Bioinspired Stretchable Polymers for Dynamic Optical and Thermal Regulation

Advanced Energy and Sustainability Research, Год журнала: 2024, Номер 5(5)

Опубликована: Янв. 31, 2024

Elaborated optical and thermal modulatory systems are of great importance to the survival evolution organisms in nature. Inspired by these natural intelligent systems, researchers have made efforts for developing stretchable polymers exploring their applications fields communication, dynamic camouflage, management, others. Herein, an up‐to‐date account advancements bioinspired regulation is provided. First, structural colors presented, including cholesteric liquid crystal elastomers, photonic emerging polymers. Then infrared emissivity introduced, which achieved stretch‐induced wrinkled‐flat surface or cracked surface. Third, management discussed, focusing on tunable solar transmittance radiative cooling. Moreover, perspectives opportunities challenges future research directions presented at end.

Язык: Английский

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4D Encryption System: Hydrophilic–Hydrophobic Polyurethane Actuators with Smart Color Switching for High‐Capacity Data Storage

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Abstract Natural communication methods have influenced the creation of sophisticated artificial materials capable coherent and abundant responses to stimuli, a crucial necessity for developing applications such as dynamic encryption systems high‐density information storage. However, existing storage are limited by predictable, single‐stimulus lack capacity dynamic, continuous, programmable changes. To address this gap, bioinspired multicolor fluorescent polyurethane actuator is developed that combines color shape adaptability within single material platform. This smart mimics turgor‐driven movements Oxalis corniculata through hydrophilic/hydrophobic network enables water diffusion, hydrogen bonding, bond exchange. It responds multiple including temperature, pH, excitation wavelength, exhibiting reversible multi‐state deformations fluorescence across red, green, blue, even white light. The deformation behavior supported finite element simulations, ensuring precise control predictability. Additionally, tunable trichromatic underpins 3D 4D encoding system, demonstrating increased security. employment micro‐processing technology in fabrication micro‐hidden optical chips has been demonstrated, thus paving way underwater technologies adaptive materials.

Язык: Английский

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Structural color: an emerging nanophotonic strategy for multicolor and functionalized applications

Opto-Electronic Science, Год журнала: 2025, Номер 0(0), С. 240030 - 240030

Опубликована: Янв. 1, 2025

Язык: Английский

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Manipulation of Photonic Jets of Topological Gratings Comprising ITO Strips and Nanowalls Using Refractive Indices of Dielectric Nanofilms

Laser & Photonics Review, Год журнала: 2023, Номер 18(2)

Опубликована: Окт. 18, 2023

Abstract This work proposes a quick measurement of the refractive index dielectric nanofilm via fabricated topological grating that comprises indium tin oxide (ITO) strips and nanowalls with an extremely high aspect ratio 25. As is capped nanofilm, parabolic fields destructively interfere those ITO strips. destructive interference weakens photonic jets grating, decreasing its diffraction efficiency. The decrease in efficiency determines without measuring thickness advance because independent thickness. In other words, are manipulated by nanofilm. experimental results verify indices titanium‐dioxide, silicon‐dioxide, bovine‐serum‐albumin nanofilms much smaller than visible wavelengths can be measured using proposed grating. Therefore, gratings have great potential to develop advanced materials, fascinating devices, innovative instruments.

Язык: Английский

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2D-to-3D buckling transformability enabled reconfigurable metamaterials for tunable chirality and focusing effect

