Published: Jan. 1, 2024
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)
Published: April 1, 2024
Abstract To achieve accurate monitoring of bioelectrical signals, it is essential to use customizable bioelectrodes that can self‐adapt the skin's surface topography. Ion‐conducting hydrogel has received significant attention in this field due its softness, adhesion, and skin‐like mechanical properties. However, these currently suffer from degradation electrical conductivity, skin‐compliance when exposed aqueous environments. This significantly limits application bioelectrodes. Herein, a biohydrogel be applied on skin or fabric by solvent volatilization for liquid ink‐gel film conversion reported. The biohydrogel's distinct characteristic transitioning between phase establishes superb conformal contact dynamic compliance with epidermis. effectively eliminates motion artifacts results lower impedance noise both static states compared existing cotton create electrocardiogram (ECG) garments. These garments enable acquisition ECG signals high accuracy environment over 72 h. Besides, biohydrogel‐based outperform commercial gel electrodes 83.5% signal‐to‐noise ratio. Additionally, cotton/biohydrogel electrode facilitates multi‐channel, high‐fidelity recording enabling high‐performance capture classification waveforms across multiple channels.
Language: Английский
Citations
21
Advanced Science, Journal Year: 2023, Volume and Issue: 11(1)
Published: Nov. 20, 2023
Abstract Epidermal dry electrodes with high skin‐compliant stretchability, low bioelectric interfacial impedance, and long‐term reliability are crucial for biopotential signal recording human–machine interaction. However, incorporating these essential characteristics into remains a challenge. Here, skin‐conformal electrode is developed by encapsulating kirigami‐structured poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/polyvinyl alcohol (PVA)/silver nanowires (Ag NWs) film ultrathin polyurethane (PU) tape. This Kirigami‐structured PEDOT:PSS/PVA/Ag NWs/PU epidermal exhibits sheet resistance (≈3.9 Ω sq −1 ), large stretchability (>100%), impedance (≈27.41 kΩ at 100 Hz ≈59.76 10 Hz), sufficient mechanoelectrical stability. enhanced performance attributed to the synergistic effects of ionic/electronic current from PEDOT:PSS/Ag NWs dual conductive network, Kirigami structure, unique encapsulation. Compared existing or standard gel electrodes, as‐prepared possess lower noise in various conditions (e.g., sweat, wet, movement), indicating superior water/motion‐interference resistance. Moreover, they can acquire high‐quality signals even after water rinsing ultrasonic cleaning. These outstanding advantages enable effectively monitor human motions real‐time record signals, such as electrocardiogram, electromyogram, electrooculogram under conditions, control external electronics, thereby facilitating interactions.
Language: Английский
Citations
24
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(48)
Published: Oct. 8, 2024
Abstract The advancement of soft bioelectronics hinges critically on the electromechanical properties hydrogels. Despite ongoing research into diverse material and structural strategies to enhance these properties, producing hydrogels that are simultaneously tough, resilient, highly conductive for long‐term, dynamic physiological monitoring remains a formidable challenge. Here, strategy utilizing scalable layered heterogeneous hydrogel fibers (LHHFs) is introduced enables synergistic modulation High toughness (1.4 MJ m −3 ) resilience (over 92% recovery from 200% strain) LHHFs achieved through damage‐free toughening mechanism involves dense long‐chain entanglements reversible strain‐induced crystallization sodium polyacrylate. unique symmetrical structure LHHFs, featuring distinct electrical mechanical functional layers, facilitates mixing multi‐walled carbon nanotubes significantly conductivity (192.7 S −1 without compromising resilience. Furthermore, high‐performance LHHF capacitive iontronic strain/pressure sensors epidermal electrodes developed, capable accurately stably capturing biomechanical bioelectrical signals human body under conditions. offers promising route developing with uniquely integrated attributes, advancing practical wearable healthcare applications.
Language: Английский
Citations
11
Science Advances, Journal Year: 2024, Volume and Issue: 10(51)
Published: Dec. 20, 2024
Tissue imaging is usually captured by hospital-based nuclear magnetic resonance. Here, we present a wearable triboelectric impedance tomography (TIT) system for noninvasive of various biological tissues. The mechanism relies on the obtained information from different soft human A high-precision signal source designed basis composite nanogenerator, which exhibits minimal total harmonic distortion 0.03% and peak output signal-to-noise ratio up to 120 decibels. current density injected into skin around 79.58 milliamperes per square meter, far below safety threshold medical devices. TIT achieves time-resolved limbs’ tissues, many appealing functions can be realized using this system, including observation muscle movement, motion intention recognition, identification pathological changes tissue. Hence, with excellent biocompatibility integrated devices, such as medical-assistive exoskeletons smart protective suit.
