Nanoscale three-dimensional fabrication based on mechanically guided assembly

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 14, 2023

The growing demand for complex three-dimensional (3D) micro-/nanostructures has inspired the development of corresponding manufacturing techniques. Among these techniques, 3D fabrication based on mechanically guided assembly offers advantages broad material compatibility, high designability, and structural reversibility under strain but is not applicable nanoscale device printing because bottleneck at nanofabrication design technique. Herein, a configuration-designable suggested through robust nanotransfer methodology substrate's mechanical characteristics. Covalent bonding-based two-dimensional allowing nanostructure elastomer substrates used to address problems, while feasibility configuration modulation characteristics examined using analytical calculations numerical simulations, various nanostructures. printed nanostructures exhibit strain-independent electrical properties are therefore fabricate stretchable H2 NO2 sensors with performances stable external strains 30%.

Language: Английский

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Bio‐Inspired Fog Harvesting Meshes: A Review

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(35)

Published: Nov. 15, 2023

Abstract Freshwater scarcity has become a critical global challenge affecting some of the most vulnerable populations. In response, significant effort focused on ways to increase access this precious resource. Within context geographical, cultural, political, and technological factors governing freshwater availability, atmospheric water harvesting (AWH) demonstrated tremendous promise help address these shortages. Specifically, mesh‐based fog harvesters have received considerable attention for their passive qualities compared with energy‐dependent siblings (sorbents, condensation, etc.), yet specific yield (SY) developed only modestly in recent decades. While plant animal kingdom provide diverse examples collection, science remarkable understanding processes, much knowledge be translated practically at scale. This is partially due challenges mass‐producing complex (often micro‐scale) structures observed nature. Fortunately, manufacturing technology catching up scientific understanding, especially scale mesh design. To end, review begins by surveying bioinspired research harvesting. Afterward, study identifies milestones developing meshes, concluding discussion future opportunities connecting bioinspiration emerging advanced techniques.

Language: Английский

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Smart Bionic Structures: Connecting Nature and Technology through Additive Manufacturing

Deleted Journal, Journal Year: 2024, Volume and Issue: 3(2), P. 200137 - 200137

Published: April 21, 2024

The ability of organisms to adjust environmental changes offers valuable insights into the development and creation innovative smart systems. As requirements increase, materials change their shapes has become a broader aim beyond original capabilities. In contrast conventional manufacturing methods, additive (AM) skillfully combines precise three-dimensional structures intricate response mechanisms biological with materials. This combination enables production bionic programmable features. Trends such as dynamic modulation, responsiveness multiple stimuli, integration functions are emerging significant in structures. review first presents that nature designed built various organisms, highlighting relationship between structural characteristics patterns deformation. then discusses how developed using AM techniques respond different stimuli. Additionally, potential uses biomedicine, intelligent robotics, origami construction, aerospace discussed. Finally, challenges future prospects for examined goal offering solutions creating next generation systems through interdisciplinary research.

Language: Английский

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Materials Inspired by Living Functions

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: March 19, 2024

Abstract Engineering or mimicking living materials found in nature has the potential to transform use of materials. Unlike classic synthetic which are typically optimized for static properties, economics, and recently also sustainability, life dynamic, feedback‐controlled, evolving, adaptive. Although do not exhibit such complicated functionalities, researchers increasingly challenging this viewpoint expanding material concepts toward dynamic systems inspired by selected life‐like functions. Herein, it is suggested that can be approached from two perspectives: through engineering biological organisms their functions provide basis new materials, producing with rudimentary life‐inspired Current advances discussed perspectives (i) features based on built‐in memory associative learning, (ii) emergent structures self‐regulated designs using non‐equilibrium systems, (iii) interfacing non‐living form cellular community control growth open routes fabrication. Strategies combining (i)–(iii) responses applications interactive autonomous devices, helping realize next‐generation sensors, soft robots, external over bioproduction self‐organizing structural

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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Interlinking spatial dimensions and kinetic processes in dissipative materials to create synthetic systems with lifelike functionality

