Flexible Metamaterial Electronics

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(52)

Published: March 24, 2022

Abstract Over the last decade, extensive efforts have been made on utilizing advanced materials and structures to improve properties functionalities of flexible electronics. While conventional ways are approaching their natural limits, a revolutionary strategy, namely metamaterials, is emerging toward engineering structural break existing fetters. Metamaterials exhibit supernatural physical behaviors, in aspects mechanical, optical, thermal, acoustic, electronic that inaccessible materials, such as tunable stiffness or Poisson's ratio, manipulating electromagnetic elastic waves, topological programmable morphability. These salient merits motivate metamaterials brand‐new research direction inspired innovative applications Here, groundbreaking interdisciplinary field first coined “flexible metamaterial electronics,” focusing enhancing innovating electronics via design metamaterials. Herein, latest progress trends this infant reviewed while highlighting potential value. First, brief overview starts with introducing combination Then, developed discussed, self‐adaptive deformability, ultrahigh sensitivity, multidisciplinary functionality, followed by discussion prospects. Finally, challenges opportunities facing advance cutting‐edge summarized.

Language: Английский

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Recent Progress in Active Mechanical Metamaterials and Construction Principles

Advanced Science, Journal Year: 2021, Volume and Issue: 9(1)

Published: Oct. 29, 2021

Abstract Active mechanical metamaterials (AMMs) (or smart metamaterials) that combine the configurations of and active control stimuli‐responsive materials have been widely investigated in recent decades. The elaborate artificial microstructures stimulus response characteristics both contribute to AMMs, making them achieve excellent properties beyond conventional metamaterials. micro macro structures AMMs are designed based on structural construction principles such as, phase transition, strain mismatch, instability. Considering controllability efficiency materials, physical fields temperature, chemicals, light, electric current, magnetic field, pressure adopted as external stimuli practice. In this paper, frontier works latest progress from aspects mechanics reviewed. functions engineering applications also discussed. Finally, existing issues future perspectives field briefly described. This review is expected provide basis inspiration for follow‐up research AMMs.

Language: Английский

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Programmable gear-based mechanical metamaterials

Nature Materials, Journal Year: 2022, Volume and Issue: 21(8), P. 869 - 876

Published: June 9, 2022

Abstract Elastic properties of classical bulk materials can hardly be changed or adjusted in operando, while such tunable elasticity is highly desired for robots and smart machinery. Although possible reconfigurable metamaterials, continuous tunability existing designs plagued by issues as structural instability, weak robustness, plastic failure slow response. Here we report a metamaterial design paradigm using gears with encoded stiffness gradients the constituent elements organizing gear clusters versatile functionalities. The enables continuously elastic preserving stability robust manoeuvrability, even under heavy load. Such gear-based metamaterials enable excellent modulation Young’s modulus two orders magnitude, shape morphing between ultrasoft solid states, fast This allows customization brings fully programmable adaptive within reach.

Language: Английский

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Deep Learning in Mechanical Metamaterials: From Prediction and Generation to Inverse Design

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(45)

Published: June 19, 2023

Abstract Mechanical metamaterials are meticulously designed structures with exceptional mechanical properties determined by their microstructures and constituent materials. Tailoring material geometric distribution unlocks the potential to achieve unprecedented bulk functions. However, current metamaterial design considerably relies on experienced designers' inspiration through trial error, while investigating responses entails time‐consuming testing or computationally expensive simulations. Nevertheless, recent advancements in deep learning have revolutionized process of metamaterials, enabling property prediction geometry generation without prior knowledge. Furthermore, generative models can transform conventional forward into inverse design. Many studies implementation highly specialized, pros cons may not be immediately evident. This critical review provides a comprehensive overview capabilities prediction, generation, metamaterials. Additionally, this highlights leveraging create universally applicable datasets, intelligently intelligence. article is expected valuable only researchers working but also those field materials informatics.

Language: Английский

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Micro‐Scale Auxetic Hierarchical Mechanical Metamaterials for Shape Morphing

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(14)

Published: Feb. 16, 2022

Shape morphing and the possibility of having control over mechanical properties via designed deformations have attracted a lot attention in materials community led to variety applications with an emphasis on space industry. However, current normally do not allow full deformation pattern often fail replicate such behavior at low scales which is essential flexible electronics. Thus, this paper, novel 2D 3D microscopic hierarchical metamaterials using mutually-competing substructures within system that are capable exhibiting broad range highly unusual auxetic proposed. Using experiments (3D microprinted polymers) supported by computer simulations, it shown ability can be controlled through geometric design parameters. Finally demonstrated considered structure form composite shape allowing deform predefined shape.

