ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shunni Dong,Qianqian Zheng,Meiqi Tang,Shaoxiong Zhu,Jingjing Nie,Binyang Du
Chromic materials play a decisive and escalating role in information security. However, it is challenging to develop chromic materials for encryption technologies that can hardly be imitated. Inspired by versatile metachrosis in nature, a series of coumarin-based 7-(6-bromohexyloxy)-coumarin microgel colloidal crystals (BrHC MGCC) with multiresponsive chromism are able to be assembled by ionic microgels in poly(vinyl alcohol) (PVA) solution followed by two cycles of freezing–thawing. The ionic microgels can be finely tailored by in situ quaternization with tunable size under varied temperatures and hydration energies of counterions as well as quenched luminescence under UV irradiation, which endows BrHC MGCC with intriguing chromism in the dual-channel coloration of physical structural color and chemical fluorescent color. Three types of BrHC MGCC exhibit various change ranges in structural coloration and similar quenching in fluorescence emission, which can be utilized for the development of the static–dynamic combined anticounterfeiting system with dual coloration. The information conveyed by the BrHC MGCC array presents dynamic variation versus temperature, while the static information can be only integrally read in both sunlight and a 365 nm UV lamp. The fabrication of a microgel colloidal crystal with dual coloration opens a facile and ecofriendly window for multilevel information security, camouflage, and a cumbersome authentication process.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2016
·
IF 3.138
Yin Wan,Bin Zou,Hailong Zeng,Lunning Zhang,Ming Chen,Guiming Fu
In this study, we analyzed the inhibitory effect of verbascoside against xanthine oxidase (XOD) in vitro by using animal model and in vivo by direct inhibition assay. Results showed that verbascoside could reduce uric acid in rat serum and inhibit XOD activity in rat liver. The IC 50 value of restraining XOD activity was 81.11 mg mL −1 . Fluorescence chromatographic analysis and circular dichroism spectroscopy indicated that the secondary structures of XOD were changed after incubation with verbascoside. The docking simulation showed that verbascoside could enter into the active site of XOD and form hydrogen bonding with amino acid residues (such as Lys-1045, Arg-880, Arg-912, Glu-1261 and Gln-1194). The results suggested that verbascoside, which is a naturally occurring water-soluble antioxidant, could be a potential low-toxicity XOD inhibitor for hyperuricemia treatment.
研究领域:
药理学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 28
·2401589
·
IF 27.4
Yu Sun,Xiaoxia Le,Hui Shang,Ying Shen,Yue Wu,Qingquan Liu,Partick Théato,Tao Chen
Constructing an anti-counterfeiting material with non-interference dual optical modes is an effective way to improve information security. However, it remains challenging to achieve multistage secure information encryption due to the limited stimulus responsiveness and color tunability of the current dual-mode materials. Herein, a dual-mode hydrogel with both independently tunable structural and fluorescent colors toward multistage information encryption, is reported. In this hydrogel system, the rigid lamellar structure of poly(dodecylglyceryl itaconate) (pDGI) formed by shear flow-induced self-assembly provides the restricted domains wherein monomers undergo polymerization to form a hydrogel network, producing structural color. The introduction of fluorescent monomer 6-acrylamidopicolinate (6APA) as a complexation site provides the possibility of fluorescent color formation. The hydrogel's angle-dependent structural color can be controlled by adjusting the crosslinking density and water content. Additionally, the fluorescence color can be modulated by adjusting the ratio of lanthanide ions. Information of dual-mode can be displayed separately in different channels and synergistically overlayed to read the ultimate message. Thus, a multistage information encryption system based on this hydrogel is devised through the programed decryption process. This strategy holds tremendous potential as a platform for encrypting and safeguarding valuable and authentic information in the field of anti-counterfeiting.
