Simultaneous light-triggered formation of polymer microspheres and enhancement of electrohydrodynamic instabilities in a cholesteric liquid crystal system for bistable device

Journal of Molecular Liquids, Год журнала: 2025, Номер unknown, С. 126926 - 126926

Опубликована: Янв. 1, 2025

Язык: Английский

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Dual-Mode Multicolor Display Based on Structural and Fluorescent Color CdS Photonic Crystal Hydrogel

Langmuir, Год журнала: 2024, Номер 40(24), С. 12767 - 12777

Опубликована: Июнь 6, 2024

In this study, we prepared a multicolor structural–fluorescent CdS–PEGDA photonic crystal hydrogel (SFC-CPH) with dual display mode, which has two different optical states: structural color mode and fluorescent mode. SFC-CPH displays under visible light ultraviolet light. Initially, monodisperse CdS colloidal particles were synthesized via hydrothermal method, leading to the self-assembly of template. The high refractive index contributes crystals' low-angle dependence vivid colors. Then, variety molecules doped into poly(ethylene glycol) diacrylate (PEGDA) combined crystals distinct colors prepare three SFC-CPH. We also investigated characteristics surface properties these hydrogels. Based on dual-mode characteristics, designed several patterns method for information encoding. unique property material suggests its substantial potential applications in storage, security, encoding, offering innovative avenues realm display.

Язык: Английский

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Physical and Chemical Preparation Techniques and Applications of Photonic Crystals: A Review

Crystals, Год журнала: 2025, Номер 15(2), С. 124 - 124

Опубликована: Янв. 24, 2025

Photonic crystals, which are important functional materials, formed by the periodic arrangement of materials with different dielectric constants that have photonic bandgaps and localization properties. Their preparation methods primarily physical chemical. Physical include mechanical drilling, layer-by-layer stacking, precision processing. Chemical involve colloidal self-assembly methods. Various crystal been reported, each its own advantages disadvantages. crystals applications in many fields, such as optical communications, information technology, energy, biomedicine, sensors, including high-performance fiber fabrication, chip development, solar cell efficiency enhancement. This paper reviews latest progress using Currently, application made significant achievements; however, there still challenges terms accuracy, efficiency, cost, integration technology. With future development science breakthroughs expected novel structural process optimization, cross-field integration, will continue to promote social development.

Язык: Английский

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Synergistic Hydrophilic and Electrostatic Induction for Liquid Photonic Crystals of Poly (Acrylic Acid)‐block‐Polystyrene Colloidal Nanospheres From RAFT‐Mediated Emulsion Polymerization

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract Liquid Photonic Crystals (LPCs) represent a distinctive category of photonic materials that merges the ordered structure colloidal crystals with dynamic nature liquids, allowing for flexibility in tuning their assembly and optical properties response to external stimuli. However, requirement high solid content stability these LPCs continue pose significant challenge controlled synthesis, efficient assembly, system stabilization. Herein, highly charged poly (acrylic acid)‐ b ‐polystyrene (PAA‐ ‐PS) nanospheres are synthesized using RAFT‐mediated emulsion polymerization. Under hydration electrostatic interactions induced by selected polymeric inducers, PAA‐ ‐PS uniform carboxylate anion surface synthesized, capable forming iridescent at an overall low (20 wt%) containing localized areas content. Furthermore, carboxymethyl cellulose (CMC), one undergoes photosensitive modification facilitate digital light processing (DLP) 3D printed hydrogel models. This strategy offers innovative approaches 3D‐printed LPC materials, promising applications smart displays, sensory systems, devices.

Язык: Английский

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Efficient Synthesis of Liquid Photonic Crystal by Electrically-driven Colloid Concentration

Опубликована: Фев. 28, 2025

Article Efficient Synthesis of Liquid Photonic Crystal by Electrically-Driven Colloid Concentration Xiaodong Lu 1,†, Huimin Zhu Sheng Chen 1, Ximeng Lv and Jianping Ge 1,2,* 1 State Key Laboratory Petroleum Molecular & Process Engineering, Shanghai Green Chemistry Chemical Processes, School East China Normal University, 200062, 2 Institute Eco-Chongming, 202162, * Correspondence: [email protected] † These authors contributed equally to this work. Received: 9 January 2025; Revised: 19 February Accepted: 21 Published: 28 2025 Abstract: photonic crystal (LPC) is a promising new material in the field sensing, display, printing, coating due its unique fluidity, metastability, reversibility colloidal assembly. However, it big challenge prepare LPC materials an efficient, controllable, eco-friendly way. In work, electrically-driven colloid concentration process was developed for efficient synthesis LPC. The key that electrophoretic produced locally concentrated but “agglomeration-free” solution, which spontaneously turned after being kept standing few minutes. possessed good universality reproducibility LPCs composed different particles solvents. Its efficiency could be improved tuning particles’ surface charge, dielectric constant viscosity solvent, as well external conditions. More importantly, into large-scale green without chemical wastes compared previous synthetic methods.

