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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Sophisticated yet Convenient Information Encryption/Decryption Based on Synergistically Time‐/Temperature‐Resolved Photonic Inks

Advanced Science, Journal Year: 2022, Volume and Issue: 10(5)

Published: Dec. 11, 2022

Exploring high-safety but convenient encryption and decryption technologies to combat threats of information leakage is urgently needed remains a great challenge. Here, synergistically time- temperature-resolved coding/decoding solution based on functional photonic inks demonstrated. Encrypted messages can be stored into multiple channels with dynamic-color patterns, only enabled at appointed temperature time points. Notably, the ink easily processed quick-response codes multipixel plates. With high transparency responsive color variations controlled by compositions ambient temperatures, advanced 3D stacking multichannel coding Morse techniques applied for multi-information storage, complex anticounterfeiting, interference. This study paves an avenue design development dynamic high-end anticounterfeiting applications.

Language: Английский

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Chiral nematic cellulose nanocrystal composites: An organized review

The Canadian Journal of Chemical Engineering, Journal Year: 2024, Volume and Issue: 102(8), P. 2695 - 2713

Published: March 18, 2024

Abstract Cellulose nanocrystals (CNCs) are commercially available materials derived from cellulose, the most abundant biopolymer on our planet. Due largely to their high strength, surface area‐to‐volume ratio, tailorable chemistry, and abundance of biomass feedstocks with which produce them, CNCs have attracted significant interest in applications spanning paints coatings, composites, packaging, biomedical sectors. However, perhaps interestingly, will self‐assemble (or, as I've teased title, organize ) form highly ordered chiral nematic liquid crystal phases when concentrated suspension. Upon complete solvent evaporation, this order is ‘locked’, yielding films structural colour—colour arising not due chemical pigments, but rather physical structure a material itself. In pursuit novel multi‐functional materials, research has shifted recently towards incorporation functional additives composite films. Along introducing basics crystals self‐assembly, review discusses main approaches used CNC‐based films: co‐assembly, templating, post‐processing, highlights exceptional examples each case. Finally, I give my uniquely Canadian perspective current status, future prospects, major challenges associated development materials.

Language: Английский

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Stimuli-Responsive Chiral Cellulose Nanocrystals Based Self-Assemblies for Security Measures to Prevent Counterfeiting: A Review

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(32), P. 41743 - 41765

Published: Aug. 5, 2024

The proliferation of misleading information and counterfeit products in conjunction with technical progress presents substantial worldwide issues. To address the issue counterfeiting, many tactics, such as use luminous anticounterfeiting systems, have been investigated. Nevertheless, traditional fluorescent compounds a restricted effectiveness. Cellulose nanocrystals (CNCs), known for their renewable nature outstanding qualities, present an excellent opportunity to develop intelligent, optically active materials formed due self-assembly behavior stimuli response. CNCs derivatives-based self-assemblies allow creation adaptable that may be used prevent counterfeiting. These integrate photophysical characteristics components stimuli-responsive behavior, enabling fibers, labels, films, hydrogels, inks. Despite attention, existing frequently fall short practical criteria limited knowledge poor performance comparisons. This review aims provide on latest developments anticounterfeit based derivatives. It also includes scope artificial intelligence (AI) near future. will emphasize potential uses these encourage future investigation this rapidly growing area study.

Language: Английский

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Dynamically mechanochromic, fluorescence-responsive, and underwater sensing cellulose nanocrystal-based conductive elastomers

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: 296, P. 139681 - 139681

Published: Jan. 10, 2025

Language: Английский

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

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 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.

Language: Английский

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A Tunable Hydrophilic–Hydrophobic, Stimulus Responsive, and Robust Iridescent Structural Color Bionic Film with Chiral Photonic Crystal Nanointerface

Small, Journal Year: 2024, Volume and Issue: unknown

Published: May 8, 2024

Abstract Bio‐inspired in nature, using nanomaterials to fabricate the vivid bionic structural color and intelligent stimulus responsive interface as smart skin or optical devices are widely concerned remain a huge challenge. Here, flexible film is designed fabricated with chiral nanointerface tunable hydrophilic–hydrophobic by ultrasonic energy perturbation strategy crosslinking of cellulose nanocrystals (CNC). An adjustable hydrophilic hydrophobic properties constructed supramolecular assembly ionic liquid molecule. The possessed variable hydrophilic–hydrophobic, responsive, robust iridescent color. reflective wavelength helical pitch can be easily modulated through strategy. covalent cross‐linking has excellent robustness, good elasticity flexibility. brilliant attributed surface charge change CNC photonic crystal, which disturbed perturbation. structure response properties. materials have potential applications skin, devices, materials, robots, anti‐counterfeiting, colorful displays, stealth materials.

Language: Английский

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Recent Advances in Flexible CNC‐Based Chiral Nematic Film Materials

Small, Journal Year: 2023, Volume and Issue: 20(5)

Published: Sept. 26, 2023

Abstract Cellulose nanocrystal (CNC) is a renewable resource derived from lignocellulosic materials, known for its optical permeability, biocompatibility, and unique self‐assembly properties. Recent years have seen great progresses in cellulose nanocrystal‐based chiral photonic materials. However, due to inherent brittleness, shows limitations the fields of flexible sensors food freshness testing. In order solve above limitations, attempts been made improve flexibility materials without destroying their structural color. Despite these progresses, systematic review on them lacking. This aims fill this gap by providing an overview main strategies latest research findings flexibilization nematic film (FCNM). Specifically, typical substances methods used preparation are summarized. Moreover, different kinds composites compared terms flexibility. Finally, potential applications future challenges discussed, inspiring further field.

Language: Английский

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Construction of cellulose structural-color pigments with tunable colors and iridescence/non-iridescence

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 313, P. 120877 - 120877

Published: April 3, 2023

Language: Английский

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Impressive merits of Nanocellulose driving sustainable beauty

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 353, P. 123270 - 123270

Published: Jan. 14, 2025

Language: Английский

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