Three-dimensional MXene/carbon nanotube composite electrodes in flexible 64-channel arrays for noninvasive electromyography signal acquisition  

柔性64通道三维MXene/碳纳米管复合电极阵列用于无创肌电信号采集

作　　者：Lian Cheng Aiying Guo Jun Li Mengjiao Li Qiang Lei Wen Xu Xiaolin Guo Jianhua Zhang 程连;郭爱英;李俊;李梦娇;雷强;许汶;郭潇林;张建华(School of Microelectronics,Shanghai University,Shanghai,201800,China;Key Laboratory of Advanced Display and System Applications,Ministry of Education,Shanghai University,Shanghai,200072,China)

机构地区：[1]School of Microelectronics,Shanghai University,Shanghai,201800,China [2]Key Laboratory of Advanced Display and System Applications,Ministry of Education,Shanghai University,Shanghai,200072,China

出　　处：《Science China Materials》2024年第9期2977-2984,共8页中国科学（材料科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China(52227808);the National Science Foundation for Distinguished Young Scholars of China(51725505);the Shanghai Science and Technology Commission(19JC1412400);the Development Fund for Shanghai Talents(2021003);the Shanghai Collaborative Innovation Center of Intelligent Perception Chip Technology。

摘　　要：Non-invasive surface electromyography(sEMG)electrodes have vast potential in fields such as healthcare,human-computer interaction,and entertainment,providing diverse information related to electromyographic signals.Non-invasive sEMG electrodes reduce user risks but gather sEMG signals of lower quality compared to invasive ones.Currently,various advanced electrode materials have been developed for detecting physiological electrical signals,but the majority of them are single channel electrodes.Here,we report 64-channel three-dimensional(3D)Ti_(3)C_(2)MXene/CNT composite electrodes fabricated using bonding-driven self-assembly technologies.These electrodes are characterized by low skin-electrode contact impedance and a high signal-to-noise ratio(SNR)for collection of EMG signals.These electrode arrays exhibit remarkable flexibility,conforming seamlessly to the skin’s curvature.Specifically,the skin-electrode contact impedance of 3D Ti_(3)C_(2)MXene/CNT electrodes decreases by 10-fold compared to Ag/AgCl gel electrodes at a frequency of 100 Hz.Furthermore,when collecting sEMG signals from the arm,the prepared Ti_(3)C_(2)MXene/CNT electrodes exhibit lower baseline noise and higher SNR compared to Ag/AgCl gel electrodes.Furthermore,Ti_(3)C_(2)MXene/CNT electrodes can collect sEMG signals of different hand gestures,while maintaining a high SNR(∼25 dB).By combining machine learning,sEMG signals from different gestures can be identified with a recognition rate exceeding 90%.The exceptional performance and scalability of these 3D Ti_(3)C_(2)MXene/CNT electrodes indicate a promising future for shaping electronic skin and wearable device technologies.非侵入性表面肌电(sEMG)电极在医疗、人机交互和娱乐等领域有广阔的应用前景,能提供与肌电信号相关的多种信息.非侵入sEMG电极虽然降低了用户风险,但采集到的信号质量低于侵入性电极.目前,已开发出各种先进的电极材料用于检测生理电信号,但它们大多数是单通道电极.本文报告了使用粘结驱动自组装技术制备的64通道三维(3D)Ti_(3)C_(2)MXene/CNT复合电极,它具有低皮肤电极接触阻抗和高信噪比(SNR)的特点,可用于收集EMG信号.该电极阵列具有高柔韧性,能完美贴合皮肤.在100 Hz时,3D Ti_(3)C_(2)MXene/CNT电极接触阻抗比Ag/AgCl凝胶电极低了10倍.此外,收集手臂sEMG信号时,Ti_(3)C_(2)MXene/CNT电极比Ag/AgCl凝胶电极显示出更低的基线噪声和更高的SNR.Ti_(3)C_(2)MXene/CNT电极能在保持高SNR(约25 dB)的同时,收集不同手势的sEMG信号.结合机器学习,可以识别不同手势的sEMG信号,识别率超过90%.上述3D Ti_(3)C_(2)MXene/CNT电极的卓越性能和可扩展性表明该电极在电子皮肤和可穿戴设备技术的未来发展中具有光明的应用前景.

关 键 词：electrodes surface electromyography skin-contact impedance Ti_(3)C_(2)MXenes CNTS 

分 类 号：O657.1[理学—分析化学] R318[理学—化学]