Language: Английский
Citations
8
Interdisciplinary materials, Journal Year: 2024, Volume and Issue: 3(5), P. 775 - 790
Published: June 16, 2024
Abstract Long‐term biopotential monitoring requires high‐performance biocompatible wearable dry electrodes. But currently, it is challenging to establish a form‐preserving fit with the skin, resulting in high interface impedance and motion artifacts. This research aims present an innovative solution using all‐green organic electrode that eliminates aforementioned challenges. The prepared by introducing maltitol into chosen conductive polymer, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate). Thanks secondary doping plasticizer effect of maltitol, exhibits good stretchability (62%), strong self‐adhesion (0.46 N/cm), conductivity (102 S/cm), low Young's modulus (7 MPa). It can always form conformal contact skin even during body movements. Together electrical properties, enables lower compared current standard Ag/AgCl gel electrode. Consequently, application this bioelectrical signal measurement (electromyography, electrocardiography, electroencephalography) long‐term was successfully demonstrated.
Language: Английский
Citations
7
Matter, Journal Year: 2024, Volume and Issue: 7(9), P. 2859 - 2895
Published: Sept. 1, 2024
Language: Английский
Citations
5
Advanced Nanocomposites, Journal Year: 2024, Volume and Issue: 1(1), P. 275 - 289
Published: Jan. 1, 2024
Recent advancements in flexible and stretchable electronics have underscored the critical importance of maintaining essential electrical properties under stretching conditions, especially wearable technology. The integration conductors into devices, such as soft sensors batteries, highlights efforts to enhance durability performance. Despite extensive studies development conductors, impedance characteristics electrodes largely evaded in-depth examination within existing literature. This review paper aims bridge this gap by offering a comprehensive overview recent both material structural designs tailored for property electrodes. It delves exploration various conductive materials, including metals, liquid conducting polymers, hydrogels, textiles, each unique suited specific applications. Moreover, it discusses diverse fabrication methods employed, direct mixing, surface coating/deposition, printing, specialized techniques creating electrically networks. Beyond strategies, also explores innovative concepts capable accommodating large deformations, serpentine, coiled, Kirigami, open-mesh structures. These not only mechanical resilience but contribute their performance, particularly low electronic Finally, provides insights emerging applications nanocomposites with electronics, addressing key challenges discussing future research directions.
Language: Английский
Citations
4
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159190 - 159190
Published: Jan. 1, 2025
Language: Английский
Citations
0
Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 30, 2025
Abstract Flexible wearable electronic devices, capable of real‐time physiological monitoring for personalized health management, are increasingly recognized their convenience, comfort, and customization potential. Despite advancements, challenges persist soft electrodes due to the skin's complex surface, biocompatibility demands, modulus mismatch. In response, a mussel‐inspired polydopamine‐nanoclay‐silk fibroin hydrogel (DA‐C‐SFH) is introduced, synthesized via two‐step process. The initial polydopamine oxidation introduces free catechol groups through polydopamine‐incorporated nanoclay, followed by integration with silk fibroin, refining network at mesoscopic scale. This DA‐C‐SFH exhibits low modulus, high elasticity, adhesive properties, biocompatibility, enabling conformal skin adhesion. It effectively detects subtle signals, such as pulse waves, serves epidermal electrode, recording various electrophysiological including electrocardiograms electromyograms, thus underscoring its potential in medical electronics applications.
Language: Английский
Citations
0
ACS Sensors, Journal Year: 2025, Volume and Issue: unknown
Published: April 9, 2025
Capturing the electrooculography (EOG) signals is very attractive for assistive devices and user interfaces virtual reality (VR) systems. However, current EOG acquisition systems face challenges in ensuring comfort, particularly terms of electrode electrical mechanical performance, long-term usability, thermal effects, overall system portability. This study presents polymeric dry flexible electrodes, composed a composite poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), poly(vinyl alcohol) (PVA), Gallic acid (GA), D-sorbitol, forming dynamic cross-linked network that ensures strong adhesion, stretchability, stability. These electrodes maintain their performance up to 72 h, can be restored through heat reactivation if degrades after prolonged storage. exhibits excellent biocompatibility, causing no skin irritation or effects with continuous use. We have also developed circuit real-time signal processing wireless transmission, which operates coordination electrodes. The employs convolutional neural (CNN) achieve 97.1% accuracy classifying various eye movement patterns. enables contactless control digital simple movements, offering solution long-term, comfortable, high-fidelity EOG-based human-machine interfaces, VR integration technologies individuals disabilities.
Language: Английский
Citations
0