Photonics Research, Год журнала: 2023, Номер 11(10), С. 1770 - 1770

Опубликована: Авг. 21, 2023

Recently, multifarious deformation approaches in nature have promoted dynamic manipulation for electromagnetic (EM) waves metamaterials, and those representative strategies are mainly focused on the modulation of spectral parameters. Several works also achieved tunable phase-gradient meta-devices. Here, to broaden freedom mechanical deformation, we initially propose two reconfigurable metamaterials consisting mirrored S-shaped meta-atoms selectively bonded biaxially pre-stretched substrates. Planar with spin-insensitive transmittance buckled into 3D morphologies break residual symmetries by releasing stress facilitate spin-dependent under circularly polarized incidence. Owing geometric anisotropy along x y axes, chiral exhibit discriminate cross-polarized opposite spins. The underlying physical mechanism reveals that EM resonance originates from excitation electric dipoles magnetic dipoles, their cross coupling finally triggers effects meta-atoms. By introducing gradient-phase design keeps unchanged various strains, types specified orientations interleaved a double-foci metalens, its 2D-to-3D morphology transformation shortens focusing length facilitates intensity change foci. Our approach designing buckling transformability can be further extended toward terahertz even optical wavebands, it may assist deriving more applicable multi-functionalities aspects imaging, sensing, holograms.

Язык: Английский

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An investigation into multidimensional information encryption through structural color in electrically responsive subwavelength gratings

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 663, С. 880 - 890

Опубликована: Фев. 24, 2024

Язык: Английский

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Nanograting-Based Dynamic Structural Colors Using Heterogeneous Materials

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Ноя. 11, 2024

Dynamic structural colors can change in response to different environmental stimuli. This ability remains effective even when the size of species responsible for color is reduced a few micrometers, providing promising sensing mechanism solving microenvironmental problems micro-robotics and microfluidics. However, lack dynamic that encode rapidly, easily integrate, accurately reflect changes physical quantities hinders their use microscale applications. Herein, we present 2.5-dimensional based on nanogratings heterogeneous materials, which were obtained by interweaving pH-responsive hydrogel with an IP-L photoresist. Transverse gratings printed hydrogels elongated period longitudinal grating swollen state, resulting pH-tuned at 45° incidence. Moreover, patterned encoding array printing achieved using grayscale stripe images periods heights nanogrid structures. Overall, networks exhibit potential applications information encryption situ microfluidic chips.

Язык: Английский

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A Review of Kirigami/Origami Metasurfaces for Controlling Electromagnetic Waves

Annalen der Physik, Год журнала: 2024, Номер unknown

Опубликована: Сен. 10, 2024

Abstract Advanced kirigami/origami techniques have enabled the flexible transformation of planar patterns into exquisite three‐dimensional (3D) structures and provided a new paradigm to control electromagnetic waves with remarkable reconfigurability functionality. The practical applications metasurfaces are prospective due their diversified wave‐manipulation capabilities, which demonstrate advantages such as compactness, lightweightness, deployability, scalability. In this article, comprehensive overview most recent advancements in field is provided. This includes concept kirigami/origami, implementations meta‐structures, application aspects waves. conclusion, future challenges promising pathways also envisioned from own perspectives.

Язык: Английский

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Femtosecond Bessel laser beam induced concentric rings on SiC for circular symmetry wide-viewing angle structural color

Optics & Laser Technology, Год журнала: 2024, Номер 181, С. 111813 - 111813

Опубликована: Сен. 17, 2024

Язык: Английский

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Ionic Microgel Colloidal Crystals: Responsive Chromism in Dual Physical and Chemical Colors for High-End Information Security and Encryption

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(28), С. 33985 - 33997

Опубликована: Июль 7, 2023

Chromic materials play a decisive and escalating role in information security. However, it is challenging to develop chromic for encryption technologies that can hardly be imitated. Inspired by versatile metachrosis nature, series of coumarin-based 7-(6-bromohexyloxy)-coumarin microgel colloidal crystals (BrHC MGCC) with multiresponsive chromism are able assembled ionic microgels poly(vinyl alcohol) (PVA) solution followed two cycles freezing–thawing. The finely tailored situ quaternization tunable size under varied temperatures hydration energies counterions as well quenched luminescence UV irradiation, which endows BrHC MGCC intriguing the dual-channel coloration physical structural color chemical fluorescent color. Three types exhibit various change ranges similar quenching fluorescence emission, utilized development static–dynamic combined anticounterfeiting system dual coloration. conveyed array presents dynamic variation versus temperature, while static only integrally read both sunlight 365 nm lamp. fabrication crystal opens facile ecofriendly window multilevel security, camouflage, cumbersome authentication process.

Язык: Английский

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