Advanced Materials Technologies
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2024
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IF 6.4
Xi Li,Junlu Sun,Wentao Huang,Fuhang Jiao,Yuan Deng,Wei Zhang,Ying Xiao,Chong-Xin Shan,Lin Dong
As the Internet of Things (IoT) continues its pervasive influence and digital technologies increasingly weave into the fabric of daily lives, the imperative for robust security measures becomes paramount to mitigate the escalating risks to the digital landscape. Traditional anti-counterfeiting technologies, while capable to some extent, are constrained by factors such as material toxicity, low-security efficacy, and intricate fabrication process. Mechanoluminescent materials have shown great potential in the areas of anti-counterfeiting and security. Here, a multicolor mechanoluminescent (ML) material (lanthanide doped Ca 2 B 2 O 5 ) synthesized by solid-phase reaction is reported for the first time at a relatively lower temperature of 750 °C. The ML devices are obtained by embedding ML materials into polydimethylsiloxane elastomer, allowing for stress visualization with colors ranging from blue and green to orange and red. Through elaborate co-doping, successive and accurate stress visualizations are realized. Finally, security labels based on the lanthanide ions doped Ca 2 B 2 O 5 are prepared and also demonstrated to safeguard valuable packages. This work provides a novel multicolor ML material and pioneers its use in security labels, offering a universal solution for multicolor display, information security, dynamic anti-counterfeiting, and other potential applications within the realm of IoT.
研究领域:
材料科学
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光学
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安全技术
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纳米技术
·
化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Sisi Li,Yajing Cai,Jiaying Situ,Biwen Wang,Beichen Ying,Jin He,Zhao-Qing Liu,Jianle Zhuang,Yibo Chen
Multi-mode responsive optical materials with versatile application prospects for optical sensing, optoelectrical devices, and information encryption are highly desired. Here we integrate fluorescent carbon dots onto the hollow MnO 2 spheres, and modulate the interaction between them to achieve a water-stimulated responsive system with dual-mode dynamic signals in both fluorescence and structural color. The composite film shows a structural color shifting from blue to green as well as displays a fluorescence “on” in the presence of trace water, with both changes capable of being reversibly switched up to 10 times. The amide bond between the two components enables the controllable dispersion and aggregation of the carbon dots which is essential to the reversibility. Fabrication of several security labels with separate information in structural color and fluorescence channels demonstrates the application potential of the composite. This work provides a concise route to develop new multi-mode responsive optical materials for applications in anti-counterfeiting, sensing, and coding.
研究领域:
材料科学
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光学工程
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纳米技术
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产品关联
DOI
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-9
·
IF 11.878
Liu Yang,Han Fei,Li Fushan,Zhao Yan,Chen Maosheng,Xu Zhongwei,Zheng Xin,Hu Hailong,Yao Jianmin,Guo Tailiang,Lin Wanzhen,Zheng Yuanhui,You Baogui,Liu Pai,Li Yang,Qian Lei
An ideal anti-counterfeiting technique has to be inexpensive, mass-producible, nondestructive, unclonable and convenient for authentication. Although many anti-counterfeiting technologies have been developed, very few of them fulfill all the above requirements. Here we report a non-destructive, inkjet-printable, artificial intelligence (AI)-decodable and unclonable security label. The stochastic pinning points at the three-phase contact line of the ink droplets is crucial for the successful inkjet printing of the unclonable security labels. Upon the solvent evaporation, the three-phase contact lines are pinned around the pinning points, where the quantum dots in the ink droplets deposited on, forming physically unclonable flower-like patterns. By utilizing the RGB emission quantum dots, full-color fluorescence security labels can be produced. A convenient and reliable AI-based authentication strategy is developed, allowing for the fast authentication of the covert, unclonable flower-like dot patterns with different sharpness, brightness, rotations, amplifications and the mixture of these parameters.
研究领域:
材料科学
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光学
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安全技术
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人工智能
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产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Hongrui Cheng,Song Chen,Min Li,Yongfeng Lu,Haixin Chen,Xiao Fang,Haijiang Qiu,Wensong Wang,Cheng Jiang,Yuanhui Zheng
Room temperature phosphorescence (RTP) materials have motivated massive attention due to their great advantages in anti-counterfeiting and optical encryption. However, the commonly used carbon-based RTP materials suffer from drawbacks of photobleaching, quenching and single phosphorescence color outputs, which obstruct their performance in high-level anti-counterfeiting techniques. Herein, we present a universal method for the fabrication of a [email protected] ( [email protected] 2 ) composite that possesses ultralong lifetime, high phosphorescence quantum efficiency (PQE), excellent luminescence stability, and dual-color phosphorescence emission. Taking advantage of the restriction by rigid network of SiO 2 and stable covalent bonding between CDs and SiO 2 , the triplet excited states of CDs are stabilized. As a result, the [email protected] 2 exhibit ultralong lifetime of 1.33 s and 0.38 s under excitation at 254 nm and 365 nm, respectively. Furthermore, the phosphorescence color of [email protected] 2 can change from cyan to yellow when the exciting wavelength switches from 254 nm to 365 nm. The obtained [email protected] 2 also exhibit outstanding characteristics of anti-photobleaching and phosphorescence stability in an aqueous solution. Based on the unique phosphorescent properties of the [email protected] 2 , a stable and dual-color phosphorescence security label is designed for advanced information encryption.
研究领域:
材料科学
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光学材料
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纳米技术
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防伪技术
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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
Xiaoyi Xu,Tingting Zhou,Yu Bing,Xukun Wang,Hongtao Jiang,Zhao Song,Tong Zhang
Real-time monitoring of carbon dioxide (CO 2 ) is imperative for medical diagnosis and effective environmental preservation. Despite the formidable challenge posed by the inherent chemical inertness of CO₂ molecules, a pioneering CO 2 sensor based on MOF-804 cofunctionalized with ionic liquid (IL) and m-cresol purple (mCP) is successfully developed. By ingeniously integrating hydrogen bonding, electrostatic interactions, and hydrophobic properties within the sensitive layer, the sensor achieves a state-of-the-art sensitivity (Δf = 384 Hz), an exceptionally vast detection range spanning 400–80 000 ppm, and remarkable stability with minimal sensitivity drift even at relative humidity (RH) levels exceeding 80%. Furthermore, the inherent gasochromic property, stemming from the zwitterionic mechanism, paves the way for innovative self-sustaining CO 2 test strips and groundbreaking applications, including CO 2 tracking and CO 2 -encrypted security labeling technology. Collectively, the realization of this ultra-sensitive and robust CO 2 monitoring approach, coupled with its CO 2 -triggered visual and multifunctional capabilities, opens up novel avenues for dynamic CO 2 detection, advanced military encryption strategies, and enhanced health management systems.
研究领域:
环境科学
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材料科学
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化学工程
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传感器技术
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医疗诊断
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安全技术
✓ 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）