JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 10
·5857-5870
·
IF 2.599
Zhao Bei,Shen Dingyi,Tan Qinyue,Tang Jianfeng,Zhou Xianju,Hu Shanshan,Yang Jun
CaF 2 :Ln 3+ (Ln = Ce, Tb, Eu) phosphors with highly uniform shapes have been successfully synthesized by a simple hydrothermal method directly. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and lifetime. The results indicated that the pH values, organic additive and reaction time have a significant effect on the morphology and dimensions of CaF 2 microcrystals and the possible formation mechanism was also proposed. Furthermore, the energy transfer from Ce 3+ to Tb 3+ and from Tb 3+ to Eu 3+ and from Ce 3+ to Tb 3+ to Eu 3+ was observed and the corresponding mechanisms were discussed in detail. The CaF 2 :Ln 3+ phosphors may have potential optical applications in near-UV and violet LEDs.
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JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Zefeng Xu,Yuhan Zhu,Pu Fan,Qi Luo,Zongjie He,Xiaoguang Liu,Ling Li
A novel adjustable dual excited emission Eu 2+ /Eu 3+ co-doped Ca 4 Si 2 O 7 F 2 phosphor are reported. Unlike most of Eu 2+ doped inorganic compounds , in the host lattice Ca 4 Si 2 O 7 F 2 , partial Eu 3+ can still exist stably even in reducing atmosphere. The adjustable dual excited emission from blue light to red light can be found by changing the wavelength of excitation emission or the concentration of europium doped ion. The mechanism by which the two ions Eu 2+ and Eu 3+ can coexist in Ca 4 Si 2 O 7 F 2 is revealed through the bond energy theory. Eu 2+ and Eu 3+ in Ca 4 Si 2 O 7 F 2 system can be demonstrated to occupy the Ca1 lattice of Ca 4 Si 2 O 7 F 2 .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Guochen Wei,Siqi Quan,Jingting Zhang,Shuangni Shi,Linge Nian,Huixia He,Jianxi Xiao
The development of multifunctional bioinks that simultaneously possess robust mechanical properties, bioactivity, and high printability remains a central challenge in tissue engineering. In this study, a biofunctional 3D-printable hydrogel based on a collagen-mimetic peptide (CMP) and sodium alginate (SA) was constructed for the treatment of full-thickness skin defects. Europium ions (Eu 3+ ) coordinated with both the carboxyl groups of SA and the aspartic acid residues of the CMP-DD peptide, forming a reinforced dual-network structure with enhanced stability and mechanical strength, which enables precise extrusion-based 3D printing with excellent shape fidelity. Subsequent incorporation of calcium ions (Ca 2+ ) for secondary crosslinking further endows the hydrogel with tunable elasticity and superior structural durability. The composite hydrogel significantly promoted cell adhesion and proliferation, while exhibiting pronounced antibacterial and anti-inflammatory properties. In a Sprague–Dawley rat full-thickness skin defect model, it significantly accelerates wound healing, enhances granulation tissue formation, promotes collagen deposition, and improves re-epithelialization. This dual-coordination CMP-based composite hydrogel integrates outstanding mechanical performance, bioactivity, and printability, offering an innovative and promising strategy for the design of high-performance bioinks and the advancement of skin tissue regeneration.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Yujie Liang,Ruoshan Lei,Yun He,Shilong Zhao,Feifei Huang,Lei Lei
To develop novel luminescent materials with optical thermometry and anti-counterfeiting functionalities, this work designed, prepared, and characterized a series of Sc 2 Mo 3 O 12 : Eu 3+ (SMOE) phosphors and SMOE/g-C 3 N 4 composites. Structural and optical analyses reveal that SMOE exhibits two-dimensional negative thermal expansion (NTE) behavior and high resistance to luminescence concentration quenching. Via vapor deposition, g-C 3 N 4 was deposited onto SMOE particles, slightly enhancing their NTE performance. Upon UV excitation, SMOE/g-C 3 N 4 shows dual-emission characteristics featuring blue luminescence from g-C 3 N 4 and red-orange emissions from Eu 3+ , with different dependencies on excitation wavelength. Additionally, the g-C 3 N 4 emission band undergoes spectral narrowing and fast thermal quenching with increasing temperature, in contrast to the relatively stable Eu 3+ emissions. These divergent thermal responses enable five independent thermometric parameters (luminescence intensity ratios, spectral bandwidth, and individual emission intensities) to exhibit linear temperature dependence. A multi-parameter sensing strategy based on a multiple linear regression model yields a maximal relative sensitivity of an exceptional 30%/K, surpassing single-parameter approaches and outperforming most previously reported optical thermometers. Moreover, SMOE/g-C 3 N 4 is proved to be highly suitable for anti-counterfeiting labels, as its luminescence color can be switched by controlling the excitation conditions. Overall, SMOE/g-C 3 N 4 is a highly promising dual-functional material coupled with excellent thermal sensing and anti-counterfeiting capabilities.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yuchen Xie,Jingang Guo,Shuang Ding,Xuemei Deng,Songlin Tan,Qingming Chen,Yule Li,Hui Zhang
