Carbonized Silk Fabric for Ultrastretchable, Highly Sensitive, and Wearable Strain Sensors

Advanced Materials, Journal Year: 2016, Volume and Issue: 28(31), P. 6640 - 6648

Published: May 11, 2016

A carbonized plain-weave silk fabric is fabricated into wearable and robust strain sensors, which can be stretched up to 500% show high sensitivity in a wide range. This sensor assembled devices for detection of both large subtle human activities, showing great potential monitoring motions personal health.

Language: Английский

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Recent advances in wearable tactile sensors: Materials, sensing mechanisms, and device performance

Materials Science and Engineering R Reports, Journal Year: 2017, Volume and Issue: 115, P. 1 - 37

Published: March 6, 2017

Language: Английский

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Carbonized Silk Nanofiber Membrane for Transparent and Sensitive Electronic Skin

Advanced Functional Materials, Journal Year: 2017, Volume and Issue: 27(9)

Published: Jan. 19, 2017

Recent years have witnessed the explosive development of electronic skin. Highly sensitive pressure sensing is one primary abilities To date, most reported skin‐like sensors are based on nanomaterials and microstructured polydimethylsiloxane (PDMS) films, limiting their wide practical applications due to unknown biotoxicity redundant fabrication procedure. A cost‐effective, large‐area‐capable, biocompatible approach for high‐performance highly desired. Silk fibroin (SF) a natural protein that has recently drawn great attention its application as substrate flexible electronics. Here, demonstrated using SF‐derived active materials. Flexible conformal can be fabricated transparent carbonized silk nanofiber membranes (CSilkNM) unstructured PDMS films through cost‐effective large‐scale capable approach. Due unique N‐doped carbon network structure CSilkNM, obtained sensor shows superior performance, including ultrahigh sensitivity (34.47 kPa −1 ) broad range, an ultralow detection limit (0.8 Pa), rapid response time (<16.7 ms), high durability (>10 000 cycles). Based in monitoring human physiological signals, subtle touch, detecting spatial distribution demonstrated.

Language: Английский

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Stretchable and tough conductive hydrogels for flexible pressure and strain sensors

Journal of Materials Chemistry B, Journal Year: 2020, Volume and Issue: 8(16), P. 3437 - 3459

Published: Jan. 1, 2020

Flexible pressure and strain sensors have great potential for applications in wearable implantable devices, soft robotics artificial skin. Compared to flexible based on filler/elastomer composites, conductive hydrogels are advantageous due their biomimetic structures properties, as well biocompatibility. Numerous chemical structural designs provide unlimited opportunities tune the properties performance of match various demands practical applications. Many electronically ionically been developed fabricate with different configurations, including resistance type capacitance type. The sensitivity, reliability stability hydrogel dependent network mechanical properties. This review focuses tough sensors. Representative strategies prepare stretchable, strong, self-healing briefly reviewed since these illuminating development hydrogels. Then, a general account is presented discussed. Recent advances designed sensory discussed detail. A series application devices reviewed. Some perspectives at end.

Language: Английский

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3D Printed Photoresponsive Devices Based on Shape Memory Composites

Advanced Materials, Journal Year: 2017, Volume and Issue: 29(33)

Published: June 29, 2017

Compared with traditional stimuli-responsive devices simple planar or tubular geometries, 3D printed not only intimately meet the requirement of complicated shapes at macrolevel but also satisfy various conformation changes triggered by external stimuli microscopic scale. However, their development is limited lack printing functional materials. This paper demonstrates photoresponsive shape memory through combining fused deposition modeling technology and composites based on polymers carbon black high photothermal conversion efficiency. External illumination triggers recovery from temporary to original shape. The effect materials thickness light density behavior quantified calculated. Remarkably, sunlight these devices. facile strategy would provide tremendous opportunities for design fabrication biomimetic smart soft robotics.

