Advances in flexible sensors for intelligent perception system enhanced by artificial intelligence

InfoMat, Journal Year: 2023, Volume and Issue: 5(5)

Published: March 23, 2023

Abstract Intelligent perception means that with the assistance of artificial intelligence (AI)‐motivated brain, flexible sensors achieve ability memory, learning, judgment, and reasoning about external information like human brain. Due to superiority machine learning (ML) algorithms in data processing intelligent recognition, systems possess match or even surpass systems. However, built‐in these need work on dynamic irregular surfaces, inevitably affecting precision fidelity acquired data. In recent years, strategy introducing developed functional materials innovative structures into has made some progress toward above challenges, blessing ML algorithms, accurate various scenarios have been achieved. Here, most representative for constructing are comprehensively reviewed, research based is further summarized, intersection two expected unlock new opportunities next‐stage AI development. image

Language: Английский

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Motion artefact management for soft bioelectronics

Nature Reviews Bioengineering, Journal Year: 2024, Volume and Issue: 2(7), P. 541 - 558

Published: April 15, 2024

Language: Английский

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A Snakeskin‐Inspired, Soft‐Hinge Kirigami Metamaterial for Self‐Adaptive Conformal Electronic Armor

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(31)

Published: June 10, 2022

Abstract A majority of soft‐body creatures evolve armor or shells to protect themselves. Similar protection demand is for flexible electronics working in complex environments. Existing works mainly focus on improving the sensing capabilities such as electronic skin (E‐skin). Inspired by snakeskin, a novel (E‐armor) proposed, which not only possesses mechanical flexibility and functions similar E‐skin, but also able itself underlying soft body from external physical damage. The geometry kirigami metamaterial (Kiri‐MM) ensures auxetic stretchability meanwhile large areal coverage sufficient protection. Moreover, suppress inherent undesired out‐of‐plane buckling conventional Kiri‐MMs conformal applications, hinges are used form distinct (hinges)‐rigid (tiles) configuration. Analytical, computational, experimental studies behaviors soft‐hinge Kiri‐MM E‐armor demonstrate merits this design, i.e., stretchability, conformability, protectability, applied electronics. Deploying conductive material at enables facile wiring strategies large‐scale circuit arrays. Functional systems controllable display purposes provide simple examples wide spectrum applications concept.

Language: Английский

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Flexible and Stretchable Light-Emitting Diodes and Photodetectors for Human-Centric Optoelectronics

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(3), P. 768 - 859

Published: Jan. 19, 2024

Optoelectronic devices with unconventional form factors, such as flexible and stretchable light-emitting or photoresponsive devices, are core elements for the next-generation human-centric optoelectronics. For instance, these deformable can be utilized closely fitted wearable sensors to acquire precise biosignals that subsequently uploaded cloud immediate examination diagnosis, also used vision systems human-interactive robotics. Their inception was propelled by breakthroughs in novel optoelectronic material technologies device blueprinting methodologies, endowing flexibility mechanical resilience conventional rigid devices. This paper reviews advancements soft technologies, honing on various materials, manufacturing techniques, design strategies. We will first highlight general approaches fabrication, including appropriate selection substrate, electrodes, insulation layers. then focus materials diodes, their integration strategies, representative application examples. Next, we move photodetectors, highlighting state-of-the-art fabrication methods, followed At end, a brief summary given, potential challenges further development of functional discussed conclusion.

Language: Английский

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4D printed bio-inspired mesh composite materials with high stretchability and reconfigurability

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 249, P. 110503 - 110503

Published: Feb. 15, 2024

Language: Английский

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Design and macroscopic mechanical responses of auxetic metamaterials with tunable stiffness

Materials & Design, Journal Year: 2024, Volume and Issue: 241, P. 112913 - 112913

Published: April 2, 2024

This research presents the design, manufacturing, and macroscopic characterization of flexible mechanical metamaterials with tunable elastic properties. The constants were given using energy principle Castigliano's second theorem, results validated through static simulations tensile experiments, showing good agreement. Then complete parametric study was conducted to demonstrate possibility extensively customizing Poisson effect stiffness. Additionally, comparison between developed star-shaped cellular structures on properties six groups samples. demonstrated that exhibited remarkable superiority in deformability, sensitivity, auxeticity. Furthermore, an innovative experiment is devised characterize responses coupling system complemented numerical modeling, similar phenomenon also observed other metamaterials. proposed design offered a way induce system's profile occurring wavy deformation.

