Angle‐Multiplexed 3D Photonic Superstructures with Multi‐Directional Switchable Structural Color for Information Transformation, Storage, and Encryption

Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)

Published: May 17, 2024

Abstract Creating photonic crystals that can integrate and switch between multiple structural color images will greatly advance their utility in dynamic information transformation, high‐capacity storage, advanced encryption, but has proven to be highly challenging. Here, it is reported by programmably integrating newly developed 1D quasi‐periodic folding structures into a 3D crystal, the generated superstructure exhibits distinctive optical effects combine independently manipulatable specular anisotropic diffuse reflections within versatile protein‐based platform, thus creating different channels for imaging. The polymorphic transition of protein format allows facile modulation both patterns lattices and, therefore, superstructure's spectral response each channel. capacity manipulate assembly enables programmable encoding independent single system, which decoded simple adjustment lighting directions. multifunctional platform demonstrated processing, showcasing its ability achieve multimode transformation codes, multi‐code high‐level numerical encryption. present strategy opens new pathways achieving multichannel transformable imaging, thereby facilitating development emerging conversion, encryption media using crystals.

Language: Английский

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Chameleon-inspired adaptive photoreactive polyurethane films for dynamic secure multidimensional “burn-after-reading” encryption

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 505, P. 159316 - 159316

Published: Jan. 6, 2025

Language: Английский

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Size‐Tunable Covalent Organic Framework Nanoparticles for Assembling One‐Dimensional Photonic Crystals With Visual Sensing

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract One‐dimensional photonic crystals (1D PCs) emerged as superb sensing platforms due to their high sensitivity environmental changes. However, effectively translating the microscopic interactions between covalent organic frameworks (COFs) and analytes into macroscopic optical responses via 1D PCs for intuitive detection presents a significant challenge. Here, we propose stepwise‐induced synthesis strategy that first time achieves size‐controlled of uniform nanoscale COFs (60–80 nm), leading high‐quality COF layer. This advancement enables COF‐based exhibit diverse color variations controllable saturation. Notably, excellent compatibility layer with inorganic oxides, polymers, metal‐organic (MOFs) results in these exhibiting bright colors. Crucially, introducing mesoporous materials achieve deep integration adsorption recognition functions volatile compounds (VOCs). The fabricated COF/MOF PC allows differentiation 12 VOCs visually detects at different concentrations (0–80 g m − 3 ) through changes, response under 1 s. In particular, can be transferred flexible substrates while retaining VOC visual sensing. These attributes highlight potential real‐time monitoring industrial environments.

Language: Английский

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2D/3D Geometric Multiplexing via Orthogonal Control of Circularly Polarized Transmission and Long Afterglow Imaging

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Multiplexed optical imaging is highly desirable for enhancing information security. However, shaping optically active materials with circularly polarized long afterglow (CPLA) into 3D geometric structures multiplexing stereoscopic display and multidirectional encryption remains a significant challenge. Herein, novel strategy proposed designing multiplexed patterns using twisted‐stacking hierarchical that exhibit remarkable activity CPLA properties. The hybrid films dynamically orthogonal control of transmission in daylight switchable images darkness, both which can be directly viewed by the naked eye left‐ or right‐handed filters, independently modulated without mutual interference during dynamic regulation process. Furthermore, it demonstrated this integrated platform utilized as multimodal image toward advanced anti‐counterfeiting applications.

Language: Английский

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Bioinspired Microhinged Actuators for Active Mechanism‐Based Metamaterials

Advanced Science, Journal Year: 2024, Volume and Issue: 12(2)

Published: Nov. 18, 2024

Abstract Mechanism‐based metamaterials, comprising rigid elements interconnected by flexible hinges, possess the potential to develop intelligent micromachines with programmable motility and morphology. However, absence of efficient microactuators has constrained ability achieve multimodal locomotion active shape‐morphing behaviors at micro nanoscale. In this study, inspiration from flight mechanisms tiny insects is drawn a biomimetic microhinged actuator integrating compliant soft hydrogel muscle. A Pseudo‐Rigid‐Body mechanical model introduced analyze structural deformation, demonstrating that hydrogel‐based microactuator can undergo significant folding while maintaining high stiffness. Furthermore, multiple actuators are combined facilitate in degrees freedom arbitrary directions. Fabricated multi‐step four‐dimensional (4D) direct laser writing technique, integrated into 2D 3D metamaterials enabling programable shape morphing. Additionally, micro‐kirigami photonic structures demonstrated show pattern transforming actuated microhinges. This bioinspired design approach opens new avenues for development mechanism‐based capable intricate behaviors.

Language: Английский

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Chromogenic Photonic Crystal Detectors for Monitoring Small Molecule Diffusion at Solid–Solid Interfaces Using Stimuli-Responsive Shape Memory Polymers

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 2238 - 2249

Published: Dec. 17, 2024

In situ monitoring of small molecule diffusion at solid–solid interfaces is challenging, even with sophisticated equipment. Here, novel chromogenic photonic crystal detectors enabled by integrating bioinspired structural color stimuli-responsive shape memory polymer (SMP) for detecting trace amounts interfacial are reported. Colorless macroporous SMP membranes deformed macropores can recover back to the "memorized" microstructures and corresponding iridescent colors when triggered diffused molecules. Systematic experimental theoretical investigations using various microscopes, optical spectroscopy modeling, spatio-resolved energy-dispersive X-ray spectroscopy, calculations confirm diffusion-induced mechanisms. Importantly, proof-of-concept sensing temporospatial-resolved bioactive ingredients used in drug delivery, including anti-inflammatory methyl salicylate pain relieving patches vitamin E barriers loaded contact lens, phthalates plasticizers commercial PVC products has been demonstrated. These innovative inexpensive, reusable, easy operate deploy both qualitative quantitative analyses, promising opening new avenues biomedical research, threat detection, plastics, food, environmental safety. Moreover, reconfigurable crystals micrometer-scale resolution, which great importance tunable integrated nanooptics, be fabricated diffusion-enabled microcontact printing.

Language: Английский

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