A gel-free Ti 3 C 2 T x -based electrode array for high-density, high-resolution surface electromyography.

Autor: Murphy BB; Department of Bioengineering, 210 S. 33rd Street, 240 Skirkanich Hall, University of Pennsylvania, Philadelphia, PA, United States 19104., Mulcahey PJ; Department of Chemistry, 37th & O Streets NW, Georgetown University, Washington, DC, United States 20057., Driscoll N; Department of Bioengineering, 210 S. 33rd Street, 240 Skirkanich Hall, University of Pennsylvania, Philadelphia, PA, United States 19104., Richardson AG; Center for Neuroengineering & Therapeutics, 240 S. 33rd Street, 301 Hayden Hall, University of Pennsylvania, Philadelphia, PA, United States 19104., Robbins GT; Department of Physical Medicine & Rehabilitation, 1800 Lombard Street, University of Pennsylvania, Philadelphia, PA, United States 19147., Apollo NV; Center for Neuroengineering & Therapeutics, 240 S. 33rd Street, 301 Hayden Hall, University of Pennsylvania, Philadelphia, PA, United States 19104., Maleski K; Department of Materials Science and Engineering, A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, United States 19104., Lucas TH; Center for Neuroengineering & Therapeutics, 240 S. 33rd Street, 301 Hayden Hall, University of Pennsylvania, Philadelphia, PA, United States 19104., Gogotsi Y; Department of Materials Science and Engineering, A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, United States 19104., Dillingham T; Department of Physical Medicine & Rehabilitation, 1800 Lombard Street, University of Pennsylvania, Philadelphia, PA, United States 19147., Vitale F; Center for Neuroengineering & Therapeutics, 240 S. 33rd Street, 301 Hayden Hall, University of Pennsylvania, Philadelphia, PA, United States 19104.
Jazyk: angličtina
Zdroj: Advanced materials technologies [Adv Mater Technol] 2020 Aug; Vol. 5 (8). Date of Electronic Publication: 2020 Jun 21.
DOI: 10.1002/admt.202000325
Abstrakt: Wearable sensors for surface electromyography (EMG) are composed of single- to few-channel large-area contacts, which exhibit high interfacial impedance and require conductive gels or adhesives to record high-fidelity signals. These devices are also limited in their ability to record activation across large muscle groups due to poor spatial coverage. To address these challenges, we have developed a novel high-density EMG array based on titanium carbide (Ti 3 C 2 T x ) MXene encapsulated in parylene-C. Ti 3 C 2 T x is a two-dimensional nanomaterial with excellent electrical, electrochemical, and mechanical properties, which forms colloidally stable aqueous dispersions, enabling safe, scalable solutions-processing. Leveraging the excellent combination of metallic conductivity, high pseudocapacitance, and ease of processability of Ti 3 C 2 T x MXene, we demonstrate the fabrication of gel-free, high-density EMG arrays which are ~8 μm thick, feature 16 recording channels, and are highly skin-conformable. The impedance of Ti 3 C 2 T x electrodes in contact with human skin is 100-1000x lower than the impedance of commercially-available electrodes which require conductive gels to be effective. Furthermore, our arrays can record high-fidelity, low-noise EMG, and can resolve muscle activation with improved spatiotemporal resolution and sensitivity compared to conventional gelled electrodes. Overall, our results establish Ti 3 C 2 T x -based bioelectronic interfaces as a powerful platform technology for high-resolution, non-invasive wearable sensing technologies.
Competing Interests: Conflict of Interest The authors declare no conflicts of interest.
Databáze: MEDLINE
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