La 0.7 Ca 0.3 MnO 3 ceramics have garnered significant attention from researchers due to their intriguing magnetoelectric properties and their potential applications in components for infrared detection and magnetic sensing devices. However, the magnetoelectric transport mechanisms within the material require detailed examination, and its properties must be further refined to better support practical implementation. In this study, we synthesized Eu 3+ doped La 0.7− x Eu x Ca 0.3 MnO 3 (LECMO) using the sol–gel technique and analyzed its structure, surface morphology, resistivity, temperature coefficient of resistance (TCR), and magnetoresistance (MR) properties. According to the x-ray diffractometer results, the lattice parameters and unit cell volume decrease with increasing Eu 3+ content. Scanning electron microscope analysis confirms the excellent sintering quality of the samples and a homogeneous distribution of elements. The electrical transport properties at low temperatures were studied using various competitive scattering mechanisms. The variable-range hopping model and small polaron hopping model were employed to investigate the electrical transport mechanisms at high temperatures, whereas the phenomenological percolation model was used to analyze the transport characteristics in the transition region. Moreover, the TCR of LECMO ceramics was enhanced to 41.14% K −1 , and the MR value reached 92.73%. Such improvements offer LECMO ceramics greater prospects for practical applications.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Zhichao Liu,Xue Yu,Xiuxia Yang,Qingpeng Peng,Xiaodie Zhu,Xuhui Xu,Jianbei Qiu
Featured with a tunable excitation/emission wavelength and excellent physicochemical stability, inorganic fluorescent materials are widely used in the fields of anti-counterfeiting. Here, we design a multi-stimuli-responsive dynamic fluorescence and phosphorescence anti-counterfeiting material by introducing Eu3+ ions in NaGdGeO4: Bi3+ to tailor the trap structure. The photoluminescence (PL), long persistent luminescence (LPL), and photo-stimulated luminescence (PSL) colors of NaGdGeO4: Bi3+, Eu3+ can be switched by varying the excitation modes (ultraviolet, near infrared, and X-ray light). Especially, the LPL and PSL colors of NaGdGeO4: Bi3+, Eu3+ vary with increasing decay and stimulation times. In addition, X-ray excitation ensures the specificity of the luminescence of NaGdGeO4: Bi3+, Eu3+ compared with ultraviolet excitation. This rapidly-changing-color fluorescent material offers the possibility of sophisticated anti-counterfeiting applications in the future.
研究领域:
材料科学
·
发光材料
·
光学工程
·
防伪技术
·
磷光体设计
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JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Bin Ma,Ke Su,Qianxin Zhang,Yunping Shi,Bowen Xiong,Xiaoqin Ma
Novel Sr 9 R(PO 4 ) 7 (R = In, Ga) host materials for Eu 3+ - doped phosphors were synthesized by a high-temperature solid-state reaction method. The crystal structure, luminescence properties and thermal stability of the phosphors were explored. The phase analysis indicated that the phosphors crystallized in monoclinic structure, the emission spectra of both In and Ga containing phosphors were mainly composed of two sharp peaks centered at about 591 and 617 nm, corresponding to the 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 transitions of Eu 3+ ions. While, the relative emission and excitation intensities of Sr 9 In(PO 4 ) 7 : Eu 3+ were weaker than Sr 9 Ga(PO 4 ) 7 : Eu 3+ . Moreover, the energy transfer mechanism among Eu 3+ ions in the phosphors depended upon energy transfer among the nearest-neighbor ions described by the Dexter theory. The selected Sr 9 In(PO 4 ) 7 : 0.06Eu 3+ and Sr 9 Ga(PO 4 ) 7 : 0.06Eu 3+ exhibited high thermal stability and the chromaticity coordinate of the phosphors were located in the red-orange light region.
