Kirigami‐Structured, Low‐Impedance, and Skin‐Conformal Electronics for Long‐Term Biopotential Monitoring and Human–Machine Interfaces

Xia, Meili; Liu, Jianwen; Kim, Beom Jin; Gao, Yongju; Zhou, Yunlong; Zhang, Yongjing; Cao, Duxia; Zhao, Songfang; Li, Yang; Ahn, Jong‐Hyun

doi:10.1002/advs.202304871

Cited by 14 publications

(1 citation statement)

References 58 publications

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“…41 Furthermore, Xia et al demonstrated kirigamistructured epidermal electrodes composed of PEDOT:PSS/ polyvinyl alcohol(PVA)/Ag NWs/polyurethane, featuring high stretchability, low interfacial impedance, and skin conformity. 42 Although these electrodes can conform well to human skin under various deformations and are utilized as stretchable epidermal electrodes, the absence of self-healing capabilities may render the electrodes susceptible to damage during utilization, particularly when subjected to stressful conditions such as severe compression, torsion, or stretching. Such conditions can significantly compromise the longevity of the electrode, thereby limiting its overall performance and durability.…”

Section: ■ Introductionmentioning

confidence: 99%

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Yu,

Luo,

Ouyang

et al. 2024

ACS Appl. Electron. Mater.

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Dry electrodes are vital tools for monitoring physiological signals in various applications. However, conventional dry electrodes encounter various limitations such as insufficient adhesion, poor antidisturbance, and discomfort in wearable electronics. In response to these challenges, this study introduces a polymeric dry electrode with excellent stretchability and low modulus to ensure comfort during signal acquisition. Furthermore, it features a low skin interface impedance, robust adhesion, and self-healing capabilities, ensuring reliable electrophysiological signal collection. The performance of the electrode can be rapidly restored with a self-healing capability when damaged in operation, and it can be broken into fragments when submerged in water after use due to its good solubility. Owing to the low interface impedance, good adhesion, self-healing capability, and water solubility, this dry electrode demonstrates significant advantages in high-quality and comfortable monitoring electrooculograms (EOG), electrocardiograms (ECG), and electromyograms (EMG). It shows the potential to provide reliable technical support for health monitoring and medical diagnosis while also reducing environmental impact.

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Section: ■ Introductionmentioning

confidence: 99%

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Yu,

Luo,

Ouyang

et al. 2024

ACS Appl. Electron. Mater.

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On‐Skin Paintable Water‐Resistant Biohydrogel for Wearable Bioelectronics

Luo,

Sun,

Chang

et al. 2024

Adv Funct Materials

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To achieve accurate monitoring of bioelectrical signals, it is essential to use customizable bioelectrodes that can self‐adapt to the skin's surface topography. Ion‐conducting hydrogel has received significant attention in this field due to its softness, adhesion, and skin‐like mechanical properties. However, these bioelectrodes currently suffer from degradation of adhesion, electrical conductivity, and skin‐compliance when exposed to aqueous environments. This significantly limits the application of bioelectrodes. Herein, a customizable biohydrogel that can be applied on skin or fabric by solvent volatilization for liquid ink‐gel film conversion is reported. The biohydrogel's distinct characteristic of transitioning between a liquid and hydrogel phase establishes superb conformal contact and dynamic compliance with the epidermis. This effectively eliminates motion artifacts and results in lower contact impedance and noise in both static and dynamic states when compared to existing bioelectrodes. The biohydrogel is applied to the cotton fabric to create electrocardiogram (ECG) monitoring garments. These garments enable the acquisition of ECG signals with high accuracy in aqueous environment for over 72 h. Besides, the biohydrogel‐based garments outperform the commercial gel electrodes by 83.5% in signal‐to‐noise ratio. Additionally, the cotton/biohydrogel electrode facilitates multi‐channel, high‐fidelity recording of ECG signals, enabling high‐performance capture and classification of ECG waveforms across multiple channels.

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A Biomimetic One‐Stone‐Two‐Birds Hydrogel with Electroconductive, Photothermally Antibacterial and Bioadhesive Properties for Skin Tissue Regeneration and Mechanosensation Restoration

Wei,

Jing,

Cheng

et al. 2024

Adv Funct Materials

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Severe skin wounds arising from burns, cancers, and accidents can damage the entire tissue structure, resulting in permanent somatosensory dysfunction in patients. Although emerging hydrogel dressings have shown clinical potential for accelerating wound repair, the use of an individual material to synchronously restore the tissue structure and sensory function of defective skin remains a challenge. Herein, a multifunctional hydrogel that combines electroconductive polydopamine‐capped graphene nanosheets (PrGOs) embedded in a dynamically crosslinked dual‐polysaccharide (xyloglucan and chitosan) matrix network is presented. The fabricated hydrogels have an adjustable modulus that can be matched to skin tissue at the wound site, owing to the dynamic Schiff‐based crosslinking as well as the facile photo‐triggered secondary crosslinking. Furthermore, the photothermal activity of PrGO can elevate the local temperature up to ≈50 °C, significantly restraining bacterial growth. These two factors jointly promote the regeneration of skin tissue. Tissue adhesion of hydrogels is also reported that offers a conformable and robust interface that can detect and quantify human movement and physiological signals to mimic the human skin somatosensory system. This hydrogel offers an effective one‐stone‐for‐two‐birds material that simultaneously achieves tissue regeneration and multi‐signal sensing, promoting the restoration and/or replacement of the structure and function of damaged skins.

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Kirigami‐Structured, Low‐Impedance, and Skin‐Conformal Electronics for Long‐Term Biopotential Monitoring and Human–Machine Interfaces

Cited by 14 publications

References 58 publications

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

On‐Skin Paintable Water‐Resistant Biohydrogel for Wearable Bioelectronics

A Biomimetic One‐Stone‐Two‐Birds Hydrogel with Electroconductive, Photothermally Antibacterial and Bioadhesive Properties for Skin Tissue Regeneration and Mechanosensation Restoration

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