Materials Today Nano
·
2026
·
IF 7.6
Hao Chen,Liang Li,Xuefang Lu,Shunze Huang,Man Xia,Jianzhong Xu,Xiwei Lai,Zewenhui Zhang,Xin Qian,Tianyu Xu,Feng Huang,Richeng Lin
Ultrathin scintillators are key components of high-spatial-resolution X-ray detectors in medical imaging, high-precision nondestructive inspection, and high-energy physics. Currently, the spatial resolution of X-ray imaging detector generally is enabled by high-light-yield scintillators with minimal optical scattering. However, suppressing optical scattering losses typically require the scintillation layers thinner than a few tens of micrometers, which is difficult to obtain through conventional top-down mechanical thinning. Here, a bottom-up method that rapidly growing inch-sized, Eu 3+ /Tb 3+ doped lanthanide oxychloride (LaOCl) films via chemical vapor deposition (CVD) is proposed to obtain large-area ultrathin scintillators. The doping Eu 3+ /Tb 3+ ions act as luminescent activators and provide strong red and green scintillation through efficient f-f intra-configurational transitions, which are shielded from the host lattice by the outer 5s 2 5p 6 electron shells, resulting in sharp emission lines and high quantum efficiency. The layered crystal structure of LaOCl further facilitates anisotropic growth, enabling precise control of film thickness from a few atomic layers up to the micrometer scale. The growing LaOCl:Eu 3+ film with thickness of approximately 30 μm shows a photoluminescence quantum yield (PLQY) of 99.3%, and demonstrating an ultralow X-ray dose-rate detection limit of 143.41 nGy s −1 , owing to efficient energy transfer from the LaOCl host to the activator ions. Furthermore, the growing LaOCl:Eu 3+ /Tb 3+ films exhibit excellent linear response and radiation hardness under X-ray exposure, retaining above 95% of their initial intensity after prolonged cyclic irradiation at 27.8 μGy s −1 for 24,000 s. These results demonstrate CVD-grown LaOCl:Ln films as a promising platform for high-resolution and low-dose X-ray imaging detection. An ultrathin scintillator film is fabricated via an unconventional bottom-up chemical vapor deposition–driven evaporation growth method. The oriented attachment and layer-by-layer stacking of LaOCl:Ln 3+ crystal nuclei enables the fabrication of centimeter-scale ultrathin films with controllable thickness. The doping Eu 3+ and Tb 3+ act as luminescent activators, generating intense red and green emissions through efficient 4f-4f intra-configurational transitions. Owing to the effective shielding of the outer 5s 2 5p 6 electron shells, these transitions exhibit sharp emission lines and exceptionally high quantum efficiency. For LaOCl:Eu 3+ films with a thickness of approximately 30 μm, the photoluminescence quantum yields achieves a near unit of 99.3%, demonstrating an ultralow X-ray detection limits of 143.41 nGy s −1 and outstanding radiation stability. Download: Download high-res image (333KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yuhong Zhang,Jingyi Zhang,Jingliang Zhang,Chenhao Han,Hang Liu
In this paper, a series of Zn 3 Mo 2 O 9 :Yb 3+ /Eu 3+ /Tb 3+ phosphor are prepared by solid-state reaction. The up-conversion(UC)/down-shifting(DS) luminescence properties are investigated in detail. The intensities of all emission bands present luminescence thermal enhancement under 980 nm excitation. From 293 to 493 K, the red emission intensity of Zn 3 Mo 2 O 9 :Yb 3+ /Eu 3+ sample increase by 2.36 times, and the green emission band intensity of Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ sample increase by 4.85 times. The temperature-dependent cooperative energy transfer(CET) process of Yb 3+ ions has an important contribution to thermal enhancement due to the negative thermal expansion(NTE) of Zn 3 Mo 2 O 9 matrix. In addition, the optical temperature sensing properties of the Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ /Eu 3+ phosphor are discussed according to the luminescence intensity ratio(LIR) technique. Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ /Eu 3+ phosphor can obtain bright deep red, yellow and orange light under the excitation of 395, 487 and 980 nm, which is used for multi-mode fluorescence anti-counterfeiting.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Nanyang Wang,Ziyunfei Gao,Bing Xiao,Tingqu Li,Yongqi Yang,Dawei Wei,Jie Chen,Mingyang Qu