Язык: Английский

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In Situ Secondary Growth Method for Dual-Chiral Blue Phase Liquid Crystal Films with Broadly Tunable Hyper-Reflective Photonic Bandgaps

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 14, 2025

Blue-phase liquid crystals (BPLCs) have shown great potential in hyper-reflective display technology due to their narrow bandgap, high color saturation, and fast response characteristics. However, there remains a significant challenge for achieving open-patternable dual-chiral BPLC films (DH-BP) precise tuning efficient hyper-reflection the packaging limitations of crystal cells complexities dynamic bandgap matching principle. In this study, an situ secondary growth strategy was proposed successfully fabricate structurally continuous uniform DH-BP films. Key factors affecting uniformity were thoroughly analyzed, including optimization material structure, surface modification polymer template, control thickness. Subsequently, inkjet printing ink diffusion swelling techniques employed achieve films, with tunable range approximately 109 nm (from 576 467 nm), maximum reflectivity up 97%. Finally, multi-information encryption by integrating color, polarization, hyper-reflection. The method provides new insights into design high-saturation, high-reflection displays has broad application prospects energy-efficient security technologies.

Язык: Английский

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Regulating Growth of Strontium Carbonate in Self-Assembled Chiral Chitin Matrices with Robust Mechanical Properties

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

The exoskeleton of arthropods exhibits a Bouligand structure, composed chitin matrix and calcium carbonate crystals, which confer exceptional mechanical properties. While many studies focus on the relationship between structure performance, few investigate mineral growth process within matrix. Here, chiral films are prepared through evaporation-induced self-assembly nanowhiskers, subsequently incubated in SrCO3 mineralizing solution. Initially, precursors deposit film surface transform into mineralized points, then radially expand outward along propagate inward until coalescing continuous layer. rate these points is significantly enhanced by increasing reaction temperature; at 60 °C, 13 times faster (650.4 μm2/min) compared to that 25 °C (49.7 μm2/min). Finally, SrCO3/chitin composite bulks fabricated stacking hot-pressing multiple films, adhered using sodium alginate (SA) solution spin coating. resulting SrCO3/chitin@SA composites exhibit bending strength 64.2 MPa, representing 27% increase over pure bulk 105% bulk. Our work provides strategy for low-temperature fabrication high-performance artificial composites.

Язык: Английский

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Matrix-induced defects and molecular doping in the afterglow of SiO2 microparticles

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 16, 2024

A deep understanding of how the host matrix influences afterglow properties molecule dopants is crucial for designing advanced materials. Despite its appeal, impact defects on performance in molecule-doped SiO

Язык: Английский

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Shaping in the Third Direction: Colloidal Photonic Crystals with Quadratic Surfaces Self-Assembled by Hanging-Drop Method

Polymers, Год журнала: 2024, Номер 16(13), С. 1931 - 1931

Опубликована: Июль 6, 2024

High-quality, 3D-shaped, SiO2 colloidal photonic crystals (ellipsoids, hyperboloids, and others) were fabricated by self-assembly. They possess a quadratic surface are wide-angle-independent, direction-dependent, diffractive reflection crystals. Their size varies between 1 5 mm can be achieved as mechanical-resistant, free-standing, thick (hundreds of ordered layers) objects. polystyrene inverse-opal superstructures (highly similar to diatom frustules) synthesized using an inside infiltration method reflective diffraction multiple bands given their special architecture (a torus on the top ellipsoid) different sized holes (384 nm 264 nm). Our hanging-drop self-assembly approach uses setups which deform shape ordinary spherical drop; thus, takes place non-axisymmetric liquid/air interface. The deformed drop is kind topological interface changes its in time, remaining quality template for process. Three-dimensional-shaped might used devices future spectrophotometers, aspheric or freeform diffracting mirrors, metasurfaces experiments regarding space-time curvature analogy.

Язык: Английский

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Dual-Mode Multicolor Display Based on Structural and Fluorescent Color Cds-Pegda Photonic Crystal Hydrogel

Опубликована: Янв. 1, 2024

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Язык: Английский

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