Advanced Optical Materials
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2024
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IF 8
Xinran Wang,Heng Dai,Baozhu Li,Xuhui Xu,Jian Zhang,Daiyuan Liu,Yichun Liu,Zhichao Liu
Optical materials have attracted much attention in anti-counterfeiting applications due to their visualization and multi-emission modes. However, the unit occupancy predestines the material to only monochromatic emission, inhibiting the application of optical materials in advanced information encryption. Here, a green to yellow to deep-red phosphor is reported in a Mn 2+ -activated garnet compound Ca 2 YMgScSi 3 O 12 : Mn 2+ (CYMSS: Mn 2+ ), originating from the abundant lattice sites occupying within the crystal structure by Mn 2+ ions. Three different photoluminescence (PL) emission bands peaked at 517, 576, and 720 nm from 4 T 1 (G) → 6 A 1 (S) are observed, which are attributed to the substitution of [Sc/MgO 6 ] octahedron and [Ca/YO 8 ] dodecahedron sites by Mn 2+ ions, respectively. Hence, tunable emissions from green to deep-red are realized in single Mn 2+ doping by switching the excitation source of ultraviolet (UV)/blue and X-ray, which can be further regulated by varying the Mn 2+ concentration. Multi-position occupying, color-tunable light-emitting materials offer the possibility of more advanced optical information encryption.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhou Yuan,Le Han,Yuchi Zhang,Lufang He,Peng Liu,Yan Xu
Self-assembled inorganic metal halide perovskite composites with high emitting efficiency, tunable multimode emission and stimuli-responsive luminescence demonstrated great potential in diversified luminescence applications. Here, a novel CsPbBr 3 /EuWO 4 (OH) composite was successfully prepared through the surface adsorption of Pb 2+ ions on hydroxylated EuWO 4 (OH) microsheets and subsequent nucleation of CsPbBr 3 peroviskite quantum dots (PQDs) by the anti-solvent crystallization in CsBr containing N,N-dimethylformamide (DMF) solution. Due to the distinct fluorescent thermochromic switching properties of temperature-insensitive Eu 3+ and sensitive CsPbBr 3 PQDs emitting centers, the resultant CsPbBr 3 /EuWO 4 (OH) composite exhibits excellent ratiometric temperature sensing performance. The CsPbBr 3 /EuWO 4 (OH) thermometer based on the fluorescence intensity ratio (FIR) technique originating from emissions of Eu 3+ to CsPbBr 3 PQDs was then explored with a high temperature sensitivity (S r ) of 5.8 % ℃ −1 at 54 ℃. In addition, a high-security-level information encryption scheme was proposed by utilizing the excitation-wavelength-dependent switchable fluorescence of CsPbBr 3 /EuWO 4 (OH) composite. This study provides a simple and feasible strategy for assembling dual-emission CsPbBr 3 /EuWO 4 (OH) composite, showing potential applications in optical ratiometric thermometry and information encryption fields.
