High linearity and low hysteresis LMPs/MXene/AgNWs strain sensor for human motion detection

Applied Physics Letters, Год журнала: 2025, Номер 126(3)

Опубликована: Янв. 20, 2025

Resistive strain sensors show great potential in motion detection, medicine and healthcare, human–machine interaction owing to their ease of fabrication, simple structure, adjustable electrical performance. However, developing high-performance flexible resistive with high sensitivity, linearity, low hysteresis remains a challenge. In this work, we report an LMPs (liquid metal particles)/MXene/AgNWs sensor (LMA sensor) sensitivity (GF = 6.339), linearity (R2 0.982 24), (0.452%). process, AgNWs act as bridge between the MXene nanosheets, change contact area nanosheets under stretching endows sensitivity. The aggregated function structural framework, capitalizing on intrinsic fluidic characteristics serve adhesive silver nanowires (AgNWs) nanosheets. This approach effectively minimizes interstitial spaces MXene. formation Ti-O → Ga3+ coordination bonds has strengthened interfacial interactions. Consequently, demonstrates superior hysteresis. addition, sensitive layer buckled structure is obtained by stretch-release. inhibits inhomogeneous irreversible connection losses material, further improving sensor's mechanical durability. LMA can accurately detect various human activities such breathing expression detection. work will provide avenue for sensors.

Язык: Английский

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Mechanical tough, stretchable, and adhesive PEDOT:PSS-based hydrogel flexible electronics towards multi-modal wearable application

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161645 - 161645

Опубликована: Март 1, 2025

Язык: Английский

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Synergistic Structural Construction of Strain Sensors with Low Baseline Drift and High Sensitivity for Continuous Dynamic Monitoring

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Strain sensors based on conductive elastomers face challenges like baseline drift and noise due to inherent viscoelasticity weak electrode interfaces under dynamic strains. Herein, a synergistic structure with biphasic hierarchical networks stable is proposed address these issues. The sensor employs multilayer polydimethylsiloxane (PDMS) substrate, carbon nanotube-doped PDMS (CNT-PDMS), Ag film. Electrodes are fixed using rigid island reinforced mortise tenon joint formed CNT-PDMS. film dominates resistance during release, significantly reducing drift. Strain-insensitive further reduce noise. This optimized design ensures 99.999% recovery without delay, even at high-speed (800 mm/min) large (80%) exhibits high gauge factor of 55442, low detection limit (0.02%), excellent stability (5000 cycles). With the designed algorithms, single-channel achieves 98.2% decoding accuracy for various gestures, demonstrating great potential wearable electronics.

Язык: Английский

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Toward next-generation wearable sensors based on MXene hydrogels

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(38), С. 25622 - 25642

Опубликована: Янв. 1, 2024

Here in this review, we systematically analyze the design principles of MXene hydrogels for next-generation wearable sensors. Emphasis is placed on multiple sensors based electrical/mechanical enhancement hydrogel network.

Язык: Английский

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Skin-inspired conductive hydrogels with antibacterial and pro-angiogenic abilities customized for accelerating diabetic wound healing

Science China Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Язык: Английский

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High Ion-Conductive Hydrogel: Soft, Elastic, with Wide Humidity Tolerance and Long-Term Stability

