Visible‐Light‐Responsive Photoreversible Multi‐Color Switching for Rewritable Light‐Printing and Information Display DOI
Yun Zhang, Yao Dou, Zuyang Ye

et al.

Small, Journal Year: 2023, Volume and Issue: 20(23)

Published: Dec. 27, 2023

Abstract Photoreversible color switching systems (PCSSs) exhibiting multi‐color responses to visible light are favored for sustainable societal development over those relying on ultraviolet due safer operation and better penetration depth. Here, a PCSS capable of responsive based highly photoreductive rutile‐phase Sn‐doped TiO 2−x nanoparticles is reported. The Sn‐doping significantly red‐shifts the absorption band region, improving charge separation transfer efficiencies introducing Ti 3+ species oxygen vacancies as internal sacrificial electron donors scavenging photogenerated holes. resulting feature exceptional photoreduction ability activity, thereby enabling photoreversible various redox dyes operational under illumination. Furthermore, can be achieved via overlay effect by combining different in one system, opening door many advanced applications, demonstrated their successful uses developing visible‐light‐driven rewritable light‐printing visual information displays.

Language: Английский

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

Ying Shen,

Xiaoxia Le, Yue Wu

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 53(2), P. 606 - 623

Published: Dec. 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.

Language: Английский

Citations

122
Anti-freeze hydrogel-based sensors for intelligent wearable human-machine interaction DOI
Zhiwei Fu, He Liu,

Qingying Lyu

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148526 - 148526

Published: Jan. 7, 2024

Language: Английский

Citations

55
A Dual‐Responsive Liquid Crystal Elastomer for Multi‐Level Encryption and Transient Information Display DOI Open Access

Hong‐Qin Wang,

Yuqi Tang,

Zi‐Yang Huang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(48)

Published: Oct. 11, 2023

Abstract Information security has gained increasing attention in the past decade, leading to development of advanced materials for anti‐counterfeiting, encryption and instantaneous information display. However, it remains challenging achieve high with simple procedures low‐energy stimuli. Herein, a series strain/temperature‐responsive liquid crystal elastomers (LCEs) are developed dual‐modal, multi‐level real‐time, rewritable transient The as‐prepared polydomain LCEs can change from an opaque state transparent under strain or temperature stimuli, transition strains temperatures highly dependent on concentration long‐chain flexible spacers. encrypted by different LCE inks be decrypted specific temperatures, protection security. Furthermore, combination phase photothermal effect multi‐walled carbon nanotubes (MWCNTs), we achieved repeatable display using near‐infrared (NIR) light as pen writing. This study provides new insight into versatility broad applications.

Language: Английский

Citations

46
Self-regulated reversal deformation and locomotion of structurally homogenous hydrogels subjected to constant light illumination DOI Creative Commons

Kexin Guo,

Xuehan Yang,

Chao Zhou

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 24, 2024

Abstract Environmentally adaptive hydrogels that are capable of reconfiguration in response to external stimuli have shown great potential toward bioinspired actuation and soft robotics. Previous efforts focused mainly on either the sophisticated design heterogeneously structured or complex manipulation stimuli, achieving self-regulated reversal shape deformation homogenous under a constant stimulus has been challenging. Here, we report molecular structurally containing simultaneously two spiropyrans exhibit transient when subjected illumination. The mechanism originates from sequential descending-ascending charge variation coexisting upon irradiation, resulting macroscale volumetric contraction-expansion hydrogels. Hydrogel film actuators were developed display temporary bidirectional transformations rolling Our work represents an innovative strategy for programming homogeneous using single stimulus.

Language: Английский

Citations

37
Hydrogels with Differentiated Hydrogen‐Bonding Networks for Bioinspired Stress Response DOI
Wei Zhao,

Baohu Wu,

Zhouyue Lei

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 28, 2024

Abstract Stress response, an intricate and autonomously coordinated reaction in living organisms, holds a reversible, multi‐path, multi‐state nature. However, existing stimuli‐responsive materials often exhibit single‐step monotonous reactions due to the limited integration of structural components. Inspired by cooperative interplay extensor flexor cells within Mimosa's pulvini, we present hydrogel with differentiated hydrogen‐bonding (H‐bonding) networks designed enable biological stress response. Weak H‐bonding domains resemble cells, confined hydrophobic network stabilized strong clusters (acting like cells). Under external force, are disrupted, facilitating water diffusion from bottom layer enabling transient expansion pressure gradient along thickness direction. Subsequently, diffuses upward, gradually equalizing pressure, while weak undergo elastic deformation. Consequently, undergoes sequence reversible pluralistic motion responses, similar touch‐triggered Intriguingly, it exhibits stress‐dependent color shifts under polarized light, highlighting its potential for applications time‐sensitive “double‐lock” information encryption systems. This work achieves response inspired natural tissues using simple hydrogel, paving way substantial advancements development intelligent soft robots.

