An information encrypted heterogeneous hydrogel with programmable mechanical properties enabled by 3D patterning

Ye, Yuhang; Yu, Zhengping; Zhang, Yifan; Jiang, Feng

doi:10.1039/d3mh00234a

Cited by 12 publications

(2 citation statements)

References 52 publications

(67 reference statements)

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“…Hydrogels can be used as a network to store the structural and functional information on molecules both macroscopically and microscopically. The dynamic control and functional regulation of assemblies can be realized by programming the interaction between stimulus-responsive molecules. − In many such studies, the encoding of synthetic polymers (e.g., heat-sensitive cross-linked polymers, , ultraviolet (UV)-sensitive ionic polymers, pH-sensitive metal chelates) as moieties that confer dynamically responsive properties is a common means. However, encoding the redox processes of stimulus-responsive substances can also be used as a way to create dynamical hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Dopamine-Modified Chitosan Patterning Hydrogel with Dynamic Information Storage Ability

Li,

Yang,

et al. 2024

ACS Appl. Mater. Interfaces

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The storage of dynamic information in hydrogels has aroused considerable interest regarding the multiple responsiveness of soft matter. Herein, we propose an electrical writing methodology to prepare dopamine (DA)-modified chitosan hydrogels with a dynamic information storage ability. A pHresponsive chitosan hydrogel medium was patterned by cathodic writing to in situ generate OH − in the writing area, at which dopamine underwent an auto-oxidation reaction in the locally alkaline environment to generate a dark color. The patterned information on the hydrogel can be encoded simply by electrical signals. The speed of information retrieval is positively correlated with the charge transfer during the electrical writing process, and the hiding of information is negatively correlated with the environmental stimulus (i.e., dopamine concentration, pH value, etc.). To showcase the versatility of this medium for information storage and the precision of the pattern, a quick response (QR) code is electronically written on dopamine-modified chitosan hydrogel and can be recognized programmably by a standard mobile phone. The results show that electrical regulation is a novel means to program the information storage process of hydrogels, which inspires future research on structural and functional information storage using stimulus-responsive hydrogels.

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Section: Introductionmentioning

confidence: 99%

Dopamine-Modified Chitosan Patterning Hydrogel with Dynamic Information Storage Ability

Li,

Yang,

et al. 2024

ACS Appl. Mater. Interfaces

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“…These products have severely affected people's daily lives and livelihoods. To address these problems, people have developed many novel information encryption [1][2][3][4][5][6] and transient memory technologies [7][8][9][10][11] in recent years. The latter is mainly used to rapidly destroy sensitive data in an emergency, while the former can not only ensure the confidentiality, integrity, and accuracy of information but also can prevent information from being tampered, forged, and leaked out.…”

Section: Introductionmentioning

confidence: 99%

90% Yield Production of Spiropyran Covalently Grafted MXene‐Based RRAM Devices for Optoelectronic Dual‐Response Switching

Zhao,

Liu,

Wang

et al. 2023

Advanced Optical Materials

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Over the past decade, great efforts have been devoted to both intellectual property protection and information security protection. As a promising electroactive material, MXene is covalently or non‐covalently functionalized with organic species/polymers to produce a large amount of novel functional materials for biomedicine, optoelectronics, and energy storage. By using spiropyran covalently functionalized MXene (MXene‐SP) as an active material, an optoelectronic dual‐response resistive random access memory (RRAM) device is successfully fabricated. Upon UV illumination, the active layer is changed from MXene‐SP (SP: ring‐closed spiropyran form) observed under the illumination of blue light to MXene‐MC (MC: ring‐opened merocyanine form) due to photo‐induced “close‐to‐open” isomerization. The as‐fabricated ITO/MXene‐SP/ITO device exhibits typical nonvolatile optoelectronic dual‐response RRAM performance, with a production yield exceeding 90%. The achieved switch‐on/off voltages are −1.25/2.07 V under the illumination of blue light and −0.58/0.91 V under UV illumination. The switching bias window (Δ|VON − VOFF|) and the ON/OFF current ratio of MXene‐MC are 44.9% and 14.7% of these of MXene‐SP, respectively. By utilizing the window difference between the RRAM performance achieved under the illumination of different lights, one can easily encrypt the quick response code.

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Spatially and Temporally Programmable Transparency Evolutions in Hydrogels Enabled by Metal Coordination toward Transient Anticounterfeiting

Zhao,

Zhou,

Zhang

et al. 2024

Small

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Hydrogels have emerged as promising candidates for anticounterfeiting materials, owing to their unique stimulus‐responsive capabilities. To improve the security of encrypted information, efforts are devoted to constructing transient anticounterfeiting hydrogels with a dynamic information display. However, current studies to design such hydrogel materials inevitably include sophisticated chemistry, complex preparation processes, and particular experimental setups. Herein, a facile strategy is proposed to realize the transient anticounterfeiting by constructing bivalent metal (M2+)‐coordination complexes in poly(acrylic acid) gels, where the cloud temperature (Tc) of the gels can be feasibly tuned by M2+ concentration. Therefore, the multi‐Tc parts in the gel can be locally programmed by leveraging the spatially selective diffusion of M2+ with different concentrations. With the increase of temperature or the addition of a complexing agent, the transparency of the multi‐Tc parts in the gel spontaneously evolves in natural light, enabling the transient information anticounterfeiting process. This work has provided a new strategy and mechanism to fabricate advanced anticounterfeiting hydrogel materials.

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An information encrypted heterogeneous hydrogel with programmable mechanical properties enabled by 3D patterning

Abstract: Heterogeneous architectures with defined patterns found in nature has stimulated the burgeoning development of biomimetic materials. However, it remains difficult to construct soft matter like hydrogels that mimic biological materials...

Cited by 12 publications

References 52 publications

Dopamine-Modified Chitosan Patterning Hydrogel with Dynamic Information Storage Ability

Dopamine-Modified Chitosan Patterning Hydrogel with Dynamic Information Storage Ability

90% Yield Production of Spiropyran Covalently Grafted MXene‐Based RRAM Devices for Optoelectronic Dual‐Response Switching

Spatially and Temporally Programmable Transparency Evolutions in Hydrogels Enabled by Metal Coordination toward Transient Anticounterfeiting

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