3D Graphene Materials: From Understanding to Design and Synthesis Control

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(18), P. 10336 - 10453

Published: Aug. 27, 2020

Carbon materials, with their diverse allotropes, have played significant roles in our daily life and the development of material science. Following 0D C60 1D carbon nanotube, 2D graphene distinctively fascinating properties, been receiving tremendous attention since 2004. To fulfill efficient utilization sheets applications such as energy storage conversion, electrochemical catalysis, environmental remediation, 3D structures constructed by attempted over past decade, giving birth to a new generation materials called materials. This review starts definition, classifications, brief history, basic synthesis chemistries Then critical discussion on design considerations for is provided. Subsequently, after emphasizing importance normalized property characterization structures, approaches from three major types sources (GO, hydrocarbons inorganic compounds) based GO chemistry, hydrocarbon alkali-metal respectively, are comprehensively reviewed focus mechanisms, controllable aspects, scalability. At last, current challenges future perspectives addressed.

Language: Английский

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Recent Progress on Flexible Capacitive Pressure Sensors: From Design and Materials to Applications

Advanced Materials Technologies, Journal Year: 2021, Volume and Issue: 6(4)

Published: March 5, 2021

Abstract For decades, the revolution in design and fabrication methodology of flexible capacitive pressure sensors using various inorganic/organic materials has significantly enhanced field wearable electronics with a wide range applications aerospace, automobiles, marine environment, robotics, healthcare, consumer/portable electronics. Mathematical modelling, finite element simulations, unique strategies are utilized to fabricate diverse shapes diaphragms, shells, cantilevers which function normal, touch, or double touch modes, operation principles inspired from microelectromechanical systems (MEMS) based sensing techniques. The technique detects changes capacitance due deformation/deflection sensitive mechanical that alters separation gap capacitor. Due advancement state‐of‐the‐art technologies, performance properties enhanced. In this review paper, recent progress techniques terms design, materials, is reported. mechanics steps paper‐based low‐cost MEMS/flexible devices also broadly Lastly, sensors, challenges, future perspectives discussed.

Language: Английский

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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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Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

Advanced Science, Journal Year: 2021, Volume and Issue: 8(23)

Published: Sept. 14, 2021

An electrostatic capacitor has been widely used in many fields (such as high pulsed power technology, new energy vehicles, etc.) due to its ultrahigh discharge density. Remarkable progress made over the past 10 years by doping ferroelectric ceramics into polymers because dielectric constant is positively correlated with storage However, this method often leads an increase loss and a decrease efficiency. Therefore, way of using multilayer structure improve density attracted attention researchers. Although research on properties just beginning, it shows excellent effect huge potential. In review, main physical mechanisms polarization, breakdown are introduced, theoretical simulation experimental results systematically summarized, preparation methods design ideas dielectrics mainly described. This article covers not only overview state-of-the-art advances but also prospects that may open another window tune electrical performance via designing structure.

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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Printable, Highly Sensitive Flexible Temperature Sensors for Human Body Temperature Monitoring: A Review

Nanoscale Research Letters, Journal Year: 2020, Volume and Issue: 15(1)

Published: Oct. 15, 2020

Abstract In recent years, the development and research of flexible sensors have gradually deepened, performance wearable, devices for monitoring body temperature has also improved. For human body, changes reflect much information about health, abnormal usually indicate poor health. Although is independent environment, surface easily affected by surrounding bringing challenges to equipment. To achieve real-time sensitive detection various parts researchers developed many different types high-sensitivity sensors, perfecting function electronic skin, proposed practical applications. This article reviews current status highly patterned used monitor changes. First, commonly substrates active materials been summarized. Second, fabricating methods processes are introduced. Then, sensing comprehensively discussed, including measurement range, sensitivity, response time, resolution. Finally, application based on delicate patterning demonstrated, future prospected.

