Photo-triggered full-color circularly polarized luminescence based on photonic capsules for multilevel information encryption

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 25, 2023

Materials with phototunable full-color circularly polarized luminescence (CPL) have a large storage density, high-security level, and enormous prospects in the field of information encryption decryption. In this work, device-friendly solid films color tunability are prepared by constructing Förster resonance energy transfer (FRET) platforms chiral donors achiral molecular switches liquid crystal photonic capsules (LCPCs). These LCPCs exhibit photoswitchable CPL from initial blue emission to RGB trichromatic signals under UV irradiation due synergistic effect chirality show strong time dependence because different FRET efficiencies at each node. Based on these response characteristics, concept multilevel data using LCPC is demonstrated.

Language: Английский

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Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: July 14, 2022

Chiral nanomaterials with intrinsic chirality or spatial asymmetry at the nanoscale are currently in limelight of both fundamental research and diverse important technological applications due to their unprecedented physicochemical characteristics such as intense light-matter interactions, enhanced circular dichroism, strong circularly polarized luminescence. Herein, we provide a comprehensive overview state-of-the-art advances liquid crystal-templated chiral nanomaterials. The chiroptical properties touched, design principles bottom-up synthesis strategies discussed. Different functional based on liquid-crystalline soft templates, including plasmonic luminescent nanomaterials, systematically introduced, underlying mechanisms, properties, potential emphasized. This review concludes perspective emerging applications, challenges, future opportunities fascinating can not only deepen our understanding fundamentals soft-matter chirality, but also shine light development advanced toward versatile optics, biology, catalysis, electronics, beyond.

Language: Английский

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Circularly polarized luminescent self‐organized helical superstructures: From materials and stimulus‐responsiveness to applications

Aggregate, Journal Year: 2021, Volume and Issue: 2(6)

Published: Oct. 22, 2021

Abstract Circularly polarized luminescence (CPL) has gained considerable attention in various systems and rapidly developed into an emerging research field. To meet the needs of actual applications diverse fields, a high dissymmetry factor ( g lum ) tunable optical performance CPL would be most urgent pursuit for researchers. Accordingly, many materials strategies have been to address these critical issues. Emissive cholesteric liquid crystals (CLCs), that is, luminescent self‐organized helical superstructures, are considered ideal candidates constructing CPL‐active materials, as they not only exhibit values, but also enable flexible control CPL. This review mainly summarizes characteristics based on CLCs bulk phase doped with different emitters, including aggregated induced emission molecules, conventional organic small polymer metal–organic complex nanoparticles. In addition, recent significant progress stimulus‐responsive emissive terms several types stimuli, light, electricity, temperature, mechanical force, multiple stimuli is presented. Finally, short perspective opportunities challenges associated CLC field provided. anticipated offer new insights guidelines developing CLC‐based broader applications.

Language: Английский

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Circularly polarized luminescence in chiral orientationally ordered soft matter systems

Deleted Journal, Journal Year: 2023, Volume and Issue: 1(1)

Published: July 23, 2023

Abstract Circularly polarized luminescent (CPL) materials have received significant attention in the field of fundamental science recently. These offer substantial advancement technological applications, such as optical data storage, displays, and quantum communication. Various strategies been proposed self‐assembled consisting inorganic, organic, hybrid systems, particularly chiral orientationally ordered soft matter systems (e.g., liquid crystals (LCs) LC polymers). However, developing scientific approaches to achieve pronounced steerable circularly light emission remains challenging. Herein, we present a comprehensive review on recent development CPL based LCs, including thermotropic LCs (cholesteric bent‐core LCs), lyotropic (nanocellulose polyacetylene‐based polymers LC‐based polymers, helical nanofibers, network). In addition, mechanisms, design principles, potential applications these are systematically reviewed. This summarizes with prospect latent challenges, which can strengthen our understanding basic principles provide new insight into progress several fields, chemistry, science, optics, electronics, biology.

Language: Английский

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Circularly polarized perovskite luminescence with dissymmetry factor up to 1.9 by soft helix bilayer device

Matter, Journal Year: 2022, Volume and Issue: 5(7), P. 2319 - 2333

Published: May 31, 2022

Language: Английский

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Structural Color from Cellulose Nanocrystals or Chitin Nanocrystals: Self-Assembly, Optics, and Applications

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(23), P. 12595 - 12756

Published: Nov. 27, 2023

Widespread concerns over the impact of human activity on environment have resulted in a desire to replace artificial functional materials with naturally derived alternatives. As such, polysaccharides are drawing increasing attention due offering renewable, biodegradable, and biocompatible feedstock for nanomaterials. In particular, nanocrystals cellulose chitin emerged as versatile sustainable building blocks diverse applications, ranging from mechanical reinforcement structural coloration. Much this interest arises tendency these colloidally stable nanoparticles self-organize water into lyotropic cholesteric liquid crystal, which can be readily manipulated terms its periodicity, structure, geometry. Importantly, helicoidal ordering retained solid-state, an accessible route complex nanostructured films, coatings, particles. review, process forming iridescent, structurally colored films suspensions (CNCs) is summarized mechanisms underlying chemical physical phenomena at each stage explored. Analogy then drawn (ChNCs), allowing key differences critically assessed strategies toward coloration presented. progress translating technology academia industry summarized, unresolved scientific technical questions put forward challenges community.