研究领域:
材料科学
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光学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yan Shen,Tianjing Zhang,Haoran Zhao,Yu Xiao,Jie Hong,Mohamed Abbas,Wanliang Yang
Portable and reusable solid-state fluorescence sensors have received much attention in the field of metal ion detection as a superior alternative to traditional liquid-based fluorescence sensors. In this study, a novel HHSS@LaVO 4 :Eu 3+ /polyacrylamide/sodium alginate (HLE/PS) hydrogel was successfully constructed for portable dynamic fluorescence switching detection of Fe 3+ and encryption of security information. The HLE/PS hydrogel was synthesized from HHSS@LaVO 4 :Eu 3+ fluorescent nanofillers embedded in a semi-IPN network of polyacrylamide (PAM) and sodium alginate (SA). The HLE/PS hydrogel has demonstrated excellent performance in the detection of Fe 3+ in aqueous solutions with high selectivity, high sensitivity, fast response (8 min), wide detection range (2–1000 μM), low detection limit (0.78 μM) and ease of use. It can be reused up to five times, underlining its utility and economy as a good performance fluorescence sensor. Notably, the quenching of Fe 3+ fluorescence by ultrasmall LaVO 4 :Eu 3+ nanoparticles on HHSS supports was significantly enhanced compared to conventional large-sized rare earth phosphor fillers. Additionally, by exploiting the reversible fluorescence switching function of the HLE/PS hydrogel, we further developed a high-security multi-layer information encryption platform. Finally, we thoroughly investigated the fluorescence response mechanism of HLE/PS hydrogels to Fe 3+ ions. This work not only provides a representative case for the preparation of packed rare-earth fluorescent hydrogels, but also demonstrates their potential as multifunctional smart luminescent materials.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2021
·
IF 15.881
Jinglin Shen,Qianwen Xiao,Panpan Sun,Jin Feng,Xia Xin,You Yu,Wei Qi
The self-assembly of chiral metal nanoclusters into supramolecular chiral aggregates is of interest for developing advanced materials. Herein, we manipulated the self-assembly of Au nanoclusters modified by l-/d-cysteine (l-/d-AuNCs) into ordered microstructures featuring enhanced phosphorescence and optical activities. The formation of these aggregates was driven by synergistic effect of coordination and electrostatic interactions assisted by Cd2+/H+. Detailed structural characterization and theoretical studies confirmed that the compact aggregation structures are essential for the emission enhancement and the chirality amplification of l-/d-AuNCs. Interestingly, upon the formation of microflowers, the emission lifetime was prolonged to 3.34 ms with a switch from fluorescence to phosphorescence induced by aurophilic Au(I)···Au(I) interactions and intensive ligand-to-metal charge transfer (LMCT). Moreover, both the CD and photoluminescence (PL) signals of the microflowers exhibited pH-responsiveness. This dual-mode sensitive platform could be developed as a pH sensor with improved accuracy. Additionally, the pH-responsive photoluminescence ON/OFF switch of the microflowers could be employed for reliable information encryption and decryption. This study provides useful ideas for regulating the self-assembly of nanoclusters to generate desired photophysical properties with potential applications.
研究领域:
材料科学
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光学
·
化学
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Huajiang Hu,Jiurong Li,Xiao Gong
Due to their unique fluorescence properties and wide range of applications, carbon dots (CDs) have emerged as a prominent research subject. Acid reagents have traditionally been regarded as versatile means to facilitate the carbonization and polymerization of CDs, resulting in increased carbonization and polymerization levels, which in turn cause a redshift in the luminescence of CDs. However, there has been limited investigation into the impact of excess acid reagents on CDs luminescence. In this study, we discovered that the addition of excess acid reagent, in the presence of oxygen-containing functional groups, does not enhance the graphitization of CDs, but rather, it has the opposite effect. Excess acid reagents prevent CDs polymerization and reduce the content of graphite-N in the CDs. Simultaneously, excess acid reagent leads to an increase in oxygen-containing functional groups on the surface of the CDs, resulting in a blueshift in luminescence. Building upon these findings, we have devised a synthesis scheme for full-color CDs that cover nearly the entire visible light spectrum. Furthermore, leveraging the diverse color range, we have also employed these CDs for anti-counterfeiting encryption and LEDs applications.
