Article
Chemistry, Physical
Wanhang Li, Rui Hu, Xusheng Wang, Yanxia Li, Xi Yao
Summary: Rare earth-doped persistent luminescent phosphors are promising for anticounterfeiting due to their various luminescent colors and modes. In this study, a novel multicolor PersL material, Pr3+/Tb3+-doped LiTa3O8, was developed and applied for multimode anticounterfeiting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Shunni Dong, Qiguang Zang, Zhao-Yu Ma, Meiqi Tang, Zhi-Kang Xu, Jingjing Nie, Binyang Du, Jing Zhi Sun, Ben Zhong Tang
Summary: The proposal of the aggregation-induced emission (AIE) effect has shed light on the practical application of luminescent materials. Researchers have developed AIE-active luminescence microgels (TPEC MGs) with photo-induced color-changing behavior. The aqueous suspensions of TPEC MGs exhibit a significant AIE effect following the enhancement of quantum yield, and further increase in fluorescence intensity and blue-shift occur at elevated temperatures.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Jiawei Zhang, Zhijun Wang, Xiaoxue Huo, Yu Wang, Zhiping Yang, Dawei Wang, Jinxin Zhao, Panlai Li
Summary: Adjusting doping concentration can achieve deep red persistent luminescence with different durations and intensities; comprehensive analysis of material defects through thermoluminescence experiments led to significant improvement in long persistent luminescence; the dual-mode system is suitable not only for anti-counterfeiting, but also for multi-layer information encryption design.
DALTON TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Yun Zhao, Bingli Gu, Guoqiang Guo, Yanshuang Li, Tingting Li, Yuejin Zhu, Xu Wang, Da Chen
Summary: Blue, green, and red graphene quantum dots (GQDs) were synthesized and used for pattern printing and multicolor anticounterfeiting. White light-emitting diodes (LEDs) with high color rendering index and correlated color temperature were fabricated. This research expands the potential applications of GQDs in anticounterfeiting and LED technology.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Xiangkai Qiao, Lukman Kasim, Ailijiang Tuerdi, Guangzhi Hu, Abdukader Abdukayum
Summary: This study synthesized dual-wavelength afterglow PLNPs Zn0.2Ga1.1Si0.9O3.65:Cr (ZGSiO:Cr) using a hydrothermal method followed by calcination. The luminescence color and afterglow time of the PLNPs can be controlled by adjusting the content of Si4+. The as-prepared ZGSiO:Cr showed high-level, dynamic, and multimodal anticounterfeiting capabilities, with easy operation and low cost, providing a more convenient and effective method for multimode anticounterfeiting, encryption, and currency information tracking.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Robert N. Enright, Laura C. Bradley
Summary: Materials with complex curvature and micro-structured surface topography can replicate surfaces observed in nature. The self-wrinkling process allows polymer films to grow on 3D substrates, mimicking natural processes more closely. The amount of compressive stress can be controlled by changing deposition conditions. The wrinkle roundness increases with interface curvature on liquid substrates. The choice of wrinkle pattern can be directed by stress concentration or substrate curvature. The lowest energy ridge wrinkle state on the inside of a torus is oriented around the major axis. Controlling the substrate shape allows for the generation of materials with contrived surface topography.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Amal T. Mogharbel, Ahmed Hameed, Ali A. Sayqal, Hanadi A. Katouah, Salhah D. Al-Qahtani, Fawaz A. Saad, Nashwa M. El-Metwaly
Summary: This article introduces a method for preparing a self-healing authentication ink based on carboxymethyl cellulose (CMC) hydrogel immobilized with nitrogen-doped carbon dots (NCD) nanoparticles (NPs). The ink has high durability and self-healing properties, as well as excellent photostability and the ability to change to blue under UV light.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Chao Chen, Chiara A. Airoldi, Carlos A. Lugo, R. Konane Bay, Beverley J. Glover, Alfred J. Crosby
Summary: A hierarchical system has been developed to mimic the unique broad-angle structural color of flower petals, providing tunable structural color control. Laser diffraction measurements show that the observable angle of reflectance is broadened in proportion to the square root of the applied compressive strain.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ngei Katumo, Luis Arturo Ruiz-Preciado, Vinay Kumar, Gerardo Hernandez-Sosa, Bryce S. Richards, Ian A. Howard
Summary: Dynamic luminescent labels with tunable persistent lifetime can be created using Gd2O2S:Eu3+/Ti4+ phosphors, allowing for both overt and covert anticounterfeiting effects. These bright phosphors, excited by 375 nm light-emitting diodes, enable dynamic changes in luminescent images after excitation source is removed to be observed visually or through smartphone video analysis.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Nanoscience & Nanotechnology
Yujuan Qin, Yongju Bai, Pengcheng Huang, Fang-Ying Wu
Summary: Blue fluorescent carbon quantum dots were synthesized using the solvothermal strategy and were utilized to design an effective ratiometric fluorescence water sensor with rapid and sensitive detection of water content in organic solvents, showing great potential for anticounterfeiting.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Pengxiang Pei, Ruiping Wei, Binbin Wang, Junxia Su, Zhichao Zhang, Weisheng Liu
Summary: A multimodal La4GeO8: Eu2+, Er3+ material is reported, emitting various colors of light under different excitation wavelengths. The phosphor features excellent stability and humidity resistance, making it suitable for anticounterfeiting applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yuhui Yang, Huimin Zhao, Yuqing Li, Yilong Chen, Zhaohui Wang, Wei Wu, Leilei Hu, Jiangkun Zhu
Summary: We report a new invisible ink based on thin films, which have different decay times depending on the molar ratios of spiropyran (SP)/Si. Nanoporous silica is used as a substrate to improve the solid photochromism of spiropyran, but the hydroxyl groups in silica have a negative impact on the fade speeds. By modifying the silanol groups through sol-gel modification, we explore the potential application of spiropyran in UV printing and dynamic anticounterfeiting.