Language: Английский

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All-fiber hybrid piezoelectric-enhanced triboelectric nanogenerator for wearable gesture monitoring

Nano Energy, Journal Year: 2018, Volume and Issue: 48, P. 152 - 160

Published: March 18, 2018

Language: Английский

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Organic crystalline materials in flexible electronics

Chemical Society Reviews, Journal Year: 2018, Volume and Issue: 48(6), P. 1492 - 1530

Published: Oct. 4, 2018

Flexible electronics have attracted considerable attention recently given their potential to revolutionize human lives. High-performance organic crystalline materials (OCMs) are considered strong candidates for next-generation flexible such as displays, image sensors, and artificial skin. They not only great advantages in terms of flexibility, molecular diversity, low-cost, solution processability, inherent compatibility with substrates, but also show less grain boundaries minimal defects, ensuring excellent uniform electronic characteristics. Meanwhile, OCMs serve a powerful tool probe the intrinsic mechanical properties organics reveal device physics further guidance design. While past decades witnessed huge advances OCM-based electronics, this review is intended provide timely overview fascinating field. First, crystal packing, charge transport, assembly protocols introduced. State-of-the-art construction strategies aligned/patterned OCM on/into substrates then discussed detail. Following this, advanced devices applications highlighted. Finally, future directions opportunities field proposed, hope providing research.

Language: Английский

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New insights and perspectives into biological materials for flexible electronics

Chemical Society Reviews, Journal Year: 2017, Volume and Issue: 46(22), P. 6764 - 6815

Published: Jan. 1, 2017

Biological materials have robust hierarchical structures capable of specialized functions and the incorporation natural biologically active components, which been finely tuned through millions years evolution. These highly efficient architectural designs afford remarkable transport mechanical properties, render them attractive candidates for flexible electronic sensing technologies. This review provides a comprehensive overview fundamental aspects applications biological devices discusses various classes by describing their unique functions. We discuss effect activity on improved properties in detail, because this overcomes limited bioavailability restricted morphology generally encountered traditional devices. also summarize approaches design functionalization use biomedical, electron, energy, environmental optical fields. Finally, we provide new insights perspectives to further describe trends future generations materials, are likely be critical components (building blocks or elements) electronics.

Language: Английский

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Bioinspired Interlocked Structure-Induced High Deformability for Two-Dimensional Titanium Carbide (MXene)/Natural Microcapsule-Based Flexible Pressure Sensors

ACS Nano, Journal Year: 2019, Volume and Issue: 13(8), P. 9139 - 9147

Published: July 22, 2019

Achieving high deformability in response to minimal external stimulation while maximizing human–machine interactions is a considerable challenge for wearable and flexible electronics applications. Various natural materials or living organisms consisting of hierarchical interlocked structures exhibit combinations properties (e.g., elasticity flexibility) that do not occur conventional materials. The epidermal–dermal microbridges human skin have excellent elastic moduli, which enhance amplify received tactile signal transport. Herein, we use the sensing mechanisms inspired by develop Ti3C2/natural microcapsule biocomposite films are robust deformable mimicking micro/nanoscale structure skin—such as hierarchy, interlocking, patterning. can be used create with moduli (0.73 MPa), capable various stimuli, verified employing theoretical studies. sensor (24.63 kPa–1) achieves 9.4-fold increase pressure sensitivity compared planar structured Ti3C2-based (2.61 kPa–1). This device also exhibits rapid rate (14 ms) good cycling reproducibility stability (5000 times). In addition, detect discriminate signals ranging from finger motion pulses voice recognition.

Language: Английский

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Flexible, Stretchable Sensors for Wearable Health Monitoring: Sensing Mechanisms, Materials, Fabrication Strategies and Features

Sensors, Journal Year: 2018, Volume and Issue: 18(2), P. 645 - 645

Published: Feb. 22, 2018

Wearable health monitoring systems have gained considerable interest in recent years owing to their tremendous promise for personal portable watching and remote medical practices. The sensors with excellent flexibility stretchability are crucial components that can provide the capability of continuously tracking physiological signals human body without conspicuous uncomfortableness invasiveness. acquired by these sensors, such as motion, heart rate, breath, skin temperature metabolism parameter, closely associated conditions. This review attempts summarize progress flexible stretchable concerning detected indicators, sensing mechanisms, functional materials, fabrication strategies, basic desired features. potential challenges future perspectives wearable system also briefly discussed.

Language: Английский

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