Stimulus-responsive polymer materials toward multi-mode and multi-level information anti-counterfeiting: recent advances and future challenges

Chemical Society Reviews, Год журнала: 2023, Номер 53(2), С. 606 - 623

Опубликована: Дек. 15, 2023

This review highlights the recent advances and discusses challenges perspectives of stimulus-responsive polymer (SRP)-based information-storage materials, which exhibit multi-mode or multi-level anti-counterfeiting performance.

Язык: Английский

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Intense Left‐handed Circularly Polarized Luminescence in Chiral Nematic Hydroxypropyl Cellulose Composite Films

Advanced Materials, Год журнала: 2024, Номер 36(18)

Опубликована: Янв. 25, 2024

Abstract Integrating optically active components into chiral photonic cellulose to fabricate circularly polarized luminescent materials has transformative potential in disease detection, asymmetric reactions, and anticounterfeiting techniques. However, the lack of cellulose‐based left‐handed light (L‐CPL) emissions hampers progress these functionalizations. Here, this work proposes an unprecedented strategy: incorporating a nematic organization hydroxypropyl with robust aggregation‐induced emission luminogens generate intense L‐CPL emission. By utilizing N , ‐dimethylformamide as good solvent for fluorescent matrices, produces right‐handed structure film uniform appearance reflective states. Remarkably, system integrates high factor (0.51) impressive quantum yield (55.8%) one fascinating composite. More meaningfully, approach is versatile, allowing incorporation luminogen derivatives emitting multicolored L‐CPL. These films possess exceptional mechanical flexibility (toughness up 0.9 MJ m −3 ) structural stability even under harsh environmental exposures, making them promising fabrication various products. Additionally, can be cast on fabrics reveal multilevel durable capabilities or used source induce enantioselective photopolymerization, thereby offering significant diverse practical applications.

Язык: Английский

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Biomimetic Mechanically Robust Chiroptical Hydrogel Enabled by Hierarchical Bouligand Structure Engineering

ACS Nano, Год журнала: 2024, Номер 18(22), С. 14629 - 14639

Опубликована: Май 22, 2024

Natural bouligand structures enable crustacean exoskeletons and fruits to strike a combination of exceptional mechanical robustness brilliant chiroptical properties owing multiscale structural hierarchy. However, integrating such high strength-stiffness-toughness photonic functionalities into synthetic hydrogels still remains grand challenge. In this work, we report simple yet general biomimetic strategy construct an ultrarobust hydrogel by closely mimicking the natural structure at multilength scale. The hierarchical engineering long-range ordered cellulose nanocrystals' structure, well-defined poly(vinyl alcohol) nanocrystalline domains, dynamic interfacial interaction synergistically contributes integration strength (23.3 MPa), superior modulus (264 toughness (54.7 MJ m

Язык: Английский

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Bioinspired Hierarchical Photonic Structures with Controllable Polarization and Color for Optical-Multiplexed Information Encryption

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

Optical multiplexing technologies, which integrate multiple optical channels based on photonic structures, offer a significant solution for high-capacity information storage and advanced encryption. However, these materials are limited by their inherent unswitchable chiral result in restricted control over the spatial distribution of light. Here, we propose to construct an integrating optical-multiplexed structure using tunable 1D crystals orientation texture via combined self-assembly shear-aligning approach. In this system, created diverse ethyl cellulose (EC) offers wide range light modulations through phase retardation. When with chromatic layer formed EC, wavelength polarization achieved. Notably, due identical components modulation crystal layers, traceless interface between them ensures both high confidentiality durability. By leveraging hierarchical slices well-defined states structural colors created, enabling construction platform multiplexed multichannel 3D 4D This study presents promising strategy develop traceless, highly confidential units controllable color encryption technologies.

Язык: Английский

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Bio‐Inspired Cholesteric Phase Cellulose Composite with Thermochromic and Circularly Polarized Structural Color for Multilevel Encryption

Advanced Functional Materials, Год журнала: 2023, Номер 34(2)

Опубликована: Сен. 26, 2023

Abstract The escalating need for enhanced cryptographic security necessitates the development of advanced materials designed secure storage and transmission information. Drawing inspiration from unique color‐altering polarizing capabilities beetles, this work develops a transparent, thermochromic, circularly polarized cholesteric phase cellulose composite (CPCC). This is achieved by integrating self‐assembled hydroxypropyl with liquid crystal (CLC) structure in tandem crosslinked poly(N‐isopropyl acrylamide) (PNIPAM) network. crosslinking density impacts response degree thermochromism, which can be regulated modifying UV exposure time during PNIPAM production. CLC CPCC uniquely results reflected right light. When coupled waveplates, mechanism inverts rotation direction light, creating orthogonal structural colors different brightness levels under left excellent transparency facilitates seamless integration environment, offering optimal camouflage. Sophisticated techniques, such as color coding Morse coding, further incorporated within to increase encryption complexity decryption. Collectively, CPCC's transparency, chirality present significant potential design high‐security information encryption, contributing valuable insights field.