研究领域:
材料科学
·
光学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Zihan Liu,Zihao Chen,Shuangye Yang,Hong Jia,Jie Wei
In this study, we prepared a multicolor structural–fluorescent CdS–PEGDA photonic crystal hydrogel (SFC-CPH) with a dual display mode, which has two different optical states: structural color mode and fluorescent color mode. SFC-CPH displays structural color mode under visible light and fluorescent color mode under ultraviolet light. Initially, monodisperse CdS colloidal particles were synthesized via a hydrothermal method, leading to the self-assembly of a photonic crystal template. The high refractive index of CdS contributes to the photonic crystals’ low-angle dependence and vivid structural colors. Then, a variety of fluorescent molecules were doped into poly(ethylene glycol) diacrylate (PEGDA) hydrogel and combined with photonic crystals with distinct structural colors to prepare three distinct colors of SFC-CPH. We also investigated the optical characteristics and surface properties of these photonic crystal hydrogels. Based on these dual-mode display characteristics, we designed several dual-mode display patterns and a method for information encoding. The unique property of this photonic crystal hydrogel material suggests its substantial potential for applications in information storage, security, and encoding, offering innovative avenues in the realm of information display.
研究领域:
材料科学
·
光学
·
纳米技术
·
信息技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Kewei Ma,Yuhang Sheng,Guizhen Wang,Xiaowei Zhang,Yunsong Di,Cihui Liu,Liyan Yu,Lifeng Dong,Zhixing Gan
Mn 2+ doping has been developed to modulate the photoluminescence (PL) of CsPbCl 3 perovskite quantum dots (PQDs). However, the doped Mn 2+ may be expelled from the PQDs host with the long-term storing, resulting in inferior stability. Herein, CsPbCl 3 PQDs doped with different concentrations of Mn 2+ (Mn:CsPbCl 3 ) are prepared by a hot injection method. Our photostability tests reveal that when the doping concentration is <25%, or 40%–50%, the Mn 2+ doped PQDs are intrinsically stable. Anion exchange reactions are conducted between the stable CsPb 0.796 Mn 0.204 Cl 3 and CsPbBr 3 PQDs. Fluorescence color gamut of the resulting Mn:CsPb(Cl/Br) 3 PQDs almost covers the entire visible spectrum except for the deep red color. Benefiting from the intrinsic stability and wide color gamut, multicolor solid-state luminescence are acquired by incorporating the Mn:CsPb(Cl/Br) 3 PQDs in polymethyl methacrylate (PMMA) matrices, which are used as color converters for constructing light-emitting diodes (LEDs) with different colors.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Ziqiang Tian,Maoyuan Huang,Qi Zhong,Xiaomeng Gong,Jia Guo,Ruiqian Guo,Changchun Wang
The design and fabrication of photonic crystals with multiple optical states are significant and urgently desired. However, most conventional photonic crystals with scalable potential display only a single structural color mode, limiting their practical application. Herein, we successfully achieved a new type of dual-mode photonic crystal films through the co-assembly of polymer colloidal core@shell nanoparticles and InP@ZnS quantum dots at room temperature. The co-assembly process was completed with high efficiency by a powerful assembly technique called molecule-mediated shearing-induced assembly technique (MSAT). The obtained dual-mode photonic crystal films possessed two distinct optical states, including a structural color mode and a fluorescent color mode. The advantages of both photonic band gaps and fluorescence emission were synchronously integrated, exhibiting bright structural colors and vibrant fluorescent colors under sunlight irradiation and ultraviolet excitation, respectively. The switch of the two optical states was highly reversible and stable. Besides, we also found that the dual-mode photonic crystal films realized enhanced fluorescent emission from the slow photon effect, and the relationship between the fluorescence enhancement effect and order degrees of dual-mode PC films was studied. Finally, the dual-mode photonic crystal films were employed to design a visual coding-decoding system, and also as raw materials to produce anti-counterfeiting photonic paints. All the experiments provided a novel insight for achieving multiple optical states within a single system, creating opportunities for extending the application of photonic crystals in the realm of information storage, anti-counterfeiting, response materials, and pattern display.
研究领域:
光学材料
·
光子学
·
纳米技术
·
材料科学
·
荧光光谱学
·
信息安全
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）