CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Jie Chen,Xiuqing Zhou,Ye Sheng,Xiaoming Xie,Murad M.A. Abualrejal,Meiqi Chang,Zhan Shi,Haifeng Zou
A series of size controllable Tb 3+ and/or Eu 3+ activated nano-sized silica phosphors have been successfully synthesized through a facile sol-gel method. The structure, morphology, compositions, and luminescence properties of as-prepared samples were well investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and photoluminescence spectroscopy (PL). The results showed that all as-prepared samples were spherical nanoparticles but the sizes reduced gradually with the temperature increased from 25 °C to 65 °C, which was contrary to the BET surfaces as well as the luminescence intensity. Under ultraviolet excitation, the SiO 2 :Ln 3+ (Ln=Eu, Tb) spherical nanoparticles showed characteristic red and green emissions corresponding to f-f transition of Eu 3+ and Tb 3+ , respectively. Moreover, the luminescence emissions of samples can be tuned from green to yellow, orange and red by co-doping the Tb 3+ and Eu 3+ ions in different concentration ratio into the SiO 2 host due to the efficient dipole–dipole energy transfer mechanism from Tb 3+ to Eu 3+ under 377 nm excitation. These results show that as-prepared phosphors may find potential applications in color display fields.
研究领域:
材料科学
·
光学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
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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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Weimin Du,Zhaoqiang Zhu,Xiaofen Zhang,Dacheng Wang,Donghe Liu,Xuefeng Qian,Jimin Du
Zirconia modified by Samarium/Europium, RE/ZrO 2 (RE = Sm , Eu ), composite oxide nano-materials have been successfully synthesized by improved sol–gel method. Characterization results show that X-ray diffraction (XRD) peaks of products gradually shift to the lower angle with the increase of rare earth which implies that the lattice distances of RE/ZrO 2 nano-materials are gradually enlarged. Moreover, the molar ratios between zirconium and rare earth are consistent with the chemical formula and both of them are uniformly distributed in samples. Optical properties indicate that defect structures and electron configurations of RE/ZrO 2 (RE = Sm , Eu ) with single phase determine their absorption properties on visible light. Photocatalytic experiments indicate Zr 0.8 Sm 0.2 O 2− δ nano-crystals have excellent visible-light-responsive photocatalytic activities on Methylene blue and Rhodamine B which results from the special defect structure, suitable electronic configuration, and larger specific surface area. It follows that Zr 0.8 Sm 0.2 O 2− δ nano-crystals are new visible-light-responsive photocatalysts which can be applied in dye wastewater treatment and environmental protection in the future.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2023
·Vol. 649
·期 20
·e202300091
·
IF 1.4
Zhongzhi Wang,Rui Shi,Pengcheng Hao,Xin Qiao,Senchuan Song
In this work, a Eu(TTA) 3 BIP complex with a novel structure was synthesized and characterized. The Eu(TTA) 3 BIP complex has a wide excitation band and can be excited by light in the ultraviolet and blue regions. The characteristic red light of Eu(III) is emitted when the complex is excited. The use of the 2-(Pyrimidin-2-yl)-1H-benzo[d]imidazole (BIP) ligand improved the UV resistance of the complex. Moreover, the blue light reducing film prepared by the Eu(TTA) 3 BIP complex can effectively weaken blue light irradiation. In addition, the Eu(TTA) 3 BIP complex exhibits fluorescence thermal quenching properties. This provides the possibility for temperature sensing.
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高影响因子
SURFACE ENGINEERING
·
2022
·
IF 2.451
Sang Xiong,Ruo-tian Wang
Europium nitrate, ammonium tungstate and hexadecyl trimethyl ammonium bromide were used, and Eu-doped WO3 (WO3:Eu3+) nanopowder was synthesized by the micro-emulsion method. Tetraethyl silicate was hydrolysed into SiO2 and WO3:Eu3+ nanopowder coated with SiO2 (SiO2/WO3:Eu3+) was obtained. The microstructure and morphology of the prepared nano-SiO2/WO3:Eu3+ powders were characterized by XRD, SEM, TEM and HRTEM. Results showed that the prepared nano-SiO2/WO3:Eu3+ powders composed of WO3 of monoclinic and SiO2 of amorphous, which was spherical and granular, and the grain size reaches 50 nm. The tribological behaviour of nano-SiO2/WO3:Eu3+ as extreme pressure and anti-wear additive in the water-based fluid was studied by a four-ball machine. The results demonstrate that nano-SiO2/WO3:Eu3+ exhibits superior load-bearing capacity, anti-wear and anti-friction performance in water-based fluid, especially when the optimal concentration of nano-SiO2/WO3:Eu3+ is 0.4 wt-%. WSD, COF and wear volume of the nano-SiO2/WO3:Eu3+ decreased by 62.43%, 30.20% and 67.34%, respectively, compared with that of the water-based fluid.