研究领域:
材料科学
·
光学
·
化学
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产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 22
·7623
·
IF 4.6
Yangbo Wang,Yingdong Han,Runfa Liu,Cunping Duan,Huaiyong Li
Efficient control over lanthanide luminescence by regulating excitations offers a real-time and reversible luminescence-managing strategy, which is of great importance and highly desirable for various applications, including multicolor display and information encryption. Herein, we studied the crystal structure, luminescence properties, and mechanisms of undoped and Tb3+/Eu3+-doped CaZrO3in detail. The intrinsic purple-blue luminescence from host CaZrO3and the introduced green/red luminescence from guest dopants Tb3+/Eu3+were found to have different excitation mechanisms and, therefore, different excitation wavelength ranges. This enables the regulation of luminescent color through controlling the excitation wavelengths of Tb3+/Eu3+-doped CaZrO3. Furthermore, preliminary applications for information encryption with these materials were demonstrated using portable UV lamps of 254 and 302 nm. This study not only promotes the development of multicolor luminescence regulation in fixed-composition materials, but also advances the practical applications of lanthanide luminescent materials in visually readable, high-level anti-counterfeiting and information encryption.Keywords:luminescence;lanthanide;multicolor emission;luminescence regulation;information encryption
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yawen Li,Xuefan Qiu,Chencan Li,Zhihan Sun,Wei Qiu,Ling Wang
The dynamic control of fluorescence intensity in a time-dependent manner is crucial for enhancing the complexity of dynamic information encryption. In this study, we introduce a new system that combines a pH-responsive microgel with a non-equilibrium Eu-containing polyoxometalate. This system is created through dissipative self-assembly based on urease, enabling precise regulation of fluorescence intensity on a time scale. This intelligent fluorescent system exhibits potential applications in fluorescent ink, enzymatic logic gate and information encryption. Moreover, by simply manipulating the concentration of urease, the lifetime of encoded information can be accurately regulated. These time-encoding characteristics endow Eu-containing polyoxometalate with significant potential for advanced information encryption and data storage.
研究领域:
材料科学
·
生物化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Ziqian Lv,Hanyu Xu,Zhiying Wang,Mochen Jia,Yanling Wei,Zuoling Fu
The composite of biocompatible carbon dots (CDs) and lanthanide-based luminescent materials have high research value as a promising multifunctional material, which are ideally suited to information encryption and white LED. However, the aggregation-induced quenching of CDs in the solid state still troubles the synthesis of CDs with other solid luminescent materials. Herein, a facile strategy to fabricate polychromatic nanoplatform KLa(MoO 4 ) 2 : Eu 3+ @CDs by encapsulating CDs on the surface of KLM: Eu 3+ with silicon shell is reported, in which the aggregation-induced quenching of CDs is avoided. Due to the overlapping of Eu-O charge transfer band with CDs excitation band, the red luminescence of Eu 3+ ions and the blue fluorescence of can be emitted simultaneously under 395 nm excitation. By changing the proportion of KLa(MoO 4 ) 2 : Eu 3+ in KLa(MoO 4 ) 2 : Eu 3+ @CDs, the mixture can emit "warm", "neutral", and "cold" white light, which can realize people's demand for indoor lighting requirements. Furthermore, a multi-mode information encryption by selectively triggering the luminescence of CDs or Eu 3+ ions is also designed. All the results suggest that KLa(MoO 4 ) 2 : Eu 3+ @CDs have excellent luminescence properties that can be further investigated and applied in the field of white LEDs and information encryption.
研究领域:
材料科学
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光学
·
信息加密技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bingbing Cui,Chuanpan Guo,Zhihong Zhang,Guodong Fu
Heterojunction engineering is an acceptable strategy in promoting the separation efficiency of electron/hole pairs in the photochromic process. Here, a series of novel solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions have been designed and prepared in the current study. The cubic ZnCo-PBA were selected as templates to directly grow WO 2.72 amorphous layer using phosphotungstic acid (PW 12 ) as precursors with the assistance of polyvinyl pyrrolidone (PVP). The as-obtained ZnCo-PBA@WO 2.72 heterojunctions have a core–shell structure and the appropriate band energy promote the UV-generated electrons transport from ZnCo-PBA to WO 2.72 . Consequently, the ZnCo-PBA@WO 2.72 heterojunctions exhibit excellent photochromic performance, converting from white to light-grey in 10 s and finally turning into dark-grey in 60 s under UV lamp stimulation. Meanwhile, the WO 2.72 outer layer was more easily in contact with oxygen in air and thus speeds up the oxidation process of W 5+ to W 6+ , allowing the colored ZnCo-PBA@WO 2.72 heterojunctions to return to their original colorless condition within 15 min. The solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions was then used as repeatable information storage media, data encryption and decryption based on coloration-decoloration behaviors. This study presents a meaningful way to integrate WO 2.72 with MOFs to expand the range of photochromic materials and further to broaden theirs application in optical devices.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3131-3138
