Electronic Skin: Recent Progress and Future Prospects for Skin‐Attachable Devices for Health Monitoring, Robotics, and Prosthetics

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(48)

Published: Sept. 19, 2019

Abstract Recent progress in electronic skin or e‐skin research is broadly reviewed, focusing on technologies needed three main applications: skin‐attachable electronics, robotics, and prosthetics. First, since will be exposed to prolonged stresses of various kinds needs conformally adhered irregularly shaped surfaces, materials with intrinsic stretchability self‐healing properties are great importance. Second, tactile sensing capability such as the detection pressure, strain, slip, force vector, temperature important for health monitoring attachable devices, enable object manipulation surrounding environment robotics For chemical electrophysiological wireless signal communication high significance fully gauge state users ensure user comfort. prosthetics, large‐area integration 3D surfaces a facile scalable manner critical. Furthermore, new processing strategies using neuromorphic devices efficiently process information parallel low power manner. neural interfacing electrodes These topics discussed, progress, current challenges, future prospects.

Language: Английский

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Bio-Integrated Wearable Systems: A Comprehensive Review

Chemical Reviews, Journal Year: 2019, Volume and Issue: 119(8), P. 5461 - 5533

Published: Jan. 28, 2019

Bio-integrated wearable systems can measure a broad range of biophysical, biochemical, and environmental signals to provide critical insights into overall health status quantify human performance. Recent advances in material science, chemical analysis techniques, device designs, assembly methods form the foundations for uniquely differentiated type technology, characterized by noninvasive, intimate integration with soft, curved, time-dynamic surfaces body. This review summarizes latest this emerging field "bio-integrated" technologies comprehensive manner that connects fundamental developments chemistry, engineering sensing have potential widespread deployment societal benefit care. An introduction chemistries materials active components these contextualizes essential design considerations sensors associated platforms appear following sections. The subsequent content highlights most advanced biosensors, classified according their ability capture information. Additional sections feature schemes electrically powering strategies achieving fully integrated, wireless systems. concludes an overview key remaining challenges summary opportunities where chemistry will be critically important continued progress.

Language: Английский

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Advanced Soft Materials, Sensor Integrations, and Applications of Wearable Flexible Hybrid Electronics in Healthcare, Energy, and Environment

Advanced Materials, Journal Year: 2019, Volume and Issue: 32(15)

Published: July 8, 2019

Abstract Recent advances in soft materials and system integration technologies have provided a unique opportunity to design various types of wearable flexible hybrid electronics (WFHE) for advanced human healthcare human–machine interfaces. The biocompatible with miniaturized wireless systems is undoubtedly an attractive prospect the sense that successful device performance requires high degrees mechanical flexibility, sensing capability, user‐friendly simplicity. Here, most up‐to‐date materials, sensors, system‐packaging develop WFHE are provided. Details mechanical, electrical, physicochemical, properties discussed integrated sensor applications healthcare, energy, environment. In addition, limitations current discussed, as well key challenges future direction WFHE. Collectively, all‐inclusive review newly developed along summary imperative requirements material properties, capabilities, performance, skin integrations

Language: Английский

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Synthesis of micro/nanoscaled metal–organic frameworks and their direct electrochemical applications

Chemical Society Reviews, Journal Year: 2019, Volume and Issue: 49(1), P. 301 - 331

Published: Dec. 13, 2019

As a new class of crystalline porous materials, metal-organic frameworks (MOFs) have received great attention owing to their unique advantages ultrahigh surface area, large pore volume and versatile applications. Developing different strategies control the morphology size MOFs is very important for practical Recently, micro/nanosized been regarded as promising candidates electrode materials with excellent performances, which not only bridge gap between fundamental MOF science forward-looking applications, but also provide an opportunity make clear relationship morphologies properties. This review focuses on design fabrication one-, two- three-dimensional at micro/nanoscale, direct applications in batteries, supercapacitors electrocatalysis. A discussion challenges future prospects synthesis electrochemical micro/nanoscaled presented.