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高影响因子
JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Yumeng Jia,Zhongxiang Shi,Jing Wang,Xiang Li,Zhengkai Zhao
Rare-earth-doped luminescent materials have great application prospects in anti-counterfeit identification. First, LaOF:Er, Eu phosphors with multi-mode luminescence were prepared by a heat treatment precursor using a hydrothermal method . Experimental results show that the emission intensity in green and orange-red light regions can be adjusted by regulating the raw material concentration of Eu 3+ . Upon excitation at 380 and 395 nm, a series of samples was observed to be green and orange-red, respectively, which indicates multi-mode luminescence characteristics. Study on variation of the environment around Eu 3+ ions based on the unique “probe” characteristics of Eu 3+ . Moreover, the prepared powder was applied to develop latent fingerprints on different substrates, which resulted in clearly defined friction ridge details of fingerprints under 395 nm ultraviolet light. Finally, according to these luminescent features, we chose the appropriate phosphors to make a series of luminescent patterns. The typical examples demonstrate that the multi-mode luminescent characteristic of the patterns can be used in anti-counterfeiting.
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高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Zhizhou Liu,Tong Wang,Liang He,Xueyan Nan,Xuming Sun,Pengli Bai
Bacillus anthracis, an extremely dangerous bacterium which can cause pulmonary anthrax and be used as biochemical weapon agent, can be detected by the detection of its major biomarker 2, 6-pyridine dicarboxylic acid (DPA). Herein, we reported the solvothermal synthesis of a non-luminescent NH 2 -BDC-Eu-MOF using Eu 3+ and 2-aminoterephthalic acid (NH 2 -BDC). The emission of amino ligand and Eu 3+ ions are absent in ethanol while the addition of DPA could recover both emission at 460 and 624 nm respectively. Thus this MOF can act as a dual emission ‘‘turn-on’’ probe for DPA detection. The detection limits (LOD) of this DPA probe are about 0.8 μM in ethanol and 0.36 μM in water, which are much lower than an infectious dosage of bacillus anthracis spores (60 μM) for human being. In order to monitor DPA levels more conveniently, we developed a one-to-two decoder logic gate operation, which can determinate DPA via color discrimination.
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高影响因子
Optoelectronics Letters
·
2020
·Vol. 16
·期 4
·293-297
·
IF 0
Li Peng,Zhang Hong-yan,Li Zhi-jun,Zhang Jun
The influence of polyvinylpyrrolidone (PVP) and monoethanolamine (MEA) as surfactants on photoluminescence (PL) of Eu-doped ZnO (ZnO:Eu) has been studied. X-ray diffraction (XRD) results show that there are more Eu 3+ ions to replace Zn 2+ ions into ZnO lattice for ZnO:Eu in the presence of surfactant MEA. From the spectral analysis for ZnO:Eu with different surfactants by Gaussian deconvolution, it can be seen that the use of MEA as a surfactant affects the energy transfer from ZnO host to Eu 3+ ions and leads to three new emission peaks, including UV emission (389 nm), violet emission (411 nm) and green emission (506 nm).
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DOI
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jin Li,Xintong Li,Yulian Wang,Qianxu Zhou,Guoqing Shi
The method for immobilizing antibodies on nanoparticles significantly impacts the analytical performance of lateral flow immunoassay (LFIA). As both Fc-binding peptide (FcBP) and Staphylococcal Protein A (SPA) enable the oriented immobilization of antibodies in a similar manner, do LFIA methods based on these two modes exhibit differences in analytical performance? To address this question, AFB1 antibodies were immobilized on Europium nanoparticles (EuNPs) using non-oriented immobilization, oriented immobilization through SPA and Fc-binding peptide FYEILHGAC, generating the immunoprobes Ab@EuNP, Ab-SPA@EuNP, and Ab-FcBP@EuNP, respectively. The corresponding LFIA methods were developed and the performance of the three methods was compared. The results show that the Ab-FcBP@EuNP method immobilizes more “effective antibodies” compared to Ab-SPA@EuNP and Ab@EuNP. When an equivalent amount of “effective antibodies” is immobilized on EuNP, the IC50 value of the LFIA method based on Ab-FcBP@EuNP is significantly lower (2.58 and 3.61 times) than that of the LFIA methods based on Ab-SPA@EuNP and Ab@EuNP, respectively. The LFIA method utilizing Ab-FcBP@EuNP displays detection biases for AFB1 spiked in rice and maize matrices ranging from −8.53% to 3.90%, and biases in the detection results for certified reference materials (CRMs) of rice and maize containing AFB1 range from −11.06% to 6.33%. These results suggest that the LFIA method employing FcBP-based antibody immobilization exhibits superior sensitivity, accuracy, and interference resistance compared to the SPA-based method. The outcomes of this study validate that EuNPs functionalized with FcBP streamline antibody immobilization, minimize antibody usage, and improve the analytical performance of the LFIA, thus demonstrating favorable potential for practical implementation.