·
IF 7
Lin Liu,Jixuan Xu,Yiang Li,Shanshan Peng,Peng Lin,Hongyun Zhong,Liang Song,Junpeng Shi,Xia Sun,Yun Zhang
Recently, persistent luminescence materials (PLMs) have attracted extensive attention in the anti-counterfeiting and information encryption fields. Unfortunately, single visible persistent luminescence (PersL) demonstrates limited information security because the changes in information coded by visible PersL can be observed by the human eyes. In this work, we develop a dual-mode PLM with ultraviolet (UV) and visible PersL, Mg3Lu2Ge3O12:Bi3+,Re3+ (Re3+ = Pr3+ and Tb3+) (MLGO:Bi3+,Re3+). The emitter Bi3+ yields invisible UV PersL, and the emitter Re3+ exhibits visible PersL. The color of visible PersL can be changed upon variation of the Re3+ content. Because the UV PersL hidden behind visible PersL is invisible to the human eyes, the capacity of invisible information encryption can be realized. With a specific filter and a charge coupled device camera for detection, the encrypted optical information will appear. Based on the dual-mode PLM with UV and visible PersL, we design the four-mode information encryption method and display excellent information encryption capability.
研究领域:
材料科学
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光学
·
安全与加密
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Feng Zeyu,Li Jialei,Yang Peng,Xu Xiangxiang,Wang Di,Li Jiahe,Zhang Chutian,Li Jingguo,Zhang Hongli,Zou Gang,Chen Xin
Multimodal optical-materials are highly desirable due to their advantages in enhancing information security, though independent modulation is challenging, especially accurately controlling the orthogonal relationship between the structural coloration (SC) and fluorescence (FL) pattern. Herein, we report a strategy which combines programmable structural coloration and switchable circularly polarized luminescence (CPL) for multimodal information encryption. Using photomask with aligned grating, programmable periodic patterns are fabricated on a polydiacetylene (PDA) gel film, which produces image in tunable structural colors. Introducing a chiral fluorescence layer containing perovskite nanocrystals and twisted-stacking Ag nanowires (NWs) bilayers, which provides stimuli-responsive FL and CPL with high dissymmetry factor ( g lum , up to 1.3). Importantly, the structural coloration information and FL patterns (including CPL pattern) can be independently modulated without mutual interference, even selectively concealed or exposed by varying microstructure design of the cross-linked PDA gel or by acetonitrile treatment.
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
CARBON
·
2025
·
IF 11.6
Xia Ran,Yatao Pan,Lulu Qiao,Lin Cai,Yihan Jia,Zhanpeng Liu,Lijun Guo
Afterglow photoluminescent (PL) carbon dots (CDs)-based materials with tunable and time-dependent colors are highly desirable for their potential applications in high-level information encryption and anti-counterfeiting, but their construction remains a significant challenge. Herein, we report several broadband and dynamic afterglow PL CDs@BA using 2,2′-Dithiodibenzoic acid (DTSA) as the precursor of CDs and boric acid (BA) as the matrix. A facile thermal treatment significantly regulates the distribution among the cyan-green emission edge states and red emission surface states associated with the oxygen-containing groups of CDs@BA. The balanced contributions from different emissive states with distinct spectra, lifetimes on both nanoseconds and milliseconds scales, and relative proportions endow the CDs@BA with the ultrabroad and afterglow PL that cover almost the entire visible region. The broadband PL under light excitation mainly originates from the emissions of different singlet states, and the broadband afterglow PL is attributed to the combined delayed fluorescence (DF) of different singlet-triplet states. In particular, CDs@BA demonstrates an evident time-dependent afterglow color changing from tangerine to cyan-green, due to an enhanced contribution to the afterglow from the red DF component. Furthermore, these CDs@BA manifest promising potentials for white-light display, optical encryption, and time-resolved anti-counterfeiting applications. Our findings provide an effective strategy to construct broadband and dynamic afterglow CDs-based materials and are significant for understanding the related photophysical mechanisms.
研究领域:
材料科学
·
光学
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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）