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Liu Y, Xu B, Xie Z, Yang J, Liu Y, Yang Y, Xu H. Intrinsically Stretchable, Self-Healing, and Large-Scale Epidermal Bioelectrode Arrays for Electrophysiology and Gesture Recognition. ACS APPLIED MATERIALS & INTERFACES 2023; 15:59787-59794. [PMID: 38097388 DOI: 10.1021/acsami.3c13942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Electrophysiological (EP) signals, referred to as low-level biopotentials driven by active or passive human movements, are of great importance for kinesiology, rehabilitation, and human-machine interaction. To capture high-fidelity EP signals, bioelectrodes should possess high conductivity, high stretchability, and high conformability to skin. While traditional metal bioelectrodes are endowed with stretchability via complex structural designs, they are vulnerable to external or internal inference due to their low fracture strain and large modulus. Here, we report a self-healing elastic composite of silver nanowire (AgNW), graphite nanosheet, and styrene-block-poly(ethylene-ran-butylene)-block-polystyrene, which exhibits high stretchability of ε = 500%, high conductivity of σ = ∼1923 S·cm-1, and low resistance change (ΔR/R0) of 0.14 at ε = 40% while its resistance increases ∼0.8% after a 24 h stretching operation at ε = 50%. We employed the elastic composites for accurate and stable monitoring of electrocardiograph and surface electromyography (sEMG) signals. Further, we demonstrate an all-solution and printable process to obtain a large-scale sEMG bioelectrode array, enabling highly conformal adhesion on skin and high-fidelity gesture recognition.
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Affiliation(s)
- Yifan Liu
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Baobao Xu
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Zhixin Xie
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Jiaxin Yang
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Yutong Liu
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Yiyi Yang
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
| | - Haihua Xu
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China
- Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
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