Ultra‐Stretchable and Fast Self‐Healing Ionic Hydrogel in Cryogenic Environments for Artificial Nerve Fiber

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(16)

Published: Feb. 1, 2022

Self-healing materials behave with irreplaceable advantages in biomimetic intelligent robots (BIR) for avoiding or reducing safety hazards and economic losses from accidental damage during service. However, the self-healing ability is unreservedly lost even becomes rigid fragile cryogenic environment where BIR are precisely needed. Here, authors report a versatile ionic hydrogel fast ability, ultra-stretchability, stable conductivity, at -80 °C. The systematically optimized to improve hydrogen-bonded network nanostructure, coordinated achieving quick within 10 min, large deformation tolerance of over 7000%, superior conductivity 11.76 S cm-1 anti-freezing which difficult obtain simultaneously. Such provides new opportunities artificial electronic devices harsh environments. As prospective application, they fabricate an nerve fiber by mimicking structure functions myelinated axon, exhibiting property potential-gated signal transmission. This integrated into robot demonstrating real-time high fidelity throughput information interaction under big temperature. bionic device will bring pioneering open broad application scenario extreme conditions.

Language: Английский

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Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(40)

Published: July 11, 2021

Abstract Electronic skin (e‐skin) is driving significant advances in flexible electronics as it holds great promise health monitoring, human–machine interfaces, soft robotics, and so on. Flexible sensors that can detect various stimuli or have multiple properties play an indispensable role e‐skin. Despite tremendous research efforts devoted to with excellent performance regarding a certain sensing mode property, emerging e‐skin demands multifunctional be endowed the skin‐like capability beyond. Considering outstanding superiorities of electrical conductivity, chemical stability, ease functionalization, carbon materials are adopted implement sensors. In this review, latest carbon‐based regard types detection modes abundant introduced. The corresponding preparation process, device structure, mechanism, obtained performance, intriguing applications highlighted. Furthermore, diverse systems by integrating current cutting‐edge technologies (e.g., data acquisition transmission, neuromorphic technology, artificial intelligence) systematically investigated detail. Finally, existing problems future developing directions also proposed.

Language: Английский

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Naturally sourced hydrogels: emerging fundamental materials for next-generation healthcare sensing

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(9), P. 2992 - 3034

Published: Jan. 1, 2023

The flourishing development of flexible healthcare sensing systems is inseparable from the fundamental materials with application-oriented mechanical and electrical properties. Thanks to continuous inspiration our Mother Nature, hydrogels originating natural biomass are attracting growing attention for their structural functional designs owing unique chemical, physical biological These highly efficient architectural enable them be most promising candidates electronic devices. This comprehensive review focuses on recent advances in naturally sourced constructing multi-functional sensors applications thereof. We first briefly introduce representative polymers, including polysaccharides, proteins, polypeptides, summarize physicochemical design principles fabrication strategies hydrogel based these polymers outlined after material properties required presented. then highlight various techniques devices, illustrate examples wearable or implantable bioelectronics pressure, strain, temperature, biomarker field systems. Finally, concluding remarks challenges prospects hydrogel-based provided. hope that this will provide valuable information next-generation build a bridge between as matter an applied target accelerate new near future.

Language: Английский

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Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(17)

Published: Jan. 15, 2022

Abstract Over the past few decades, flexible sensors have been developed from “electronic” level to “iontronic” level, and gradually “ionic” level. Ionic (IFS) are one kind of advanced that based on concept ion migration. Compared conventional electronic sensors, IFS can not only replicate topological structures human skin, but also capable achieving tactile perception functions similar which provide effective tools methods for narrowing gap between electronics biological interfaces. In this review, latest research developments several typical sensing mechanisms, compositions, structural design, applications comprehensively reviewed. Particularly, development novel ionic materials, designs, biomimetic approaches has resulted in a wide range exciting IFS, effectively sense pressure, strain, humidity with high sensitivity reliability, exhibit self‐powered, self‐healing, biodegradability, other properties skin. Furthermore, artificial human‐interactive technologies, wearable health monitors, related fields Finally, perspectives current challenges future directions presented.

Language: Английский

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Highly adhesive and self-healing γ-PGA/PEDOT:PSS conductive hydrogels enabled by multiple hydrogen bonding for wearable electronics

Nano Energy, Journal Year: 2022, Volume and Issue: 95, P. 106991 - 106991

Published: Jan. 29, 2022

Language: Английский

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Adaptive Ionogel Paint from Room‐Temperature Autonomous Polymerization of α‐Thioctic Acid for Stretchable and Healable Electronics

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(24)

Published: April 8, 2021

Abstract Development of a universal stretchable ionic conductor coating on insulating substrates, irrespective surface chemistry and substrate shapes, is immense interest for compliant integrative large‐area electronics but has proved to be extremely challenging. Existing methods relying either the concurrent deposition polymerizing precursors or divided formulation painting processes both suffer from several limitations in terms adhesion, dehydration, processability, pre‐treatment. Here an ionogel paint that readily prepared concentration‐induced autonomous ring‐opening polymerization natural small molecule—α‐thioctic acid (TA) at ambient conditions reported. The presence liquid prevents polyTA further depolymerization via forming COOH···OS hydrogen bonds, resulting ultra‐stretchable ionogels with widely tunable mechanical conductive properties, self‐healability, as well tissue‐like strain adaptability. Moreover, owing its adhesion adjustable rheology, can directly coated diverse substrates arbitrary shapes (including porous materials, 3D printed frames, elastic threads) render them conductivity. Applications ionogel‐coated skin‐like highly sensitive durable large‐strain sensors are demonstrated, suggesting paint's great potential emerging soft electronics.