研究领域:
材料科学
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发光材料
·
固态化学
·
光学物理
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Inorganics
·
2026
·Vol. 14
·期 9
·235
·
IF 3.4
Zhengrong Xia,Rongqing Li,Fangfang Liu,Yue Tong,Wang Zhao,Mingjun Song,Weiwei Zhou
Near-ultraviolet-excitable red phosphors with high thermal stability are desirable for phosphor-converted LED applications, including potential plant-lighting applications. Herein, Sm3+- and Eu3+-activated Na3YB8O15phosphors were synthesized by a high-temperature solid-state reaction. Among the investigated compositions, the optimal activator contents were identified asx= 0.02 for Na3YB8O15:xSm3+andy= 0.70 for Na3YB8O15:yEu3+, with concentration quenching in both series mainly governed by dipole–dipole interactions. In the Sm3+/Eu3+co-doped phosphors, the emission color shifted from orange-red toward red as the Eu3+content increased. At 433 K, the Sm3+-doped, Eu3+-doped, and Sm3+/Eu3+co-doped samples retained 119.7%, 93.4%, and 102.3% of their room-temperature integrated emission intensities, respectively. The high thermal stability may be attributed to the structural characteristics of the host, its wide optical band gap, and the temperature-dependent redistribution of Stark and phonon-assisted emission components. A phosphor-converted LED fabricated using Na3YB8O15:0.02Sm3+,0.01Eu3+and a commercial 400–405 nm, 5 W near-UV LED chip produced multiband emission that partially overlapped with the absorption bands of both chlorophylls and the PRand PFRforms of phytochrome. These results suggest that Sm3+/Eu3+-activated Na3YB8O15is a promising thermally robust, spectrum-adjustable red phosphor for LED applications.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 12
·6597
·
IF 6.208
Yaowei Guo,Jin Liu,Qinglin Tang,Cuicui Li,Yanying Zhang,Yao Wang,Yanxin Wang,Yupeng Bi,Christopher D. Snow,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
The clinical use of anticancer drugs necessitates new technologies for their safe, sensitive, and selective detection. In this article, lanthanide (Eu3+and Tb3+)-loaded γ-cyclodextrin nano-aggregates (ECA and TCA) are reported, which sensitively detects the anticancer drug irinotecan by fluorescence intensity changes. Fluorescent lanthanide (Eu3+and Tb3+) complexes exhibit high fluorescence intensity, narrow and distinct emission bands, long fluorescence lifetime, and insensitivity to photobleaching. However, these lanthanide (Eu3+and Tb3+) complexes are essentially hydrophobic, toxic, and non-biocompatible. Lanthanide (Eu3+and Tb3+) complexes were loaded into naturally hydrophilic γ-cyclodextrin to form fluorescent nano-aggregates. The biological nontoxicity and cytocompatibility of ECA and TCA fluorescent nanoparticles were demonstrated by cytotoxicity experiments. The ECA and TCA fluorescence nanosensors can detect irinotecan selectively and sensitively through the change of fluorescence intensity, with detection limits of 6.80 μM and 2.89 μM, respectively. ECA can safely detect irinotecan in the cellular environment, while TCA can detect irinotecan intracellularly and is suitable for cell labeling.Keywords:lanthanide (Eu3+, Tb3+) complex;γ-cyclodextrin;nano-aggregate;sensing;anticancer drug;irinotecan
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 14
·11174-11183
·
IF 2.779
Cui Zheng,Deng Guowei,Xu Pan,Liu Xiaoyang,Yang Min,Wang Qiliang
