JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoping Jiang,Yue Guo,Lixi Wang,Qitu Zhang
Multi-mode dynamic anti-counterfeiting materials can provide complex anti-counterfeiting performance and ensure the anti-counterfeiting strategy becomes more secure. Herein, a new type of multi-mode anti-counterfeiting encryption material of CaAl 12 O 19 :Eu, Er with different Er doping concentration was developed by sol–gel method. Interestingly, the CaAl 12 O 19 :Eu, Er phosphor and its composite have multi-mode anti-counterfeiting characteristics of multi-color down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism. Effect of different Er doping concentration on the down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism of CaAl 12 O 19 :Eu, Er was systematically investigated, and the relevant mechanisms were discussed. These anti-counterfeiting features can be simultaneously applied in both bright and dark fields, which can achieve high-level anti-counterfeiting in both spatial and temporal dimensions. The CaAl 12 O 19 :Eu, Er phosphors cannot be easily replaced by other materials with the same anti-counterfeiting properties. They display good application foreground in the field of anti-counterfeiting encryption.
研究领域:
材料科学
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光学
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防伪技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Wei-Guang Chen,Zhi-Jian Chen,Lei Zhang,Bin Wang,Ze-Zhong Lin,Rui Cao,Wei-Rong Wang,Yu Chen,Yong Wang
Smart materials with dynamic luminescence-color are potentially useful for sensors, displays and data storage devices. Herein a new photoresponsive luminescent material with a dynamic wide-range emission color was successfully developed through individually dispersing naphthalene diimide (NDI) possessing aliphatic carboxylic acid substitution on the diimide nitrogen atoms (NDI-COOH) into polymer matrix. Experiments and mechanism studies demonstrated that it was the photo-generated stable NDI radical anions that led to the unique photoresponsive dynamic emission color. Notably, a new mechanism involving twice energy transfer between NDI and NDI radical anions for photo-enhanced room-temperature phosphorescence (RTP) luminescence was presented. The present dynamic reversible emission approach, not only outlines a principle for the design of photo-induced radical anions with tunable luminescence, but also expands the scope of encryption and decryption of confidential information.
研究领域:
材料科学
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光电技术
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化学
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光子学
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信息技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
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2024
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IF 8
Rongyi Kuang,Huiwang Lian,Yunfei Zhu,Simin Gu,Lin Huang,Bo-Mei Liu,Jing Wang
Inorganic photochromic luminescent materials hold immense promise as potential candidates for optical information storage applications. Unfortunately, static and single reading mode of photochromic luminescent materials in bright and dark environments pose a security threat to the stored information. Here, a novel material La 2 MgSnO 6 :Er 3+ ,Fe 3+ is developed, possessing both reversible photochromic and adjustable upconversion/downconversion photoluminescent (PL) properties. Upon exposure to 275 nm ultraviolet (UV) light, the sample changes in color from white to brown. And this transformation rapidly reverses when exposed to 365 nm UV light, resulting in a corresponding alteration in luminescence intensity. Notably, when combined with photochromic, the 980 nm excited upconversion PL maintains stable luminescence, while the 365 nm excited downconversion PL exhibits significant intensity changes. Inspired by this unique feature, a dark-field selective dual-mode reading is proposed that depends on the excitation wavelength, including static decrypt in long-time cases and dynamic reading in time-limited situations. These findings have the potential to revolutionize high-security data storage applications and drive advancements in the field.
研究领域:
材料科学
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光电技术
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信息技术
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光子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Ziyi Bai,Lei Guo,Di Zhao,Yige Wang
Photoluminescent materials are widely used for information storage and anticounterfeiting, while most of them have the disadvantages of static information performance and weak processability, which is still a challenging task in developing dynamic anticounterfeiting materials with high security levels. Herein, we fabricated a novel photostimuli-responsive dual-emitting luminescent material UPTES-SPn-Tb-hfa, which was obtained by introducing the photochromic molecule spiropyran (SP) and lanthanide complex (Tb-hfa) into a siloxane-polyether matrix using the sol–gel process. Due to the conformation-dependent photochromic fluorescence resonance energy transfer between the Tb-hfa donor and SP acceptor, the ring-closing (SP)/ring-opening (MC) isomerization of the SP unit leads to a reversible luminescence switching in UPTES-SPn-Tb-hfa. This composite material has great potential for advanced anticounterfeiting because of the advantage of rapidly repeatable encryption/decryption for at least 8 times and dynamic luminescent colors within 15 s. In addition, due to its two luminescent centers (Tb3+ and MC), the luminescent color of this material can be regulated by 254 and 365 nm UV-light irradiation, which facilitates the design of multicolored anticounterfeiting labels. Our work presents a novel design methodology to fabricate dynamic anticounterfeiting materials, significantly enhancing the security of anticounterfeiting applications.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）