Photo‐Controllable Förster Resonance Energy Transfer Based on Dynamic Chiral Self‐Assembly of Sequence‐Defined Amphiphilic Alternating Azopeptoids

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract Endowing biomimetic sequence–controlled polymers with chiral functionality to construct stimuli‐responsive materials offers a promising approach for innovative chiroptical switch, but it remains challenging. Herein, is reported that the self‐assembly of sequence‐defined amphiphilic alternating azopeptoids generate photo‐responsive and ultrathin bilayer peptoidosomes vesicular thickness ≈1.50 nm diameter around ≈290 nm. The photoisomerization azobenzene moiety facilitates reversible structural transformation from isotropic anisotropic 1D helical nanoribbons (≈80 width) under irradiation UV visible lights, consequently leading chirality expression transfer asymmetric center achiral units. As model deformation‐induced energy transfer, non‐invasive azobenzene‐based Förster resonance system unprecedentedly constructed via introduction fluorescent donor pyrene derivatives sequentially photo‐regulated donor/acceptor ratio, displaying gradient color variation blue yellow (a broad Stokes shift ≈200 nm) high‐efficient efficiency 97.2%. photo‐controllable photoluminescence phenomenon endows these aggregates proof‐of‐concept application on multi‐colored information encryption. This work provides prospective strategy fabricate potential light‐controllable switches.

Язык: Английский

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Research Progress on the Dynamic Color Response Mechanism and Applications of Three-Dimensional Photonic Crystals

Acta Chimica Sinica, Год журнала: 2025, Номер 83(1), С. 72 - 72

Опубликована: Янв. 1, 2025

Язык: Английский

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Bio-inspired multifunctional flexible visual sensors based on structural color materials

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161344 - 161344

Опубликована: Март 1, 2025

Язык: Английский

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Collective and Rapid High Amplitude Magnetic Oscillation of Anisotropic Micropillar Arrays

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Magnetic soft actuators allow high-frequency shape reconfiguration of the micropillar array by rapid rotation an external magnetic field; however, viscoelastic cannot instantaneously reach equilibrium deformation state to minimize moment at a given short time scale, resulting in significant reduction strain amplitude. Herein, we report oscillation without frequency or amplitude programming magnetization direction hard microparticles embedded elastomer. Various oscillatory motions, including bending, twisting, and torsion under time-varying fields, are demonstrated via anisotropic micropillars. Hybridization nanorods composites improves micropillars through synergistic effect. The translation microscopic motion into macroscopic function is achieved large-amplitude magnetically programmable collective array. Collective functions as legs walking robot well micropaddles that can program chirality liquid flow. Point- line-symmetric enables flow (counterclockwise clockwise) be programmed according applied field

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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Visible‐Light‐Driven [2+2] Photocycloaddition in Self‐Assembled State for Time‐Resolved Information Encryption

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 22, 2025

Abstract Achieving time‐resolved information encryption is crucial for advanced functional materials but remains a formidable challenge. Photoresponsive supramolecular assemblies have gained attention as promising candidates in this area. This work presents unique strategy that employs α ‐cyanostilbenes to construct photoresponsive which enable finely regulating fluorescence color and photoresponse kinetics, facilitating effective encryption. Three 1 – 3 are designed by the combination of electron donor 3,4‐ethoxylene dioxythiophene appended benzaldehyde with acceptor phenylacetonitrile different substituents. All three compounds undergo reversible Z/E isomerization CH CN under 420 254 nm light irradiation. Interestingly, while CN/H 2 O high water content (95%), these found be able self‐assemble into spherical reduced molecular distances. Remarkably, upon exposure visible light, [2+2] cycloadditions occur within assemblies, exhibiting distinct kinetics variations due formation cycloaddition products, confirmed H NMR spectroscopy, high‐resolution mass spectrometry, single crystal structures. Furthermore, their changes demonstrate potential applications hydrogel‐based photo‐patterning. research offers compelling designing visible‐light‐driven fluorescent switching high‐level beyond.

Язык: Английский

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From nano to macro: Light‐driven chiral dopants in liquid crystals

Deleted Journal, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract Harnessing nanoscale molecular structural changes to achieve precise control over macroscopic devices represents an emerging and effective strategy. One promising approach involves the introduction of light‐driven chiral dopants into liquid crystals (LCs), enabling fine‐tuned modulation helical superstructures in cholesteric (CLCs) via photoisomerization. This strategy opens up exciting possibilities for development innovative photo‐responsive with dynamic functionalities. review focuses on most common used LCs, including azobenzene, diarylethene, α ‐cyanostilbene overcrowded alkene. The chemical design principles these four types switches are highlighted, along their abilities induce pitch inversion CLCs. Finally, applications controlling showcased, particularly display technologies, anti‐counterfeiting, optical 3D droplet manipulation. It is hoped that this provides valuable insights guidances novel advancement soft matter material applications.

Язык: Английский

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Bacteria‐responsive transformable peptide‐based nanomaterials inspired by human α‐defensin 6 for labeling and entrapping pathogenic bacteria

Deleted Journal, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Abstract Antimicrobial resistance caused by overuse of antibiotics has promoted the demand for effective antibacterial materials. However, development existing strategies mostly focuses on direct sterilization, which may lead to flora imbalance and drug resistance. Here, a series peptide‐based aggregation‐induced emssion nanomaterials (PBANs) with multiple structural domains were designed mimicking self‐assembly human α‐defensin 6. Specifically, PBANs self‐assemble form nanoparticles in physiological environments situ transform into nanofibers bacterial surfaces through receptor‐ligand interactions infected microenvironments, resulting enhanced fluorescence signal activation functions, while labeling entrapping bacteria. Different from traditional that directly kill pathogenic microorganisms, can inhibit motility invasion host system physical barriers affecting energy metabolism pathways. In addition, further recruit macrophages infection site engulf entrapped bacteria, thereby synergistically reducing efficiency. mouse piglet systemic models, showed favorable therapeutic efficacy, significantly load levels inflammation factors. Overall, this study provides perspectives developing biomimetic stimuli‐responsive combat infections.

Язык: Английский

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All-Optical Synapses Enabled by Photochromic Materials for High-Accuracy Optical Signal Recognition

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Язык: Английский

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Deterministic Placement of Achiral Emitters in Superchiral Fields for Superior Chiral Photoluminescence

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Chiral luminescence holds promise for various applications, but achieving strong, pixelated emission with a large dissymmetry factor (glum) on-chip integration remains challenging. Here we address this challenge by optically growing CdS emitters within the superchiral fields of Au spiral metasurfaces. This precise placement enhances emitter-field interaction, yielding chiral photoluminescence glum up to ∼0.5 and an ∼30-fold intensity enhancement. We demonstrate that both excitation wavelength emitter location significantly impact quality, highlighting critical role resonant spatial alignment fields. These findings provide crucial guidelines designing high-performance devices suitable photonic integration.

Язык: Английский

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