Language: Английский

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Recent Advances of Auxetic Metamaterials in Smart Materials and Structural Systems

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Abstract Auxetic metamaterials refer to materials and structures with extraordinary deformation, i.e., transverse expansion (contraction) under uniaxial tension (compression). In recent decades, a very wide range of innovative functional performance has been discovered stemming from this behavior. This desirable exhibition adaptivity, programmability, functionality provides great potential in soft intelligent systems. However, thus far, the mainstream research on auxetic focused subjective design, monotonic mechanical properties, passive tunability. review thorough overview classical properties applications, primary objective proposing new roadmap auxetics for advances interdisciplinary field. The fundamental works are categorized different configurations mechanisms. particular, integration shape morphing, actuation, sensing, multiphysical response, inverse design is reviewed detail. To accelerate development smart structural systems, applications generalized into robotics (outside body), human–machine interaction (surrounding healthcare devices (inside body). Finally, several significant topics emphasized theory, material choice, manufacturing technique, applications.

Language: Английский

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Design optimisation of kirigami-based auxetic metamaterials with multistability and shape-morphing capability

Virtual and Physical Prototyping, Journal Year: 2025, Volume and Issue: 20(1)

Published: Jan. 15, 2025

This study presents the development of kirigami-based auxetic metamaterials with multistability and shape-morphing capabilities through a design optimisation framework leveraging machine learning technology. The employs surrogate models differential evolution algorithm to optimise variables kirigami cell, ensuring specified bistability scalability conditions. cell-level is extended structure-level, where each cell optimised for its assigned scalability. For multistability, structure divided into subregions distinct levels, conducted accordingly. shape morphing, expansion ratio predefined according target geometry, performed ensure required Various structures, combining different levels geometries, are optimally designed additively manufactured experimental validation. results confirm that proposed effectively controls behaviour, enabling tunable shapes morphing programmed transformation sequences.

Language: Английский

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Inversely engineered biomimetic flexible network scaffolds for soft tissue regeneration

Science Advances, Journal Year: 2023, Volume and Issue: 9(39)

Published: Sept. 27, 2023

Graft-host mechanical mismatch has been a longstanding issue in clinical applications of synthetic scaffolds for soft tissue regeneration. Although numerous efforts have devoted to resolve this grand challenge, the regenerative performance existing remains limited by slow growth (comparing autograft) and failures. We demonstrate class rationally designed flexible network that can precisely replicate nonlinear responses tissues enhance regeneration via reduced graft-host mismatch. Such scaffold includes tubular frame containing inversely engineered curved microstructures produce desired properties, with an electrospun ultrathin film wrapped around offer proper microenvironment cell growth. Using rat models sciatic nerve defects or Achilles tendon injuries, our show performances evidently superior clinically approved conduit achieve similar outcomes autologous transplantation prevention target organ atrophy recovery static index.

Language: Английский

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Engineering Kirigami Frameworks Toward Real‐World Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Nov. 21, 2023

The surge in advanced manufacturing techniques has led to a paradigm shift the realm of material design from developing completely new chemistry tailoring geometry within existing materials. Kirigami, evolved traditional cultural and artistic craft cutting folding, emerged as powerful framework that endows simple 2D sheets with unique mechanical, thermal, optical, acoustic properties, well shape-shifting capabilities. Given its flexibility, versatility, ease fabrication, there are significant efforts kirigami algorithms create various architectured materials for wide range applications. This review summarizes fundamental mechanisms govern transformation structures elucidates how these contribute their distinctive including high stretchability adaptability, tunable surface topography, programmable shape morphing, characteristics bistability multistability. It then highlights several promising applications enabled by designs concludes an outlook on future challenges perspectives kirigami-inspired metamaterials toward real-world

Language: Английский

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