Muscle‐Inspired MXene Conductive Hydrogels with Anisotropy and Low‐Temperature Tolerance for Wearable Flexible Sensors and Arrays

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(46)

Published: Aug. 16, 2021

Abstract Conductive hydrogels as flexible electronic devices, not only have unique attractions but also meet the basic need of mechanical flexibility and intelligent sensing. How to endow anisotropy a wide application temperature range for traditional homogeneous conductive sensors is still challenge. Herein, directional freezing method used prepare anisotropic MXene that are inspired by ordered structures muscles. Due hydrogels, properties electrical conductivity enhanced in specific directions. The resistance −36 25 °C through solvent substitution. Thus, muscle‐inspired with low‐temperature can be wearable sensors. sensing signals further displayed on mobile phone images wireless technology, will change collected achieve motion detection. Multiple assembled into 3D sensor array detecting magnitude spatial distribution forces or strains. orientation promising sensors, which broad prospects human–machine interface compatibility medical monitoring.

Language: Английский

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Biomedical applications of gelatin methacryloyl hydrogels

Engineered Regeneration, Journal Year: 2021, Volume and Issue: 2, P. 47 - 56

Published: Jan. 1, 2021

Gelatin methacryloyl (GelMA) has attracted the widespread interest of researchers because its excellent biocompatibility, biodegradability, and moldability. Various structures have been constructed from GelMA hydrogel, including 3D scaffold, injectable gel, bio-printed electrospun fibrous membrane via precise fabrication methods such as light-induced crosslinking, extrusion printing, electrospinning, or microfluidics. Due to unique characteristics simple preparation, hydrogel demonstrates superior performance promising potential in a broad range biomedical applications involving wound healing, drug delivery, biosensing, tissue regeneration. This review integrates sufficient research works on hydrogels regeneration tissues skin, tendon, bone, cartilage, blood vessel, cardiovascular system, addition organ-on-a-chip, providing critical present work offering future implications.

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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A Biodegradable and Recyclable Piezoelectric Sensor Based on a Molecular Ferroelectric Embedded in a Bacterial Cellulose Hydrogel

ACS Nano, Journal Year: 2022, Volume and Issue: 16(3), P. 3744 - 3755

Published: March 2, 2022

Currently, various electronic devices make our life more and safe, healthy, comfortable, but at the same time, they produce a large amount of nondegradable nonrecyclable waste that threatens environment. In this work, we explore an environmentally friendly flexible mechanical sensor is biodegradable recyclable. The consists bacterial cellulose (BC) hydrogel as matrix imidazolium perchlorate (ImClO4) molecular ferroelectric functional element, hybrid which possesses high sensitivity 4 mV kPa-1 wide operational range from 0.2 to 31.25 kPa, outperforming those most based on conventional biomaterials. Moreover, BC can be fully degraded into glucose oligosaccharides, while ImClO4 recyclable reused for devices, leaving no hazardous waste.

Language: Английский

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Embedment of sensing elements for robust, highly sensitive, and cross-talk–free iontronic skins for robotics applications

Science Advances, Journal Year: 2023, Volume and Issue: 9(9)

Published: March 3, 2023

Iontronic pressure sensors are promising in robot haptics because they can achieve high sensing performance using nanoscale electric double layers (EDLs) for capacitive signal output. However, it is challenging to both sensitivity and mechanical stability these devices. need microstructures that offer subtly changeable EDL interfaces boost sensitivity, while the microstructured mechanically weak. Here, we embed isolated ionic gel (IMIG) a hole array (28 × 28) of elastomeric matrix cross-link IMIGs laterally enhanced interfacial robustness without sacrificing sensitivity. The embedded configuration toughens strengthens skin by pinning cracks elastic dissipation interhole structures. Furthermore, cross-talk between elements suppressed isolating materials designing circuit with compensation algorithm. We have demonstrated potentially useful robotic manipulation tasks object recognition.

Language: Английский

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The Food–Materials Nexus: Next Generation Bioplastics and Advanced Materials from Agri‐Food Residues

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(43)

Published: Sept. 12, 2021

The most recent strategies available for upcycling agri-food losses and waste (FLW) into functional bioplastics advanced materials are reviewed the valorization of food residuals put in perspective, adding to water-food-energy nexus. Low value or underutilized biomass, biocolloids, water-soluble biopolymers, polymerizable monomers, nutrients introduced as feasible building blocks biotechnological conversion bioplastics. latter demonstrated their incorporation multifunctional packaging, biomedical devices, sensors, actuators, energy storage contributing efforts within future circular bioeconomy. Strategies effectively synthesize, deconstruct reassemble engineer FLW-derived monomeric, polymeric, colloidal blocks. Multifunctional considering structural, chemical, physical well accessibility FLW precursors. Processing techniques analyzed fields polymer chemistry physics. prospects streams biomass surplus, availability, interactions with water thermal stability, critically discussed a near-future scenario that is expected lead next-generation materials.

Language: Английский

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Cellulose: a fascinating biopolymer for hydrogel synthesis

Journal of Materials Chemistry B, Journal Year: 2022, Volume and Issue: 10(12), P. 1923 - 1945

Published: Jan. 1, 2022

Cellulose is the most abundant natural biopolymer and considered an unlimited source of raw materials to develop sustainable, non-toxic, environmentally friendly products that are in ever-increasing demand for various applications.

Language: Английский

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Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

ACS Nano, Journal Year: 2022, Volume and Issue: 16(4), P. 6687 - 6699

Published: April 6, 2022

The human–machine interface (HMI) previously relied on a single perception that cannot realize three-dimensional (3D) interaction and convenient accurate in multiple scenes. Here, we propose collaborative including electrooculography (EOG) tactile for fast 3D interaction. EOG signals are mainly used fast, convenient, contactless 2D (XY-axis) interaction, the sensing is utilized complex movement control Z-axis honeycomb graphene electrodes signal acquisition array prepared by laser-induced process. Two pairs of ultrathin breathable attached around eyes monitoring nine different eye movements. A machine learning algorithm designed to train classify movements with an average prediction accuracy 92.6%. Furthermore, (90 μm), stretchable (∼1000%), flexible assembled pair 4 × planar electrode arrays arm which can single-point, multipoint sliding touch functions. Consequently, achieve eight directions even more trajectory control. Meanwhile, sensor exhibits ultrahigh sensitivity 1.428 kPa–1 pressure range 0–300 Pa long-term response stability repeatability. Therefore, collaboration between will play important role rapid

Language: Английский

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A conductive hydrogel based on nature polymer agar with self-healing ability and stretchability for flexible sensors

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 139843 - 139843

Published: Oct. 27, 2022

Language: Английский

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Self‐Healing Hydrogel Bioelectronics

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(21)

Published: Nov. 22, 2023

Abstract Hydrogels have emerged as powerful building blocks to develop various soft bioelectronics because of their tissue‐like mechanical properties, superior bio‐compatibility, the ability conduct both electrons and ions, multiple stimuli‐responsiveness. However, hydrogels are vulnerable damage, which limits usage in developing durable hydrogel‐based bioelectronics. Self‐healing aim endow with property repairing specific functions after failure, thus improving durability, reliability, longevity. This review discusses recent advances self‐healing hydrogels, from mechanisms, material chemistry, strategies for properties improvement hydrogel materials, design, fabrication, applications bioelectronics, including wearable physical biochemical sensors, supercapacitors, flexible display devices, triboelectric nanogenerators (TENGs), implantable etc. Furthermore, persisting challenges hampering development prospects proposed. is expected expedite research

Language: Английский

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