Language: Английский

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Digital Light Processing 3D Printing of Tough Supramolecular Hydrogels with Sophisticated Architectures as Impact‐Absorption Elements

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

Published: June 27, 2022

Processing tough hydrogels into sophisticated architectures is crucial for their applications as structural elements. However, Digital Light (DLP) printing of challenging because the low-speed gelation and toughening process. Described here a simple yet versatile system suitable DLP to form hydrogel architectures. The aqueous precursor consists commercial photoinitiator, acrylic acid, zirconium ion (Zr4+ ), readily forming metallo-supramolecular under digital light in situ formation carboxyl-Zr4+ coordination complexes. high-stiffness antiswelling properties as-printed gel enable high-efficiency high-fidelity constructs. Furthermore, swelling-induced morphing also achieved by encoding structure gradients during with grayscale light. Mechanical printed are further improved after incubation water due variation local pH rearrangement complex. swelling-enhanced stiffness affords shape fixation ability manual deformations, thereby provides an additional avenue more complex configurations. These used devise impact-absorption element or high-sensitivity pressure sensor proof-of-concept examples. This work should merit engineering other gels extend scope diverse fields.

Language: Английский

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Recent Progress in Reconfigurable and Intelligent Metasurfaces: A Comprehensive Review of Tuning Mechanisms, Hardware Designs, and Applications

Advanced Science, Journal Year: 2022, Volume and Issue: 9(33)

Published: Sept. 18, 2022

Abstract Intelligent metasurfaces have gained significant importance in recent years due to their ability dynamically manipulate electromagnetic (EM) waves. Their multifunctional characteristics, realized by incorporating active elements into the metasurface designs, huge potential numerous novel devices and exciting applications. In this article, progress field of intelligent are reviewed, focusing particularly on tuning mechanisms, hardware Reconfigurable programmable metasurfaces, classified as space gradient, time modulated, space–time modulated discussed. Then, reconfigurable surfaces (RISs) that can alter wireless environments, considered a promising technology for sixth‐generation communication networks, explored. Next, made simultaneously transmitting reflecting (STAR‐RISs) achieve full‐space EM wave control summarized. Finally, perspective challenges future directions presented.

Language: Английский

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Micro‐Scale Mechanical Metamaterial with a Controllable Transition in the Poisson's Ratio and Band Gap Formation

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: March 2, 2023

The ability to change significantly mechanical and wave propagation properties of a structure without rebuilding it has been one the main challenges in field metamaterials. This stems from enormous appeal that, especially case micro-scale systems, such tunable behavior may offer perspective applications ranging biomedical protective devices. In this work, novel metamaterial is proposed that can undergo transition type configuration another, with having very negative Poisson's ratio, corresponding strong auxeticity, other highly positive ratio. formation phononic band gaps, at same time, be controlled, which useful design vibration dampers sensors. Finally, shown experimentally reconfiguration system, leading its properties, induced controlled remotely through application magnetic field, thanks appropriately distributed inclusions.

Language: Английский

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3D‐Printed Micro/Nano‐Scaled Mechanical Metamaterials: Fundamentals, Technologies, Progress, Applications, and Challenges

Small, Journal Year: 2023, Volume and Issue: 19(29)

Published: April 7, 2023

Micro/nano-scaled mechanical metamaterials have attracted extensive attention in various fields attributed to their superior properties benefiting from rationally designed micro/nano-structures. As one of the most advanced technologies 21st century, additive manufacturing (3D printing) opens an easier and faster path for fabricating micro/nano-scaled with complex structures. Here, size effect at micro/nano scales is introduced first. Then, fabricate are introduced. The latest research progress on also reviewed according type materials. In addition, structural functional applications further summarized. Finally, challenges, including 3D printing technologies, novel material development, innovative design, discussed, future perspectives provided. review aims provide insight into development 3D-printed metamaterials.

Language: Английский

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Rational designs of mechanical metamaterials: Formulations, architectures, tessellations and prospects

Materials Science and Engineering R Reports, Journal Year: 2023, Volume and Issue: 156, P. 100755 - 100755

Published: Oct. 7, 2023

Language: Английский

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