Язык: Английский

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Application of Multicolor Fluorescent Carbon Dots Based on Tea Polyphenols in a White Light-Emitting Diode and Room-Temperature Phosphorescence

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(7), С. 9182 - 9189

Опубликована: Фев. 12, 2024

Carbon dots (CDs) are new carbon nanomaterials, among which those prepared from biomass popular due to their excellent optical properties and environmental friendliness. As representative natural phenolic compounds, tea polyphenols ideal precursors with fluorescent aromatic rings hydroxyl structures. Usually, polyphenolic can only be used produce blue or green CDs, fluorescence in long wavelength domains, such as orange red, cannot achieved. Herein, the high reactivity of groups o-phthalaldehyde was exploited modulate pH during carbonation process, led redshifts wavelengths. Different values reaction caused take different paths form exhibiting conjugated structures, resulting providing colors. Finally, by utilizing situ hydrolysis ethyl orthosilicate, polyphenol-based were embedded into a silica matrix, inducing phosphorescence dots. This study provides approach for preparation application CDs.

Язык: Английский

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Polysaccharide Nanocrystals-Based Chiral Nematic Structures: From Self-Assembly Mechanisms, Regulation, to Applications

ACS Nano, Год журнала: 2024, Номер 18(34), С. 22675 - 22708

Опубликована: Авг. 13, 2024

Chiral architectures, one of the key structural features natural systems ranging from nanoscale to macroscale, are an infinite source inspiration for functional materials. Researchers have been, and still are, strongly pursuing goal constructing such structures with renewable sustainable building blocks via simple efficient strategies. With merits high sustainability, renewability, ability self-assemble into chiral nematic in aqueous suspensions that can be preserved solid state, polysaccharide nanocrystals (PNs) including cellulose (CNCs) chitin (ChNCs) offer opportunities reach target. We herein provide a comprehensive review focuses on development CNCs ChNCs use advanced First, introduction ChNCs, cellulose- chitin-formed organizations world, given. Then, self-assembly process PNs factors influencing this comprehensively discussed. After that, we showcased emerging applications self-assembled ChNCs. Finally, concludes perspectives challenges field.

Язык: Английский

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Nonlinear oscillatory rheology of aqueous suspensions of cellulose nanocrystals and nanofibrils

Journal of Rheology, Год журнала: 2024, Номер 68(4), С. 491 - 508

Опубликована: Май 16, 2024

In this work, the nonlinear rheological behavior of aqueous suspensions composed two typical nanocellulose [rod-like cellulose nanocrystals (CNCs) and filamentous nanofibrils (CNFs)] was examined compared by using various large-amplitude oscillatory shear (LAOS) analysis methods, such as Fourier-transform rheology, stress decomposition, Chebyshev polynomials, sequence physical processes. From our analysis, parameters higher harmonics, dissipation ratio, strain hardening thickening transient modulus, cage modulus were obtained quantitatively analyzed. CNCs tend to assemble form anisotropic structures in an medium while CNFs are entangled gels. The CNF demonstrated a significant viscous overshoot had stronger yield stresses, but CNC more ductile. case low concentrations, intracycle medium-amplitude region lower ratios at small amplitudes. Although both revealed existence four transition processes (viscoplastic deformation, structural recovery, early-stage yielding, late-stage yielding), exhibited recovery ability. Larger amplitudes did not invariably result broader range transitions, which also affected excitation frequency. application LAOS methods provided valuable insights into suspensions, great importance for enhancing their industrial perspectives.

Язык: Английский

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All‐Biomass‐Based Hierarchical Photonic Crystals with Multimode Modulable Structural Colors and Morphing Properties for Optical Encryption

Laser & Photonics Review, Год журнала: 2024, Номер unknown

Опубликована: Июнь 15, 2024

Abstract Materials with structural coloration capable of multimode color manipulation are gaining growing significance for advanced encryption and high‐security anti‐counterfeiting applications. Among the most promising candidates naturally derived biomaterials, owing to their renewable, biocompatible, biodegradable features developing sustainable, bio‐interfaced photonic platforms. Nevertheless, strategies developed from biological materials usually exhibit limited optical operation modes, lowering capability security level. Here, an all‐biomass‐based crystal platform is reported that hierarchically integrates chiral nematic inverse opal structures through a combination colloidal assembly, silk protein self‐assembly, self‐assembly cellulose nanocrystals, enabling multiplex in 2D 3D spaces. The platform's Janus‐style integration brings specular diffuse reflection, direction‐dependent circular dichroism, birefringence into single form, thereby facilitating tuning plane by altering illumination‐viewing modes. inherent shape plasticity proteins allows subsequent creation platforms diverse configurations, offering additional spatial flexibility encoding. It demonstrated this framework exhibits versatile, multilevel, high‐capacity spaces, representing innovative solution bolster measures against counterfeiting future technologies.

Язык: Английский

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Multi-responsive circularly polarized luminescence micro-patterns with high figure of merit towards multi-dimensional data encoding

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159821 - 159821

Опубликована: Янв. 1, 2025

Язык: Английский

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