Aligning curved stacking bands to simultaneously strengthen and toughen lamellar materials

Jiang, Yanqiu; Guo, Fangwei; Zhang, Jiacheng; Xu, Zhen; Wang, Fang; Cai, Shengying; Liu, Yingjun; Han, Yi; Chen, Chen; Liu, Yilun; Gao, Weiwei; Gao, Chao

doi:10.1039/d2mh01023b

Cited by 5 publications

(2 citation statements)

References 61 publications

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“…Notably, we identified a flexible and tailorable graphene film (GF) as an ideal substrate, owing to its strong affinity with the aromatic structure on 2D COF and high resistance to various organic solvents. [24,[29][30][31] In a standard fabrication process, a dehydrated GF is immersed in the freshly prepared reaction solution at room temperature. This method yields a spectrum of COF coatings with structural coloration spanning the entire visible range, achievable within a timeframe of 9-72 h (Figure 1b,c).…”

Section: Fabricating Meta-structured (Ms) Cof Nanocoatings By Cldmentioning

confidence: 99%

Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

Jiang,

Chen,

Zhang

et al. 2024

Advanced Materials

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High‐performance multifunctional nanocoatings not only protect and enhance substrate materials, but also offer additional functionalities. This demands a sophisticated coordination of the coating's inherent properties and microstructural features. Here we present a multi‐functional active nanocoating via meta‐structural engineering of covalent organic framework (COF) deposition materials. Our COF nanocoating, characterized by well‐defined micropores (1‐2 nm), meta‐structured textures (30‐300 nm), tailored thickness (100‐300 nm), and good uniformness, showcases a unique combination of angle‐independent structural coloration and ultrafast responsiveness to gaseous stimuli. Remarkably, it demonstrates good compatibility with a wide range of inert substrate materials, from rigid ones like glass and metal to flexible elastomers and nanomaterial films of various shapes and sizes. This versatility enables the facile development of devices that can optically report information about their environments. Examples include chemically active coatings with ultrafast (∼ 10 ms) color‐changing behaviors and programmable actuation behaviors upon exposure to gaseous stimuli, and mechanically active coatings that can detect substrate strain up to 50% yet maintain structural robustness and consistent coloration hue. We believe that meta‐structural engineering of COF nanocoatings on inert substrates could enable them to respond to environmental stimuli, potentially indicating a new trend in developing multifunctional materials and smart devices.This article is protected by copyright. All rights reserved

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Section: Fabricating Meta-structured (Ms) Cof Nanocoatings By Cldmentioning

confidence: 99%

Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

Jiang,

Chen,

Zhang

et al. 2024

Advanced Materials

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“…[33] In 2023, L. Zhang predicted that the collective effect of compressive strain and electron doping can make the T c of FeClF approaches the RT (286 K). [34] Compared with Fe-based Janus TM dihalides, the magnetic properties of Janus structures of Co-based TM dihalides are relatively unexplored, despite the presence of stable lattice similar to the former one.…”

Section: Introductionmentioning

confidence: 99%

Janus Single‐Layer CoClBr: A Direct Ferromagnetic Semiconductor with Controllable BandGap and Enhanced Magnetic Anisotropy Under Strain

Xu,

Wan,

Peng

et al. 2024

Annalen der Physik

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The 2D materials with both ferromagnetism and semiconducting properties are desirable for spintronics applications. Here, inspired by the successful synthesis of single‐layer CoCl2, it predicts that Janus single‐layer CoClBr is a 2D intrinsic ferromagnetic semiconductor with a direct bandgap of 3.71 eV by first‐principles calculations. Single‐layer CoClBr exhibits an in‐plane magnetic anisotropic energy (MAE) of 542.25 μeV per Co atom and a Curie temperature (Tc) of 89.49 K. Biaxial strain can effectively modulate its bandgap, MAE, and Tc, but will not change the ferromagnetic ground state. Compressive strain can increase the Curie temperature and switch the spin moment from in‐plane direction to out‐of‐plane direction. Tensile strain can enlarge the bandgap and introduce a direct‐to‐indirect bandgap transition in CoClBr. The MAE of CoClBr reaches 391.73 μeV per Co atom and 1560.49 μeV per Co atom at a compressive strain of ‐2% and a tensile strain of 5%, respectively. The tunable electronic and magnetic properties of Janus single‐layer CoClBr has potential application in low‐dimensional spintronics devices.

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Highly Aligned Graphene Aerogels for Multifunctional Composites

Wu,

An,

Guo

et al. 2024

Nano-Micro Lett.

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Stemming from the unique in-plane honeycomb lattice structure and the sp2 hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds, graphene exhibits remarkable anisotropic electrical, mechanical, and thermal properties. To maximize the utilization of graphene's in-plane properties, pre-constructed and aligned structures, such as oriented aerogels, films, and fibers, have been designed. The unique combination of aligned structure, high surface area, excellent electrical conductivity, mechanical stability, thermal conductivity, and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions, enabling advancements in diverse fields. This review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their composites. It highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and quantitatively. The oriented scaffolds endow graphene aerogels and their composites with anisotropic properties, showing enhanced electrical, mechanical, and thermal properties along the alignment at the sacrifice of the perpendicular direction. This review showcases remarkable properties and applications of aligned graphene aerogels and their composites, such as their suitability for electronics, environmental applications, thermal management, and energy storage. Challenges and potential opportunities are proposed to offer new insights into prospects of this material.

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Aligning curved stacking bands to simultaneously strengthen and toughen lamellar materials

Abstract: Layered architecture endows structural materials like nacre and biomimetic ceramics with enhanced mechanical performance because it introduces multiple strengthening and toughening mechanisms. Yet present studies predominantly involve enhancing the alignment...

Cited by 5 publications

References 61 publications

Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

Janus Single‐Layer CoClBr: A Direct Ferromagnetic Semiconductor with Controllable BandGap and Enhanced Magnetic Anisotropy Under Strain

Highly Aligned Graphene Aerogels for Multifunctional Composites

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