifting diagnostics, monitoring, and treatment strategies. Yet, current technologies largely rely on materials and fabrication schemes that are expensive, do not scale, and critically limit the maximum attainable resolution and coverage. Solution processing is a cost-effective manufacturing alternative, but biocompatible conductive inks matching the performance of conventional metals are lacking. Here, we introduce MXtrodes, a novel class of soft, high-resolution, large-scale bioelectronic interfaces enabled by Ti 3 C 2 MXene and scalable solution processing. We show that the electrochemical properties of MXtrodes exceed those of conventional materials, and do not require conductive gels when used in epidermal electronics. Furthermore, we validate MXtrodes in a number of applications ranging from mapping large scale neuromuscular networks in humans to delivering cortical microstimulation in small animal models. Finally, we demonstrate that MXtrodes are compatible with standard clinical neuroimaging modalities.

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License: CC-BY-NC-ND-4.0