Bioelectrical signals,especially electroencephalography(EEG)and electrocardiography(ECG),are indispensable for health assessment.However,achieving high-quality signal acquisition while ensuring long-term stability rem...Bioelectrical signals,especially electroencephalography(EEG)and electrocardiography(ECG),are indispensable for health assessment.However,achieving high-quality signal acquisition while ensuring long-term stability remains a significant challenge in the bioelectrical electrodes.Herein,a cholinium-based eutectogel(ChCl-egel)is reported for dynamic ECG and EEG monitoring.By utilizing hydrogen bonding of deep eutectic solvents(DESs)to modulate conductivity,the ChCl-egel realizes an ultra-low skin impedance(4.7 kΩat 10 Hz)with reliable stability.Additionally,the ChCl-egel exhibits excellent conformal contact and biocompatibility.During ECG monitoring,the ChCl-egel offers an 8 dB improvement in signal-to-noise ratio(SNR)compared to commercial ECG electrodes(3 M,Red Dot)over 48-hour period,enabling dynamic record under high-intensity exercises.In an 18-hour steadystate visual evoked potential(SSVEP)experiment,it can match the scalp impedance of commercial gel and support longer record.With high-quality dynamic monitoring capability,the ChCl-egel provides a promising solution for long-term bioelectrical signal acquisition.展开更多
基金supported by the National Science and Technology Major Project Fund of China under Grant 2025ZD0215600the General Program of Natural Science Foundation of Beijing Grants No.7242271+5 种基金the National Natural Science Foundation of China(NSFC)under grant No.92472106,52325312,52421001,52388201Beijing Municipal Science&Technology Commission,Administrative Commission of Zhongguancun Science Park,under grant No.Z231100006023020Youth Program of NSFC Grants No.12102224Shanghai Special Fund for Industrial High Quality Development:Pioneering Industries Innovation and Development Projects Grants No.2024-GZL-RGZN-02026Beijing University of Posts and Telecommunications Excellent Ph.D.Students Foundation(grant No.CX20241089)the Start-up Funding of Beijing University of Posts and Telecommunications(grant No.500422817 and 510224039).
文摘Bioelectrical signals,especially electroencephalography(EEG)and electrocardiography(ECG),are indispensable for health assessment.However,achieving high-quality signal acquisition while ensuring long-term stability remains a significant challenge in the bioelectrical electrodes.Herein,a cholinium-based eutectogel(ChCl-egel)is reported for dynamic ECG and EEG monitoring.By utilizing hydrogen bonding of deep eutectic solvents(DESs)to modulate conductivity,the ChCl-egel realizes an ultra-low skin impedance(4.7 kΩat 10 Hz)with reliable stability.Additionally,the ChCl-egel exhibits excellent conformal contact and biocompatibility.During ECG monitoring,the ChCl-egel offers an 8 dB improvement in signal-to-noise ratio(SNR)compared to commercial ECG electrodes(3 M,Red Dot)over 48-hour period,enabling dynamic record under high-intensity exercises.In an 18-hour steadystate visual evoked potential(SSVEP)experiment,it can match the scalp impedance of commercial gel and support longer record.With high-quality dynamic monitoring capability,the ChCl-egel provides a promising solution for long-term bioelectrical signal acquisition.
