Tunable and Responsive Circularly Polarized Luminescence of Self‐Organized Cellulose Nanocrystal Chiral Superstructures Loaded with AIE Luminogen

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Abstract Circularly polarized luminescence (CPL) holds great potential for next‐generation display techniques. However, dynamic, multicolor CPL with high luminescent quantum yield (PLQY) and tunable dissymmetry factor ( g lum ) based on cost‐effective, sustainable materials is scarcely attainable. Herein, a straightforward approach proposed engineering cellulose nanocrystal (CNC) chiral superstructures loaded aggregation‐induced emission luminogens (AIEgens) through the evaporation‐induced self‐assembly of renewable CNCs tetra‐(4‐pyridylphenyl)ethylene molecules. The judicious design two building blocks as donor–acceptor pairs not only respectively achieves an 86‐fold 2.1‐fold improvement in PLQY resulting systems suspension aggregate states comparison bare AIEgens, but also endows AIEgen‐loaded CNC pH‐tunable, humidity‐responsive, maximal | 0.89. It revealed that induction photonic bandgap effects—which are dominated by interactions homogeneous or heterogeneous processes—are involved mechanisms. Finally, humidity‐responsive multiple changes (structural color, fluorescent CPL) realized both biobased inks films, which paramount importance applications dynamic information encryption. This work offers underlying insights construction dynamically CPL.

Language: Английский

---

Ultraviolet Circularly Polarized Luminescence: Progress in Chiral Materials and Emerging Applications

Journal of Luminescence, Journal Year: 2025, Volume and Issue: 280, P. 121127 - 121127

Published: Feb. 11, 2025

Language: Английский

---

Ultrasound-assisted Zn-doped CsPbCl3 perovskite nanocrystals through Mn co-doping approach with bright luminescence and stability

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116823 - 116823

Published: Feb. 1, 2025

Language: Английский

---

Dynamic Structural Colors in Helical Superstructures: from Supramolecules to Polymers

Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Language: Английский

---

Semiconducting Liquid Crystalline Dispersions with Precisely Adjustable Band Gaps and Polarized Photoluminescence

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Simultaneously possessing energy conversion properties and reconfigurable anisotropic structures due to their fluidity, semiconducting liquid crystals are an emerging class of soft materials for generating detecting polarized photons. However, band-gap engineering crystalline substances remains challenging. Herein, exhibiting discotic nematic ordering, linearly monochromatic photoluminescence or broadband white-light emission, polarization-dependent light-responsiveness (generation photons photocurrents) were systematically developed by transforming two-dimensional organic-inorganic metal halide perovskites into mesogenic colloidal nanoparticles. The emission wavelengths the perovskite could be adjusted with accuracy 5 nanometers over a wide range in visible region compositional variations, indicating possibility fabricating light-emitting optoelectronic devices desired band gaps using these materials.

Language: Английский

---

Strengthening Liquid Crystal Elastomer Muscles

Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: 58(6), P. 907 - 918

Published: March 5, 2025

ConspectusLiquid crystal elastomer fibers (LCEFs) are reversible artificial muscles capable of stimuli-responsive functions, making them promising competitors for ideal soft actuators. These remarkable actuation properties depend strongly on their mechanical properties, such as elastic modulus and breaking stress. It is necessary to strengthen the LCEF meet demands advanced applications. However, despite significant progress in LCEFs, there currently no Account systematically summarizing analyzing strategies adopted enhancing properties. The intuitive variations among different enhancement further call investigations into how choose most suitable ones based specific situations. In this Account, first time, we summarize existing approaches strengthening LCEF-based muscles, contributing development more robust smarter fibrous muscles.In section, focus latest valuable highlighting need a comprehensive summary various utilized. LCEFs can be tailored through molecular design, physical interactions, fiber integration. adjustment hard/soft segment features, introduction additional microstructures, integration provide opportunities which discussed second section. Subsequently, delve impact preparation methods performance fabricated by spinning alignment techniques exhibited rather This has been engineer novel, stronger, described third Moreover, show that incorporation rigid composite materials via coating doping emerged powerful strategy core-shell structures. Such enhancements also introduce multifunctionality LCE-based enrich structure mechanism, elucidated fourth Finally, conclude with critical analysis challenges prospects hoping pave way construction muscles.

Language: Английский

---

Emergent Nonreciprocal Dual Circularly Polarized Luminescence from an Iridescent Cellulose Nanocrystalline Film

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Ubiquitous chirality has attracted increasing attention because of its unique scientific significance. Moreover, circularly polarized (CP) absorption and emission, which are the essential components chiral optics, have received considerable interest from researchers. However, very few studies been conducted on materials with nonreciprocal CP emission that emit light opposite handedness their two surfaces. Here, we present a novel film developed cellulose nanocrystalline (CNC). A sustainable CNC twisted right-handedness to inherent left-handed nematic structure is by rotation-induced dynamic self-assembly strategy; this not only ambidextrously reflects left- right-handed but also clearly exhibits tunable Janus chiroptical activity, i.e., anisotropic Both orientation factor reflected wavelength maximum reflectivity significantly depend rotation rate direction. In particular, for first time shows feature luminescence (CPL) achieved through pH-regulated doping cadmium telluride quantum dots. This rare CPL phenomenon broken reciprocity in highly desired next-generation electronics photonics immense potential.

Language: Английский

---

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

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

Published: March 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.

Language: Английский

---

Single-layer RGB cholesteric liquid crystals for next-generation full-color reflective displays and advanced anti-counterfeiting

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161914 - 161914

Published: March 1, 2025

Language: Английский

---

Visible‐Light‐Actuated Bidirectional Photochromism in Chiral Nanostructures with Multi‐Degree of Freedom

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

Published: Oct. 22, 2024

Abstract Cholesteric liquid crystals (CLCs) with chiral nanostructures take on great significance in light modulation for optical devices, especially involving the features of circularly polarized and dynamic structural colors. However, on‐demand self‐assembly by photoprogramming still remains a challenge that is ascribed to unpredictable variation helical superstructures existing CLCs induced light‐driven switches. Here, novel binary systems are designed construct visible‐light‐actuated multi‐degrees freedom, including adjustable circular polarization, bidirectional photochromism, manipulable photonic bands. Such consist an o ‐fluoroazobenzene‐containing switch inert dopant, whose interaction dominates strategies cooperation or conflict determine CLC handedness as well shift direction selective reflection. Particularly, precise tuning range color tailored programmable twisting power enable diverse paradigms light‐actuated patterning. The unprecedented quantitative manipulation colors offers unique attributes applications information encoding multiplexed communication.

Language: Английский

---