Article
Materials Science, Multidisciplinary
Wei Tang, Ping Liang, Xiaoxue Wang, Chen Zhang, Geng Wang, Chen Liang, Mingxiang Guan
Summary: The integration of photochromism and photoluminescence in a single material offers innovative applications in optical memory devices and multimode anti-counterfeiting. This study presents a novel strategy to create high-efficiency dynamic anti-counterfeiting materials by sintering Ba3MgSi2O8:Er3+ ceramics in a reducing atmosphere, resulting in reversible color change and fluorescence emission.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Xin Liu, Yinsheng Xu, Qianqian Liu, Wenjun Zhang
Summary: Metal-organic frameworks (MOFs) have multiple luminescent centers, and this study successfully prepared lanthanide-functionalized hybrid nanomaterial Eu3+/MOF(xHQ) using a simple postsynthetic modification method. The luminescence properties were investigated, and a preferential absorption enhancement (PAE) mechanism on the MOF was proposed. The material achieved multicolor emissions by changing the excitation wavelength, showing great potential in white light materials and anticounterfeiting applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Guodong Zhao, Yao Kou, Nan Song, Xiaohe Wei, Xiaoyong Zhai, Pengfei Feng, Feng Wang, Chun-Hua Yan, Yu Tang
Summary: The spoilage and forgery of perishable products such as food, drugs, and vaccines cause serious health hazards and economic loss every year. Developing highly efficient and convenient time-temperature indicators (TTIs) to realize quality monitoring and anticounterfeiting simultaneously is urgent but remains a challenge. In this work, a colorimetric fluorescent TTI based on CsPbBr3@SiO2 nanoparticles with tunable quenching kinetics is developed. The TTIs show an irreversible dynamic change in fluorescent colors from green to red upon increasing temperature and time, and a locking encryption system with multiple logics is also realized by combining TTIs with different kinetics.
Article
Multidisciplinary Sciences
Tianjiao Ma, Jing Bai, Tiantian Li, Shuai Chen, Xiaodong Ma, Jie Yin, Xuesong Jiang
Summary: This study demonstrates a novel adaptive visible camouflage strategy based on light-driven dynamic surface wrinkles. Through the photothermal effect-induced thermal expansion of pigment-PDMS in the bilayer system, wrinkles can be eliminated to adjust the visibility of colors effectively.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Nanoscience & Nanotechnology
Tianjiao Ma, Liangwei Zhou, Jianyu Hua, Jin Li, Xiaodong Ma, Wen Qiao, Jie Yin, Xuesong Jiang
Summary: A facile and feasible strategy is proposed in this study to construct a near-infrared radiation-driven dynamic diffraction grating based on a double-sided surface pattern, which is formed by wrinkles on both sides. Various adjustable diffraction patterns can be generated using this technique, showing potential applications in smart display, sensing, and imaging systems.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Luzhi Zhang, Jing Bai, Tianjiao Ma, Jie Yin, Xuesong Jiang
Summary: In this study, an intelligent surface strategy based on a bilayer wrinkle system is presented, which can output four types of binary code groups through the responsive pattern of fluorescence and wrinkle. By regulating temperature and light, reversible fluorescence and wrinkle patterns can be achieved. Various hierarchical oriented wrinkles with tunable fluorescence can be fabricated through light irradiation and photomasks.
Article
Chemistry, Multidisciplinary
Tianjiao Ma, Shuai Chen, Jin Li, Jie Yin, Xuesong Jiang
Summary: In this article, a wearable optical sensor based on surface wrinkles is introduced. The sensor can measure both the magnitude and direction of strain simultaneously, and achieve interactive visualization of slight strain due to the ultra-sensitivity of wrinkles and the nonlinearity of the optical signal.
MATERIALS HORIZONS
(2022)