Language: Английский

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Enhanced Sensitivity of Capacitive Pressure and Strain Sensor Based on CaCu₃Ti₄O₁₂ Wrapped Hybrid Sponge for Wearable Applications

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(31)

Published: June 10, 2020

Abstract Pressure sensors with highly sensitive and flexible characteristics have extensive applications in wearable electronics, soft robotics, human–machine interface, more. Herein, an effective strategy is explored to enhance the sensitivity of capacitive pressure sensor by fabricating a dielectric hybrid sponge consisting calcium copper titanate (CaCu 3 Ti 4 O 12 , CCTO), giant permittivity material, polyurethane (PU). An ultrasoft CCTO@PU fabricated via dip‐coating PU into surface‐modified CCTO nanoparticles using 3‐aminopropyl triethoxysilane. The overall results show that –NH 2 functionalized attributes proper adhesion –OCN group interfacial polarization leading high (167.05) low loss tangent (0.71) beneficial for sensing applications. Moreover, as‐prepared at 30 wt% concentration exhibits excellent electromechanical properties ultralow compression modulus 27.83 kPa 0.73 −1 low‐pressure regime (<1.6 kPa). Finally, strain performance demonstrated detection human activities mounting on various parts body. work reveals new opportunity facile fabrication CCTO‐based multifunctional properties.

Language: Английский

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Morphological Engineering of Sensing Materials for Flexible Pressure Sensors and Artificial Intelligence Applications

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: July 5, 2022

As an indispensable branch of wearable electronics, flexible pressure sensors are gaining tremendous attention due to their extensive applications in health monitoring, human –machine interaction, artificial intelligence, the internet things, and other fields. In recent years, highly have been developed using various materials/structures transduction mechanisms. Morphological engineering sensing materials at nanometer micrometer scales is crucial obtaining superior sensor performance. This review focuses on rapid development morphological technologies for sensors. We discuss different architectures designs achieve high performance, including sensitivity, broad working range, stable sensing, low hysteresis, transparency, directional or selective sensing. Additionally, general fabrication techniques summarized, self-assembly, patterning, auxiliary synthesis methods. Furthermore, we present emerging high-performing microengineered healthcare, smart homes, digital sports, security machine learning-enabled computational platform. Finally, potential challenges prospects future developments discussed comprehensively.

Language: Английский

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Recent advances of wearable and flexible piezoresistivity pressure sensor devices and its future prospects

Journal of Materiomics, Journal Year: 2020, Volume and Issue: 6(1), P. 86 - 101

Published: Jan. 21, 2020

The human skin inspired soft electronic devices have attracted broadly research attention in the past decades as promising potential applications health monitoring and diagnosis, robotics, prosthetics. wearable piezoresistivity pressure sensor is one of most attractive candidates for development advanced its simple mechanism, compact structure, low cost power energy consumption ease signal acquisition transforms advantages. In this review, we will explore recent progress achievements field sensor, focusing on fundamentals materials related to devices, including active materials, substrate electrode materials. Subsequently, challenges outlook are discussed. We list several current perspectives sensors. Several critical topics optimization sensitivity working range sensing toward practical Finally, slip force vectors sensors, developing technologies multi-function high-resolution systems signals process examined highlight near future tendency field.

Language: Английский

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Mussel-Inspired Redox-Active and Hydrophilic Conductive Polymer Nanoparticles for Adhesive Hydrogel Bioelectronics

Nano-Micro Letters, Journal Year: 2020, Volume and Issue: 12(1)

Published: Aug. 18, 2020

Abstract Conductive polymers (CPs) are generally insoluble, and developing hydrophilic CPs is significant to broaden the applications of CPs. In this work, a mussel-inspired strategy was proposed construct CP nanoparticles (CP NPs), while endowing NPs with redox activity biocompatibility. This universal applicable for series CPs, including polyaniline, polypyrrole, poly(3,4-ethylenedioxythiophene). The catechol/quinone contained sulfonated lignin (LS) doped into various form CP/LS hydrophilicity, conductivity, activity. These were used as versatile nanofillers prepare conductive hydrogels long-term adhesiveness. NPs-incorporated have good conductivity because uniform distribution in hydrogel network, forming well-connected electric path. exhibits adhesiveness, which attributed dynamic balance groups on NPs. adhesive shows electroactivity biocompatibility therefore has broad electrostimulation tissue regeneration implantable bioelectronics.

Language: Английский

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