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(44), С. 60992 - 61003

Опубликована: Окт. 23, 2024

Ion-conductive hydrogels have received great attention due to their significant potential in flexible electronics. However, achieving that simultaneously possess high ionic conductivity and stability under varying humidity conditions remains a challenge, limiting practical applications. Herein, we propose thermally controlled chemical cross-linking strategy prepare an elastic conductive hydrogel (ECH) of poly(vinyl alcohol) (PVA) with content H2SO4. The covalent cross-links formed effectively tackle the instability issue physically cross-linked PVA/H2SO4 conductivity, which were previously developed via polymer-in-salt strategy. We systematically investigated reaction clarified methods optimize hydroxyl dehydration PVA, resulting excellent mechanical properties ion simultaneously. ECH demonstrates impressive (up 392 ± 49 mS cm–1) elasticity (over 80% resilience upon stretching compression after being equilibrated at various levels for 24 days). Thanks water retention H2SO4 content, maintains exceeding 210 cm–1 over 420 days 50% relative (RH) retains 100 even 3 extremely dry (7% RH). These remarkable make ideal candidate applications requiring reliable diverse environmental conditions. Additionally, demonstrated can function as stretchable Joule heater conformability heating up objects curved surfaces. rate could reach fast ∼12 °C s–1 when human-safe alternating current voltage is below 36 V, attributed conductivity. believe performance ease fabrication our promising use electrolytes energy storage devices, electrolyte gates electrochemical transistors, artificial skin, often face long-term challenges

Язык: Английский

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Lignin sulfonate induced ultrafast fabrication of polypyrrole-based conductive organohydrogel for high performance flexible strain and temperature sensor

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 282, С. 136969 - 136969

Опубликована: Окт. 28, 2024

Язык: Английский

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Enhanced multifunctional sensing in human motion with speed-controlled coaxial wet-spun hollow MWCNT-TPU/TPU smart fibers

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155045 - 155045

Опубликована: Авг. 23, 2024

Язык: Английский

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Physicochemical Dual Cross-Linked Multifunctional Conductive Organohydrogel Sensors for Fireworks Burn Wound Healing and Intelligent Real-Time Monitoring

Polymer science & technology., Год журнала: 2024, Номер unknown

Опубликована: Дек. 12, 2024

Conductive hydrogels have garnered significant attention in the realm of future flexible electronic devices due to their properties such as flexibility, electrical conductivity, frost resistance, and biocompatibility. However, integration numerous functional applications biomedical field still presents notable challenges. In this research, a rigid hard-structured network was formed by cross-linking gallic acid grafted chitosan (CS–GA) tannic (TA) with poly(vinyl alcohol) (PVA) through physical freezing. The noncovalent hydrogen bonding during freezing thawing process facilitated formation microcrystalline domains amorphous hydrogel system. Functional proteins from eggshell membrane were cross-linked tetra-armed poly(ethylene glycol) maleimide (4am-PEG-MAL) via thiol-olefin click chemistry, lysozyme incorporated into an antibacterial component nucleophilic substitution reaction. These chemical methods resulted soft-structured that enhanced mechanical (maximum stress 2.15 MPa elongation 605%). use ionic liquids/ethylene glycol/water (ILs/EG/H2O) ternary solvents instead single solvent not only provided resistance but also imparted excellent conductivity (0.37 ± 0.04 S/m). Notably, organohydrogel showed good antimicrobial biocompatibility effective providing emergency cooling after fireworks burns promoting wet healing broken skin minimize scarring. field, multifunctional can serve wearable device monitor movement amplitude wounds real-time, offering novel approach deep learning-assisted wound healing. nature biological promising applications.

Язык: Английский

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Mechanical Design Principles of Conductive Gels Applied for Flexible Electronics

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 21, 2024

Abstract Reaping the benefits of burgeoning investigation gels in recent decades, flexible electronics based on conductive have been extensively explored. Gels consisting polymer networks and solvents provide ideal platforms for fabricating due to their soft mechanical nature, excellent biocompatibility, water‐like environment, ease processing. The majority investigations primarily focus functionalities such as sensing capability, energy density, luminance, fluctuating frequency, so on, whereas distinguishing feature lies its inherent deformable mechanics comparison metal‐ or semiconductor‐based stiff electronics. However, comprehensive design properties not received sufficient attention improve overall performance A summary is provided, listing six crucial parameters—stretchability, modulus, strength, elasticity, hysteresis, fatigue—which exert significant influence This review aims direct researchers’ toward presents representative strategies modulation.

Язык: Английский

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