Gradient-crosslinked hydrogel microdome pattern for multilevel chromatic encryption

Science China Chemistry, Journal Year: 2023, Volume and Issue: 66(12), P. 3567 - 3575

Published: Nov. 14, 2023

Language: Английский

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Phase change polymer-based structural color photonic films for contactless and inkless writing irreversibly

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154992 - 154992

Published: Aug. 23, 2024

Language: Английский

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Optimized and Uniform Strain Control in Intrinsic Stretchable Mechanochromic Materials with Color‐ and Polarization‐Separating Encryption Using Kirigami Cuts and Rigid Strain‐Stoppers

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Intrinsically stretchable devices often suffer from non‐uniform strain distributions under direct‐stretching conditions due to their large‐scale, patterned designs, leading inconsistent performance. To address these issues, mechanochromic materials—substances that change color in response strain—for precise and intuitive monitoring are employed. Leveraging this data, strategic design modifications, including extrinsic techniques such as rigid‐island with soft‐substrate kirigami cuts implemented, mitigate non‐uniformity. Thus, highly desired uniform homogenous control a multi‐pixel system is achieved. By integrating strain‐stopping methods into arrays of rigid soft chiral liquid crystal elastomers (CLCEs), effective separation demonstrated for encrypted information enhanced uniformity control. Additionally, the dynamic optical selectivity circularly polarized light (CPL) CLCEs specific explored, using uniaxial stretching achieve both changes refined CPL separation. Consequently, leveraging inherent properties CLCEs, functional operating devised. The application strategies not only resolves issues but also advances field smart materials, offering new possibilities color‐ polarization‐separating based on applications.

Language: Английский

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Reconfigurable High-Efficiency metadevice using Kirigami-Inspired phase gradient metasurfaces

Results in Physics, Journal Year: 2023, Volume and Issue: 53, P. 106949 - 106949

Published: Sept. 10, 2023

Kirigami-inspired metasurface has attracted great attention in electromagnetic (EM) wave manipulations, due to its unprecedented and tailorable structural transformations via mechanical approaches. However, it is still challenging for wavefront control because of unfeasibility forming a phase gradient at different folding angle β. Here, we report strategy kirigami-inspired reconfigurable metasurfaces efficiently beam steering scattering through mechanically changing β, where the range β theoretically derived based on EM diffraction generalized Snell's law. For demonstration, anomalous reflectors with high efficiency are demonstrated both dual-element tri-element tunable metadevices. In former case, reflection varies within 37°∼47° under polarization along y axis by 10°∼40°, whereas 36°∼50° that x when changed 10°∼39°, numerical experimental results show measured over 78.6%. latter metadevice various states also experimentally characterized further verify our strategy. Compared available metasurfaces, using maneuverable structures more versatile shows potential engineering applications.

Language: Английский

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Designing vibrant and bright transmission colors with multilayer film structures

Physica B Condensed Matter, Journal Year: 2023, Volume and Issue: 673, P. 415468 - 415468

Published: Nov. 2, 2023

Language: Английский

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