Language: Английский

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A hierarchically patterned, bioinspired e-skin able to detect the direction of applied pressure for robotics

Science Robotics, Journal Year: 2018, Volume and Issue: 3(24)

Published: Nov. 21, 2018

Tactile sensing is required for the dexterous manipulation of objects in robotic applications. In particular, ability to measure and distinguish real time normal shear forces crucial slip detection interaction with fragile objects. Here, we report a biomimetic soft electronic skin (e-skin) that composed an array capacitors capable measuring discriminating both tangential forces. It enabled by three-dimensional structure mimics interlocked dermis-epidermis interface human skin. Moreover, pyramid microstructures arranged along nature-inspired phyllotaxis spirals resulted e-skin increased sensitivity, minimal hysteresis, excellent cycling stability, response millisecond range. The provided feedback controlling robot arm various tasks, illustrating its potential application robotics tactile feedback.

Language: Английский

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Wearable Pressure Sensors for Pulse Wave Monitoring

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: Jan. 19, 2022

Abstract Cardiovascular diseases remain the leading cause of death worldwide. The rapid development flexible sensing technologies and wearable pressure sensors have attracted keen research interest been widely used for long‐term real‐time cardiovascular status monitoring. Owing to compelling characteristics, including light weight, wearing comfort, high sensitivity pulse pressures, physiological waveforms can be precisely continuously monitored by health Herein, an overview human wave monitoring is presented, with a focus on transduction mechanism, microengineering structures, related applications in condition assessment. conceptualizations methods acquisition pathological information system are outlined. biomechanics arterial waves working mechanism various sensors, triboelectric, piezoelectric, magnetoelastic, piezoresistive, capacitive, optical also subject systematic debate. Exemple measurement based structured devices then summarized. Finally, discussion opportunities challenges that face, as well their potential intelligent personalized healthcare given conclusion.

Language: Английский

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Stretchable, Transparent, and Self‐Patterned Hydrogel‐Based Pressure Sensor for Human Motions Detection

Advanced Functional Materials, Journal Year: 2018, Volume and Issue: 28(32)

Published: June 21, 2018

Abstract In this study, a binary networked conductive hydrogel is prepared using acrylamide and polyvinyl alcohol. Based on the obtained hydrogel, an ultrastretchable pressure sensor with biocompatibility transparency fabricated cost effectively. The exhibits impressive stretchability (>500%) superior (>90%). Furthermore, self‐patterned microarchitecture surface beneficial to achieve high sensitivity (0.05 kPa −1 for 0–3.27 kPa). hydrogel‐based can precisely monitor dynamic pressures (3.33, 5.02, 6.67 kPa) frequency‐dependent behavior. It also shows fast response (150 ms), durable stability (500 cycles), negligible current variation (6%). Moreover, instantly detect both tiny (phonation, airflowing, saliva swallowing) robust (finger limb motions) physiological activities. This work presents insights into preparing multifunctional hydrogels mechanosensory electronics.

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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Microstructured Porous Pyramid-Based Ultrahigh Sensitive Pressure Sensor Insensitive to Strain and Temperature

ACS Applied Materials & Interfaces, Journal Year: 2019, Volume and Issue: 11(21), P. 19472 - 19480

Published: May 6, 2019

An ultrahigh sensitive capacitive pressure sensor based on a porous pyramid dielectric layer (PPDL) is reported. Compared to that of the conventional layer, sensitivity was drastically increased 44.5 kPa-1 in range <100 Pa, an unprecedented for sensors. The enhanced attributed lower compressive modulus and larger change effective constant under pressure. By placing sensors islands hard elastomer embedded soft substrate, exhibited insensitivity strain. were also nonresponsive temperature. Finally, contact resistance-based demonstrated by chemically grafting PPDL with conductive polymer, which showed sensitivity.

Language: Английский

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Flexible Ferroelectric Sensors with Ultrahigh Pressure Sensitivity and Linear Response over Exceptionally Broad Pressure Range

ACS Nano, Journal Year: 2018, Volume and Issue: 12(4), P. 4045 - 4054

Published: April 12, 2018

Flexible pressure sensors with a high sensitivity over broad linear range can simplify wearable sensing systems without additional signal processing for the output, enabling device miniaturization and low power consumption. Here, we demonstrate flexible ferroelectric sensor ultrahigh response an exceptionally based on material structural design of composites multilayer interlocked microdome geometry. Due to stress concentration between arrays increased contact area in design, could perceive static/dynamic (47.7 kPa–1, 1.3 Pa minimum detection). In addition, efficient distribution stacked multilayers enables (0.0013–353 kPa) fast time (20 ms) reliability 5000 repetitive cycles even at extremely 272 kPa. Our be used monitor diverse stimuli from including weak gas flow, acoustic sound, wrist pulse pressure, respiration, foot single device.

Language: Английский

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