Language: Английский

Citations

30
Tailoring Photoweldable Shape Memory Polyurethane with Intrinsic Photothermal / Fluorescence Via Engineering Metal‐Phenolic Systems DOI

Zhongxin Ping,

Fang Xie, Xiaobo Gong

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 9, 2024

Abstract Multifunctional shape memory polymers are significant for next‐generation intelligent systems as smart materials. However, their practical applications limited by toughness, manufacturability, and functional integration strategies. Besides, while 4D printing is used to construct deformable devices, the accessible shapes difficulty of integrating multiple materials hindered development multifunctional devices. Herein, metal‐phenolic coordination crosslinks tailor tough polyurethanes with intrinsic photothermal effect and/or tunable fluorescence. The reversible dissociation complexes upon loading provides an efficient energy dissipation polymer network. photothermal/fluorescent properties target polyurethane can be effortlessly programmed changing coordinated metals ligands. obtained fluorescent displays fluorescence through dissociation‐association dynamic bonds thermal stimulus. Moreover, relying on light‐triggered hybrid exchange reactions among various bonds, heterogeneous interfaces merged manufacture exquisite 3D shape‐shifting devices integrate more advanced functions. As demonstrations, photothermal‐responsive stent, encryption device produced based photo‐welding instead printing. This study not only a convenient supramolecular strategy constructing but also demonstrates feasible method making personalized integrated architectures.

Language: Английский

Citations

18
Cephalopod‐Inspired Chemical‐Gated Hydrogel Actuation Systems for Information 3D‐Encoding Display DOI
Baoyi Wu, Muqing Si,

Luqin Hua

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 27, 2024

Cephalopods evolve the acetylcholine-gated actuation control function of their skin muscles, which enables dynamic/static multimode display capacities for achieving perfectly spatial over colors/patterns on every inch skin. Reproduction artificial analogs that exhibit similar multimodal is essential to reach advanced information three-dimensional (3D) encoding with higher security than classic 2D-encoding strategy, but remains underdeveloped. The core difficulty how replicate such chemical-gated into soft actuating systems. Herein, this work proposes develop azobenzene-functionalized poly(acrylamide) (PAAm) hydrogel systems, whose upper critical solution temperature (UCST) type responsiveness can be intelligently programmed or even gated by addition hydrophilic α-cyclodextrin (α-CD) molecules reversible association pendant azobenzene moieties via supramolecular host-guest interactions. By employing α-CD-gated actuator as an analogue cephalopods' muscle, biomimetic mechanically modulated multicolor fluorescent systems are designed, demonstrate a conceptually new "thermal stimulation-hydrogel actuation-fluorescence output" mechanism. Consequently, high-security 3D-encoding carriers unprecedented combination single-input multiple-output, dual-mode and spatially controlled achieved. This bioinspired strategy brings functional-integrated features opens previously unidentified avenues security.

Language: Английский

Citations

16
Bioinspired thermadapt shape-memory polymer with light-induced reversible fluorescence for rewritable 2D/3D-encoding information carriers DOI Creative Commons
Jinhui Jeanne Huang‬‬‬‬, Yue Jiang, Qiuyu Chen

et al.

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

Published: Nov. 6, 2023

Abstract Fluorescent materials have attracted widespread attention for information encryption owing to their stimuli-responsive color-shifting. However, the 2D encoding of fluorescent images poses a risk leakage. Herein, inspired by mimic octopus capable camouflage changing colors and shapes, we develop thermadapt shape-memory film (TSFF) integrating 2D/3D in one system. The TSFF is based on anthracene group with reversible photo-cross-linking poly (ethylene-co-vinyl acetate) network properties. accompanied repeatable fluorescence-shifting enables rewritable encoding. Meanwhile, properties not only reconfiguration permanent shape creating erasing 3D patterns, i.e., information, but also facilitates recoverable programming This strategy can enhance security because designated inspectors decode providing sequential heating recovery UV exposure. Overall, will inspire design smart high-security carriers.

Language: Английский

Citations

32
Swollen hydrogel nanotechnology: Advanced applications of the rudimentary swelling properties of hydrogels DOI Creative Commons
Rong Wang, Chongling Cheng,

Huiyun Wang

et al.

ChemPhysMater, Journal Year: 2024, Volume and Issue: 3(4), P. 357 - 375

Published: Aug. 23, 2024

Language: Английский

Citations

12
Hybrid Encoding Strategy of Multi-Stimulus Response Aggregation-Induced Emission Hydrogels for Advanced Information Encryption and Safety DOI
Li Zhou, Biao Xia, Tengfei Lin

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(2), P. 1422 - 1428

Published: Jan. 9, 2024

Optical information encryption is closely related to security, and smart hydrogels with tunable optical properties under external stimuli have received much attention as storage materials. However, it still challenging achieve complex camouflage large-capacity in hydrogel systems. Herein, a hybrid encoding strategy afforded by an aggregation-induced emission (AIE) fluorescent multi-stimuli responsiveness pioneered feasible alternative for multiple strategies. More specifically, the photoluminescence intensity of system can be independently or mutually tuned specific stimuli, including solvent (DMSO/H2O), pH (NaOH/HCl), metal ions (Fe3+/EDTA2–), leading precise protection decoding encrypted information. That is, only correct stimulus sequence unlock stored real information, thus enabling functionality multilayer on-demand decryption We envisage that present carrying showcasing AIE through stimulation regulation exhibits great potential secure writing anticounterfeit encryption.

Language: Английский

Citations

9