研究领域:
食品安全检测
·
免疫学
·
分析化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yujun Wang,Ruiqing Wang,Xiang Zheng Kong,Xubao Jiang,Xiaoli Zhu,Shusheng Li
Multicolor lanthanide-doped polymers have found versatile applications in data encryption, sensing, and smart display. However, multiple components, sophisticated design, and complex preparation procedures are often required. In contrast, their intrinsic and multicolor fluorescence emission is been effectively used. Herein, Eu-doped polyurethane (ETP@PU), integrating tunable multicolor emission, self-healing, and multi-responsiveness, is prepared through a facile route via step-growth polymerization of PU using commercial Eu-ligand (Eu(TTA) 3 Phen, ETP) as a fluorophore. FTIR and XPS analysis demonstrate the successful coordination of Eu 3+ with carbamate groups of PU, which not only enhances the mechanical properties of PU but also bestows unique luminescent properties. With increasing ETP content, the intrinsic fluorescence of PU declines, while that of Eu displays a discernible enhancement, resulting in the tunable multicolor emission. The highest quantum yield of Eu-related emission reaches 71.3% due to the robust coordination and efficient energy transfer between Eu 3+ and PU. Moreover, the ETP@PU exhibits excellent self-healing capacity and multi-responsiveness, and their potential applications are also investigated in the field of light-emitting diodes, data encryption, and self-healing process monitoring. This work provides a facile and efficient strategy to develop multicolor lanthanide-doped polymers promising for various applications.
研究领域:
材料科学
·
光学
·
应用化学
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DOI
高影响因子
ANALYST
·
2025
·
IF 3.3
Lingling Li,Doudou Lei,Pengyue Song,Qingbin Xu,Lihua Huang,Xiao Ma,Lidong Zhou,Ping Zhang,Weijun Kong
Sensitive detection of carbendazim (CBZ), a widely monitored bactericidal pesticide globally, is critical to reduce risks to human health. In this study, Eu ions were embedded into a rigid metal–organic framework (MOF), to prepare Eu-MOF as a fluorescence signal source, which was subsequently post-modified with polyethyleneimine (PEI) for efficient coupling with anti-CBZ monoclonal antibodies (mAbs). On this basis, a PEI@Eu-MOF-mAbs fluorescent probe-based lateral flow immunosensor (LFIS) was developed for CBZ analysis, enabling dual-mode detection: rapid visual qualitative observation by the naked eye and intelligent fluorescence quantitative analysis by using a smartphone. PEI modification not only effectively improved the zeta potential, fluorescence intensity, quantum yield, and biological coupling ability of the Eu-MOF to mAbs, but also significantly enhanced the stability and anti-interference performance of PEI@Eu-MOF. The introduction of PEI@Eu-MOF-mAbs probes characterized by strong fluorescence emission, long fluorescence lifetime, and low background interference, markedly improved the detection sensitivity of the LFIS platform for trace CBZ. Under optimal conditions, the detection limit for smartphone-assisted fluorescence analysis was as low as 1.3 pg mL−1 with a wide linear detection range of 0.25–125 ng mL−1 for CBZ. The recoveries in spiked Panax notoginseng samples were 93.40–106.0% with RSD <1.69%, indicating outstanding reliability of the newly developed LFIS platform for accurate detection of CBZ. In comparison with seven other common pesticides, CBZ produced significantly weakened and stable fluorescence, indicating good specificity and stability of the developed platform over 4 weeks. Compared with current analytical methods, the smartphone-assisted PEI@Eu-MOF-mAbs dual-modal LFIS platform exhibited advantages of simple construction, easy operation, rapid response, obvious visualization to the naked eye, and intelligent quantitative analysis, highlighting its broad application potential for rapid screening and accurate point-of-care detection of CBZ in a large number of foods and agricultural products.
研究领域:
分析化学
·
食品安全
·
生物传感
·
免疫学
·
环境监测
·
药物残留检测
·
纳米材料应用
·
即时检测技术
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DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 25
·17622-17630
·
IF 2.9
Yuwen Yuan,Yunpeng Wang,Pragati Awasthi,Wenkun Dong,Dong Chen,Xvsheng Qiao,Zhiyu Wang,Guodong Qian,Xianping Fan
The in vitro detection applications of europium complex-doped microspheres mainly rely on strong fluorescence intensity and a well-defined morphology. In this work, using methyl methacrylate-modified polystyrene microspheres has been proven an effective strategy to enhance the fluorescence and morphology of Eu-complexes. The experimental results showed that the modification resulted in the formation of a porous structure within the polystyrene microspheres, enhancing the doping uniformity and facilitating a more significant accumulation of fluorescent molecules. Furthermore, because of their encapsulation ability, microspheres efficiently confine the fluorescent molecules within them. In addition, the nano-scale porous structure endowed the microspheres with enhanced properties without compromising solvent swelling capability, thereby significantly boosting the fluorescence performance of porous PSMMA. In lateral flow immunoassays (LFIAs), PSMMA-Eu microspheres were effectively utilized to detect fentanyl with exceptional sensitivity by capitalizing on these benefits, capable of detecting concentrations as low as 0.10 ng mL−1. This technology has significant potential for rapid point-of-care screening and clinical applications.
研究领域:
分析化学
·
生物医学工程
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）