In this work, doped and co-doped LaNbO 4 :RE 3+ (RE = Eu, Eu/Tb, Tb) single crystals were prepared by a unique hydrothermal method under the condition of supercritical water and a wide temperature range (823–923 K). The crystal structure of LaNbO 4 :Eu 3+ /Tb 3+ were refined by virtue of the Rietveld method, which can determine the occupation position of dopants. The luminescence properties of Eu 3+ /Tb 3+ -doped LaNbO 4 phosphors were carefully measured and analyzed by diffuse reflectance spectra and ultraviolet. The energy transfer was recognized between host and doped Eu 3+ /Tb 3+ ions based on the luminescence spectra and decay lifetimes, which is dominated by electric multipolar interaction. The results show that the strong emission peaks at 491 nm ( 5 D 4 – 7 F 6 ), 550 nm ( 5 D 4 – 7 F 5 ), 590 nm ( 5 D 4 – 7 F 4 ), 623 nm ( 5 D 4 – 7 F 3 ) can be observed at the optimum reaction temperature of 650 °C, corresponding to CIE coordinates (0.3398, 0.3288). By adjusting the concentration of Eu 3+ /Tb 3+ ions, the emission colors of LaNbO 4 :Eu 3+ /Tb 3+ are varied from blue to pink and to white. Consequently, the synthesis strategy reported herein not only holds extensive promise for expanding the preparation techniques of materials with good luminescence properties but also promotes the practical applications of LaNbO 4 single crystal in low color temperature and high index white light-emitting diode (WLED).
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Photonics Research
·
2021
·Vol. 9
·期 12
·2369-2380
·
IF 7.08
Yao Tong,Qin Wang,Heng Yang,Xiaoting Liu,Enrou Mei,Xiaojuan Liang,Xiaojuan Liang,Zhijun Zhang,Zhijun Zhang,Weidong Xiang
As an emerging scintillation material, metal halide perovskite (CsPbX3) has been deemed the most potentially valuable candidate in X-ray detection and medical imaging. Nevertheless, it is a continuing challenge to implement efficient radioluminescence (RL) with high radiation stability and moisture resistance. Moreover, the optimized luminescence properties and excellent uniformity of CsPbX3 glass are also key points for obtaining perfect X-ray images. Herein, we have successfully precipitated Eu3+-doped CsPbBr3 nanocrystals (NCs) with improved photoluminescence quantum yield (≈58.6%) because partial Eu3+ entered the perovskite lattice in a robust borosilicate glass matrix by in situ crystallization. The small amount of Eu addition made the lattice of NCs shrink and promoted uniform distribution of CsPbBr3 NCs in the glass, which effectively reduced the light scattering of the sample. Subsequently, multimodal RL intensity of the CsPbBr3/CsPbBr3:xEu NCs glasses (CPB-0Eu/CPB-xEu) as a function of X-ray dose rate showed a superlinear relationship to the benefit of obtaining satisfactory X-ray images. Also, the outstanding radiation stability and water resistance of CPB-xEu were confirmed due to the protection of the robust glass matrix. Finally, an X-ray imaging system using a CPB-xEu scintillator was constructed, and the spring in the opaque sample was legibly detected under the motivation of X-rays, indicating that CsPbX3 glasses possess extensive application prospects in terms of X-ray detection and medical imaging.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Xidian Yue,Qing Hua,Wenjuan Zhang,Feiyan Tang,Xiaobing Wang,Feng Luan,Xuming Zhuang,Chunyuan Tian
In this work, europium ion-doped gadolinium trioxide nanocrystals (Gd 2 O 3 :Eu 3+ NCs) were successfully synthesized and applied to construct an electrochemiluminescence (ECL) sensor. Compared with pure Gd 2 O 3 , the doping of Eu 3+ ions caused enhanced ECL intensity and more stable signals. Based on the excellent ECL performance of Gd 2 O 3 :Eu 3+ NCs, we constructed a new ECL sensing platform for the detection of organophosphorus pesticides (OPs). The ECL sensor showed a good linear relationship in the concentration range of 1 nM to 1 pM, with a limit of detection of 0.12 pM (S/N = 3) for dichlorvos (DDVP). In addition, the constructed ECL sensor was applied for the detection of DDVP in vegetable samples, and good recoveries were obtained. The results indicated that the ECL sensor exhibited fantastic performance properties and had good application prospects in OPs detection.
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