Language: Английский

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Recent Progress in Liquid Crystal‐Based Smart Windows: Materials, Structures, and Design

Laser & Photonics Review, Journal Year: 2022, Volume and Issue: 17(1)

Published: Nov. 30, 2022

Abstract As the vital elements for building environments, windows are utilized to bring light as well thermal irradiation into interior places and afford medium communication between exterior of buildings. Liquid crystal (LC)‐based smart windows, which mainly made LC materials or polymer/LC composites, can dynamically modulate transmittance regulate heat radiation entering buildings from sun via orientation variation molecules. Such play an important role in intelligent energy conservation, contributes providing a more comfortable low‐energy‐consumption living environment mankind. In this review, recent progress LC‐based each category is overviewed. New materials, new ideas, methods improve performance conventional create novel window technologies outlined. Different advanced technologies, including electrochromism, thermochromism, photochromism, humidity‐triggered chromism, mechanical self‐powered technique, dynamic infrared regulating mechanisms, discussed systematically. The applications indoor illumination/privacy protection switching, human‐machine interaction, regulation highlighted. Last, challenges perspectives also provided.

Language: Английский

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Polymer‐Based Circularly Polarized Luminescent Materials

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(6)

Published: Jan. 19, 2023

Abstract Chiral materials capable of generating circularly polarized luminescence (CPL) have gained rapidly growing research interest by virtue their peculiar photophysical characteristics and far‐reaching applications. Amongst various CPL materials, polymer‐based constituted an important class owing to abundant types, ease manufacture, high thermal stability, as well as, tunable properties. The present work reviews the latest advances in constructing which are classified based on interaction modes between chiral luminescent components, that is, covalent interaction, non‐covalent without interactions. newly emerging categories nonconventional fluorescence‐based room temperature phosphorescence, with thermally activated delayed fluorescence properties also presented. Typical applications emitters organic light‐emitting diodes, information security encryption, optical sensors further discussed. Additionally, current challenges future perspectives this field summarized. This review article is expected stimulate more unprecedented achievements derived from thus promoting practical

Language: Английский

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Liquid Crystals Doped with Chiral Fluorescent Polymer: Multi‐Color Circularly Polarized Fluorescence and Room‐Temperature Phosphorescence with High Dissymmetry Factor and Anti‐Counterfeiting Application

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: July 28, 2023

Chiral nematic liquid crystals (N*-LCs) can tremendously amplify circularly polarized luminescence (CPL) signals. Doped emissive N*-LCs have been substantially explored. However, their CPL performances still need to be improved, mainly due the unsatisfying helical twisting power (HTP) of commonly used chiral fluorescent dopants. polymers (CFHPs) outstanding optical activity and performance. The present contribution reports first success in constructing by doping CFHP into (5CB, N-LCs). assembly structures effectively signals CFHP. Owing high HTP CFHP, selective reflection band N*-LC adjusted fully cover its emission band. A nearly pure with a dissymmetry factor (glum ) up -1.87 is realized at 9 wt% concentration. Taking advantage mechanism, multi-color CPL-active glum are fabricated via further adding achiral fluorophores. Also noticeably, room-temperature phosphorescence -1.57 achieved. Anti-counterfeiting application demonstrated exploiting multi-mode characteristics created N*-LCs. established strategy for provides platform future exploring

Language: Английский

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Circularly polarized luminescence of coordination aggregates

Aggregate, Journal Year: 2022, Volume and Issue: 3(5)

Published: Feb. 11, 2022

Abstract The development and applications of materials with efficient circularly polarized luminescence (CPL) have become an interdisciplinary frontier research topic. We summarize herein the recent advance in CPL‐active aggregates based on metal‐ligand coordination (termed as “coordination aggregates”). surveyed are classified small‐molecular metal complexes, which include monocomponent assemblies Pt(II) complexes other binary helicates, polymers, frameworks. efforts improving dissymmetry factors quantum yields these use aggregation strategy enhancing performance isolated molecules discussed. chiral organic light‐emitting diodes (OLEDs) solution‐ or evaporation‐processed procedures surveyed. In addition, uses lanthanide CPL‐contrast imaging CPL probes highlighted. common discussion mechanism aggregation‐enhanced CPLs a perspective future works finally given.

Language: Английский

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