Nature Nanotechnology, Journal Year: 2023, Volume and Issue: 19(2), P. 146 - 159

Published: Dec. 6, 2023

Language: Английский

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Multipotent Mesenchymal Stem Cell-Based Therapies for Spinal Cord Injury: Current Progress and Future Prospects

Biology, Journal Year: 2023, Volume and Issue: 12(5), P. 653 - 653

Published: April 26, 2023

Spinal cord injury (SCI) represents a significant medical challenge, often resulting in permanent disability and severely impacting the quality of life for affected individuals. Traditional treatment options remain limited, underscoring need novel therapeutic approaches. In recent years, multipotent mesenchymal stem cells (MSCs) have emerged as promising candidate SCI due to their multifaceted regenerative capabilities. This comprehensive review synthesizes current understanding molecular mechanisms underlying MSC-mediated tissue repair SCI. Key discussed include neuroprotection through secretion growth factors cytokines, promotion neuronal regeneration via MSC differentiation into neural cell types, angiogenesis release pro-angiogenic factors, immunomodulation by modulating immune activity, axonal driven neurotrophic glial scar reduction modulation extracellular matrix components. Additionally, examines various clinical applications MSCs treatment, such direct transplantation injured spinal cord, engineering using biomaterial scaffolds that support survival integration, innovative cell-based therapies like MSC-derived exosomes, which possess neuroprotective properties. As field progresses, it is crucial address challenges associated with MSC-based therapies, including determining optimal sources, intervention timing, delivery methods, well developing standardized protocols isolation, expansion, characterization. Overcoming these will facilitate translation preclinical findings practice, providing new hope improved individuals living devastating consequences

Language: Английский

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4D Printed Protein‐AuNR Nanocomposites with Photothermal Shape Recovery

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(14)

Published: Dec. 24, 2023

Abstract 4D printing is the 3D of objects that change chemically or physically in response to an external stimulus over time. Photothermally responsive shape memory materials are attractive for their ability undergo remote activation. While photothermal methods using gold nanorods (AuNRs) used recovery, patterning these into with complex geometries degradable not addressed. Here, fabrication printed bioplastics photo‐activated recovery reported. Protein‐based nanocomposites based on bovine serum albumin (BSA), poly (ethylene glycol) diacrylate (PEGDA), and AuNRs developed vat photopolymerization. These mechanically deformed under high loads, proteins served as mechano‐active elements unfolded energy‐dissipating mechanism prevented fracture thermoset. The bioplastic object maintained its metastable shape‐programmed state ambient conditions. Subsequently, up 99% achieved within 1 min irradiation near‐infrared (NIR) light. Mechanical characterization small angle X‐ray scattering (SAXS) analysis suggest unfold during programming step may refold recovery. composites promising biodegradable shape‐morphing devices robotics medicine.

Language: Английский

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Synthesis and application of sustainable vegetable oil-based polymers in 3D printing

RSC Sustainability, Journal Year: 2024, Volume and Issue: 2(6), P. 1708 - 1737

Published: Jan. 1, 2024

Chemical modifications of vegetable oil and their 3D printing applications are discussed. Acrylate resin compatibility with methods presented. printed products using oil-derived materials, providing insights into future opportunities explored.

Language: Английский

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Silk-protein-based gradient hydrogels with multimode reprogrammable shape changes for biointegrated devices

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(33)

Published: Aug. 7, 2023

Biocompatible and morphable hydrogels capable of multimode reprogrammable, adaptive shape changes are potentially useful for diverse biomedical applications. However, existing systems often rely on complicated structural designs involving cumbersome energy-intensive fabrication processes. Here, we report a simple electric-field-activated protein network migration strategy to reversibly program silk-protein with controllable reprogrammable complex transformations. The application low electric field enables the convergence net negatively charged cross-linking networks toward anode (isoelectric point plane) due pH gradient generated in process, facilitating formation structure suitable three-dimensional change. These tunable can be reprogrammed or permanently fixed by control polymorphic transitions. We show that these morphing conformally interfacing biological tissues programming bimorph consisting aligned carbon nanotube multilayers silk was assembled illustrate utility as an implantable bioelectronic device localized low-voltage electrical stimulation sciatic nerve rabbit.

Language: Английский

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