CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jia-Yue Zhang,Tian-Run Lv,Yi-Han Xue,Wen-Hai Zhang,Ming-Jie Yin,Quan-Fu An
Hydrogel-based physical dual-encryption typically relies on the reversible shape-deformation of polymer chains for the decryption. However, the stored information is confronted by indecipherability at the microscale because the intrinsic relaxation of polymer chains would disrupt the fidelity of encoded information. Inspired by female Doryteuthis opalescens squid’s camouflage strategy (i.e. , switching a stripe on its mantle from nearly transparent to opaque white), we devised a reversible transmittance-changeable hydrogel layer to fully cover the mono-encrypted information layer for dual-encryption. The micro-structured hydrogel was manufactured via 3D printing to encode the information, which can be decoded by UV-induced fluorescent emission. Then, the white camouflage hydrogel was constructed to conceal the mono-encrypted layer, which will not affect the information encoding layer during the reversible polymer chain mobility. The information can be decoded with alkaline solution and UV irradiation in a rapid speed, i.e. , in 4 min, with good reusability. Moreover, the information was accurately unveiled even at microscale resolution, holding great promise for high-level encryption at the device level.
研究领域:
材料科学
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生物仿生学
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产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2019
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IF 10.159
Yifang Gao,Huilin Zhang,Yuan Jiao,Wenjing Lu,Yang Liu,Hui Han,Xiaojuan Gong,Shaomin Shuang,Chuan Dong
Activating room-temperature phosphorescence (RTP) emission in aqueous environments is a challenging feat because of the releasing of nonradiative decay pathways. Here, a design strategy was presented that effectively promotes the presence of RTP of carbon dots (CDs) in aqueous solutions by utilizing CDs and melamine to construct hydrogen-bonded networks to form a polymer (M-CDs). The obtained M-CDs not only enjoy an ultralong phosphorescence lifetime of 664 ms, but also relatively high quantum yield of 25% in an aqueous environment at 468 nm excitation. This is also a rare example of achieving RTP of CDs with a solid state in an aqueous environment. Further investigations reveal that the hydrogen-bonded networks are critical to the implementation of RTP in an aqueous environment. The existence of covalent bonds in CDs and melamine further stabilizes the hydrogen-bond skeleton and triplet state. Furthermore, the bound water formed inside the M-CDs also plays an indispensable role in stabilizing the RTP in the aqueous solution. Given the feature, the M-CDs are used to effectively implement double data encryption and decryption. In addition, this strategy is universal for most phosphorescence materials. This result will pave the way toward expanding RTP materials and their applications in aqueous environments.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Zelin Zhu,Xiuping Qi,Zhihao Zhang,Xuanyu Dou,Xinxin Jiang,Yutong Liu,Shencheng Fu,Xintong Zhang,Yichun Liu
Independently-manipulated optical encryption has attracted great attention due to its high security and multiple application scenarios. Although photochromic molecules have become preferred holographic display units, the integration of dynamic modulation both in hologram and fluorescence for orthogonal encryption is still challenged. Herein, a latticed holographically steganographic array is constructed by incorporating a plasticizer (tri-o-cresyl phosphate, TOCP) into spirooxazine (SO) based polymers, thereby modulating the isomerization rate and the UV-fluorescence kinetics between SO and merocyanine (MC). The period to reach fluorescence saturated value for each information bit in the latticed device can be widely modulated between 60 and 1700 s. Based on the property, only through ultraviolet stimulation can array information gradually be converted from spatial lattice coordinates to holographic display time. Then, a hidden 3D image can be determined from rapidly updatable reconstructed hologram video with refresh rate 1.125 Hz by the above spatiotemporal dual-encryption keys. This work provides a bright path for the ultra-high safety steganography and adaptive stereoscopic imaging.
研究领域:
光学
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材料科学
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信息安全
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产品关联
DOI
高影响因子
SmartMat
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2023
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IF 20.4
Yikun Liu,Yongju Gao,Beom Jin Kim,Meili Xia,Yunlong Zhou,Yongjing Zhang,Yang Li,Jianying Huang,Duxia Cao,Songfang Zhao,Jong-Hyun Ahn,Yuekun Lai
Human–machine interactive platforms that can sense mechanical stimuli visually and digitally are highly desirable. However, most existing interactive devices cannot satisfy the demands of tactile feedback and extended integration. Inspired by the mechanoluminescence (ML) function of cephalopod skin and the sensitive perception of microcracked slit-organs, a bioinspired stretchable interactive platform is developed by designing a stretchable poly(styrene-block-butadiene-block-styrene)/fluorescent molecule (SFM) composite followed by the in situ polymerization of pyrrole (Py) and deposition of carbon nanotubes (CNTs), which possesses a simple multilayered structure and quantitatively senses the applied strains via the variations of digital electrical resistance and visual fluorescence intensity. Using the strain-dependent microstructures derived from the synergistic interactions of the rigid PPy/CNTs functional layer and SFM, the SFM/PPy/CNTs-based platforms exhibit excellent strain-sensing performance manifested by a high gauge factor (GF = 2.64 × 10 4 ), wide sensing range (~270%), fast response/recovery time (~155/195 ms), excellent stability (~15,000 cycles at 40% strain), and sensitive ML characteristics under ultraviolet illumination. Benefiting from the novel fusion of digital data and visual images, important applications, including the detection of wrist pulses and human motions, and information dual-encryption, are demonstrated. This study demonstrates the superiority of advanced structures and materials for realizing superior applications in wearable electronics.
研究领域:
材料科学
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生物医学工程
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柔性电子
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
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IF 3.261
Yuan Wang,Wenjun Zhang
Developing novel luminescent hydrogel is tremendously significant for promoting process in the application of optical technology. Intelligent, versatile and eco-friendly features seem to be dominated trends. Here, we report a luminous hydrogel based on the stimulating response behavior. Lanthanide complex Tb(SA) (SA = salicylic acid) is incorporated into hydrogel, achieving light color conversion via controlled antenna effect as established spectral analysis. Moreover, a dual-encryption anticounterfeiting hydrogel device activated by both photons and alkali molecules was developed via utilizing sandwich structure based on encapsulate technology. Compared to conventional hybrid luminescent materials, this hydrogel as a functionalized material can be applied into multiple fields and is an ideal choice in practical applications.
研究领域:
材料科学
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光学技术
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）