Language: Английский

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Ultrafast Fabrication of Lignin-Encapsulated Silica Nanoparticles Reinforced Conductive Hydrogels with High Elasticity and Self-Adhesion for Strain Sensors

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(11), P. 5258 - 5272

Published: June 2, 2022

Conductive hydrogels are receiving considerable attention because of their important applications, such as flexible wearable electronic, human-machine interfaces, and smart/soft robotics. However, the insufficient mechanical performance inferior adhesive capability severely hinder potential applications in an emerging field. Herein, a highly elastic conductive hydrogel that integrated robustness, self-adhesiveness, UV-filtering, stable electrical was achieved by synergistic effect sulfonated lignin-coated silica nanoparticles (LSNs), polyacrylamide (PAM) chains, ferric ions (Fe3+). In detail, dynamic redox reaction constructed between catechol groups LSNs Fe3+, which could promote rapid gelation acrylamide (AM) monomers 60 s. The optimized containing 1.5 wt % junction points exhibited excellent elasticity (<15% hysteresis ratio), high stretchability (∼1100% elongation), improved robustness (tensile compressive strength ∼180 kPa ∼480 kPa). Notably, abundant endowed with long-lasting robust self-adhesion, enabling seamless adhesion to human skin. Meanwhile, also provided exceptional UV-blocking (∼95.1%) for hydrogels. combined advantages were manifested sensors high-fidelity detection various deformations over wide range strain (10–200%) good repeatability stability. We believed designed may become promising candidate material future electronics long-term movements monitoring.

Language: Английский

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Recent progress in human body energy harvesting for smart bioelectronic system

Fundamental Research, Journal Year: 2021, Volume and Issue: 1(3), P. 364 - 382

Published: May 1, 2021

From every heartbeat to footstep, human beings dissipate energy all the time. Researchers are trying harvest from body and convert it into electricity, which can be supplied electronic medical devices closely related health. Such an recycling form is currently a research hotspot in fields of harvesting bioelectronics. This review firstly summarizes distribution characteristics three primary sources contained body, including thermal energy, chemical mechanical energy. Afterwards, applicable technologies corresponding working mechanisms for different introduced. Some typical demos practical applications each type technology also presented. Specifically, advantages critical issues summarized, promising solutions provided. Besides, interaction strategies between various summarized aspects wearable implantable applications. Finally, concept self-powered closed-loop bioelectronic system (SCBS) put forward first time, organically combines portable devices, body. The prospect symbiosis SCBS demands future development trends discussed.

Language: Английский

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Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(43), P. 48907 - 48916

Published: Oct. 25, 2022

Recently, wearable sensors and electronic skin systems have become prevalent, which can be employed to detect the movement status physiological signals of wearers. Here, a pressure sensor composed mesh-like micro-convex structure polydimethylsiloxane (PDMS), MXene nanosheet/Ag nanoflower (AgNF) films, flexible interdigital electrodes was designed by layer-by-layer (LBL) assembly. The unique microstructure PDMS effectively increases contact area improves sensitivity. Moreover, AgNFs were introduced into as "bridge," synergistic effect two further enhanced performance sensor. has high sensitivity (191.3 kPa-1), good stability (18,000 cycles), fast response/recovery time (80 ms/90 ms), low detection limit (8 Pa), so it used for all-round monitoring human body. Sensing arrays integrated with wireless transmitter an intelligent artificial spatial mapping human-computer interaction sensing. we develop smart glove simple method, combining 3D model accurate hand poses. This provides ideas somatosensory technology, leading health monitoring, rehabilitation training, personalized medicine.

Language: Английский

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Molecularly Engineered Zwitterionic Hydrogels with High Toughness and Self-Healing Capacity for Soft Electronics Applications

Chemistry of Materials, Journal Year: 2021, Volume and Issue: 33(21), P. 8418 - 8429

Published: Oct. 19, 2021

Zwitterionic hydrogels have attracted tremendous interest due to their densely charged network, ultralow fouling characteristics, and excellent biocompatibility. However, the unsatisfactory mechanical performance of zwitterionic gels limits practical applications. Here, we developed a new class from structurally ameliorated sulfobetaine monomer, 3-(1-(4-vinylbenzyl)-1H-imidazol-3-ium-3-yl)propane-1-sulfonate (VBIPS). The incorporated benzene imidazole greatly enhance tensile toughness fracture gel, which are 40 60 times higher than those conventional hydrogel, respectively. An obvious crack blunting occurs during extension. In situ microscopic observation reveals that outstanding originates formation two-phase structure at room temperature, with an contrast association energy. properties gel can be well-tuned by changing pH, self-healing is achieved acid treatment. VBIPS also possesses short-term antifouling attached bacteria in longer timescale easily released via salt To expand application potentials, ionogel prepared soaking ionic liquids, flexible, antifreezing, used as strain sensor. This work provides molecular strategy toughen hydrogels, should broaden applications diverse fields.

Language: Английский

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