Structural Color Colloidal Photonic Crystals for Biomedical Applications

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 31, 2024

Photonic crystals are a new class of optical microstructure materials characterized by dielectric constant that varies periodically with space and features photonic bandgap. Inspired natural such as butterfly scales, series artificial developed for use in integrated platforms, biosensing, communication, other fields. Among them, colloidal (CPCs) have gained widespread attention due to their excellent properties advantages, ease preparation functionalization. This work reviews the classification self-assembly principles CPCs, details some latest biomedical applications large-area, high-quality CPCs prepared using advanced methods, summarizes existing challenges CPC construction application, anticipates future development directions optimization strategy. With further advancements, expected play more critical role biosensors, drug delivery, cell research, fields, bringing significant benefits research clinical practice.

Language: Английский

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Achieving Optical Refractive Index of 10‐Plus by Colloidal Self‐Assembly

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: July 31, 2024

This study demonstrates the developments of self-assembled optical metasurfaces to overcome inherent limitations in polarization density (P) and high refractive indices (n) within naturally occurring materials. The Maxwellian macroscopic description establishes a link between P n, revealing static limit natural materials, restricting n ≈4.0 at frequencies. Previously, it is accepted that self-assembly enables creation nanogaps metallic nanoparticles (NPs), boosting capacitive enhancement resultant exceptionally work focuses on assembling gold (Au) NPs into closely packed monolayer by rationally designing polymeric ligand balance attractive repulsive forces, brush-mediated close-packed Au NP robustly achieved over large-area. resulting nanospheres (NSs), nanooctahedras (NOs), nanocubes (NCs) exhibits integrity crystallinity, sufficiently enough for pushing record-high regimes. systematic comparisons each differently shaped monolayers elucidate significance coupling achieving an unnaturally n. 10.12 frequencies stands as benchmark, highlighting potential polyhedral advancing metasurfaces.

Language: Английский

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pH- and Anion-Responsive Poly(1-vinylimidazole) Opal Films for Smart Sensing

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 4, 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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Integration of high refractive index sulfonated polystyrene opals with aptamers for rapid testing of neuron-specific enolase

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: 305, P. 141079 - 141079

Published: Feb. 15, 2025

Language: Английский

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Structural color palettes from colloidal color mixing

Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

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Synergistic Double‐Layer Mechanochromic Polymers for Enhanced Strain Sensing and Emission Control

Macromolecular Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Abstract The development of mechanochromic polymers offers transformative potential for applications requiring real‐time stress sensing and emission control. This study presents a novel double‐layer polymer system that synergistically combines high‐quantum‐yield fluorophore‐based emissive layer perylene bisimide‐derived optical filter to achieve exceptional performance. utilizes pyrene‐functionalized polyolefins produce strain‐induced fluorescence shift, while the modulates intensity through absorption dilution effects upon deformation. Comprehensive mechanical characterization reveals combination poly(styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) (SEBS)‐based filters with poly(ethylene‐co‐octene) functionalized 1‐Pyrenemethylamine (POE‐g‐AMP) layers delivers most pronounced strain‐dependent enhancement, achieving 120% increase in at 250% elongation. work overcomes traditional limitations mechanophore adoption by utilizing cost‐effective materials scalable processing techniques. proposed demonstrates sensitivity versatility, paving way innovative structural health monitoring, wearable sensors, dynamic design materials.

Language: Английский

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Atomic-engineered gradient tunable solid-state metamaterials

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(39)

Published: Sept. 18, 2024

Metamaterial has been captivated a popular notion, offering photonic functionalities beyond the capabilities of natural materials. Its desirable functionality primarily relies on well-controlled conditions such as structural resonance, dispersion, geometry, filling fraction, external actuation, etc. However, its fundamental building blocks-meta-atoms-still rely naturally occurring substances. Here, we propose and validate concept gradient reversible atomic-engineered metamaterials (GRAM), which represents platform for continuously tunable solid metaphotonics by atomic manipulation. GRAM consists an heterogenous interface amorphous host noble metals at bottom, top was designed to facilitate movement foreign atoms. Continuous changes in GRAM's refractive index structures are observed presence thermal field. We achieve multiple optical states varying temperature time demonstrate GRAM-based nanophotonic devices visible spectrum. Further, high-efficiency programmable laser raster-scanning patterns can be locally controlled adjusting power speed, without any mask-assisted or complex nanofabrication. Our approach casts distinct, multilevel, postfabrication recipe modify material's properties scale, opening avenues materials engineering, information storage, display, encryption, well advanced optics photonics.

Language: Английский

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Layer‐By‐Layer Shear‐Printing of Bulk Mechanoresponsive Photonic Crystals

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

Published: Dec. 25, 2024

Abstract Mechanoresponsive photonic crystals (MPCs) exhibit tunable optical properties and hold great promise for a wide range of applications. However, fabricating them in bulk form remains significant challenge. In this study, novel approach is presented producing MPCs with enhanced properties. By incorporating shear‐ordering into the 3D molding process, study successfully fabricates that display bright, saturated structural colors 80% reflectance. The are constructed layer‐by‐layer via successive shear‐printing using colloidal particles embedded photocurable resins. Each layer subjected to oscillatory shear facilitated by modified printing setup. This process creates highly ordered face‐centered cubic lattice structure throughout material. final product exhibits distinct on its various faces, depending planes exposed at different orientations. material strain‐resilient, pronounced color shifting response applied stress. A detailed experimental mechanism resulting structures provided. method offers an efficient way fabricate performance comparable best thin films can be extended more complex shapes.

Language: Английский

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