A series of Ca 2 Gd 1-x-y Zr 2 Al 3 O 12 :xBi 3+ ,yTb 3+ phosphors have been successfully synthesized. • The anti-thermal quenching behavior of Tb 3+ ions was attributed to the synergistic effect of electron-phonon coupling and crystal field. • A dual-pathway FIR thermometer has been developed that achieves high sensitivity over a broad temperature range. • Optical materials were fabricated for optical fiber temperature detection platform and anti-counterfeiting label. Developing fluorescence intensity ratio (FIR) thermometers with low cost, high sensitivity and wide measurement range is a key bottleneck in this field, which poses severe challenges to conventional thermosensitive materials. Herein, a series of Ca 2 GdZr 2 Al 3 O 12 :Bi 3+ ,Tb 3+ phosphors with multi-excitation pathways were fabricated, and anti-thermal quenching (ATQ) behavior was attributed to the synergistic effect of electron-phonon coupling and crystal field, boosting the sensitivity and temperature detection range of fluorescent thermometers. Among them, under the excitation pathway where both Bi 3+ and Tb 3+ ions exhibit typical TQ behaviors, the FIR 309 thermometer achieves a maximum S r 309 value of 1.46% K −1 (at 353 K), thereby exhibiting excellent temperature sensing performance in the range of 293–433 K. In contrast, for the excitation pathway where the ATQ behavior of Tb 3+ ions is realized via the synergistic effect of electron-phonon coupling and crystal field, the S r 322 value of the FIR 322 optical thermometer increases to 2.05% K −1 , and shifts the high-sensitivity detection range to 413–573 K. Notably, the combined temperature detection range (293–573 K) of the FIR 309 and FIR 322 thermometers is two times that of the single FIR 309 thermometer. Moreover, the multi-pathway FIR optical thermometer exhibits outstanding temperature measurement performance on the optical fiber temperature detection platform. These promising findings offers a new perspective for developing optical thermometer with exceptional performance. Download: Download high-res image (85KB) Download: Download full-size image
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高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Yuheng Zhang,Xin Wang,Nan Chen,Xuezhong Gong,Yao Wang,Olga Grigoryeva,Jun Li,Ihor Rusetskyi,Mykhailo Danilov,Alexander Fainleib,Petro Stryzhak,Jianguo Tang
Cyanate ester resin (CER) is an excellent thermosetting polymer. However, its brittleness and poor mechanical properties limit its application. The innovation of this work lies in the smart collaborative toughening effects of Eu 3+ /Tb 3+ @uCNTs working together with phenolphthalein polyether sulfone (marked as PES-C) on dicyanate ester of bisphenol F. Tb 3+ -complex enhances Eu 3+ @uCNT-effects, and the cooperation of PES-C together with Eu 3+ -Tb 3+ @uCNTs (marked as ET-uC) functions strongly to increase flexural, tensile, and impact strengths by 209%, 120%, and 286%, respectively. When additions of ET-uC ratio at 0.6 wt% and PES-C ratio at 15% to CER. At the same time, we can get more multiple enhancing effects can be observed as below. The introduction of ET-uC reduces the curing temperature of the composite material from 342°C to 271°C. At the same time, the mass loss rate decreased from 87% to 55%. The intensity of luminescent CER/ET-uC/PES-C is much stronger compared to CER/ET-C/PES-C. If the curing temperature is 250°C, the luminescence lifetimes of CER/ET-C/PES-C and CER/ET-uC/PES-C become 411.23 and 731.91 μs, respectively. These strong data confirm that our strategy of ET-uC collaborating with the linear thermal stable polymer of PES-C functions has generated the breakthrough to improve the comprehensive properties of CER. Graphical Schematic diagram of preparation of CER/ET-uC/PES-C composite material.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
G.Q. Wang,Y.P. Lin,R. Ye,Y.N. Feng,L.Y. Li
In this work, Pr 3+ and Tb 3+ coactivated Na 5 Gd(WO 4 ) 4 (NGW) phosphors have been synthesized by high-temperature solid-state reactions and the scheelite crystal structure was determined for the first time. A color-tunable emission in NGW: Pr 3+ , Tb 3+ phosphors can be realized by the modulation of excitation wavelengths, namely, the fluorescence intensity ratio of Pr 3+ to Tb 3+ in this material could be changed by different excitation. With increasing temperature, the luminescence of NGW: Pr 3+ , Tb 3+ phosphor decreases almost linearly with the CIE coordinate variation from (0.306, 0.392) to ((0.375, 0.465) and result in the color of the photoluminescence variation from the blue-green to yellow. These results demonstrated that the investigated phosphors are attractive for application in display lighting and optical temperature sensing.
研究领域:
材料科学
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发光材料
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光学性质
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固态化学
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温度传感
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高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Baochen Wang,Shifeng Sun,Zeqi Li,Zongwang Li,Weiwei Lin,Chao Zeng,Yan-gai Liu,Ruiyu Mi
Rare earth co-doped phosphor for fluorescence intensity ratio (FIR) thermometer has gained increasing attention in recent years. Herein, the novel Tb 3+ and Eu 3+ co-doped K 3 SrBi(P 2 O 7 ) 2 (KSBP) phosphate phosphors were reported. The crystal structure of the title phosphor was determined using Rietveld refinement and proved to have a three-dimensional structure. The time-resolved spectroscopy reveals that there is almost no energy transfer between Tb 3+ and Eu 3+ . More importantly, Tb 3+ and Eu 3+ emissions show different thermal quenching behaviors, which claims the potential of this material for application in optical thermometer. The FIR of the typical KSBP:0.02Tb3+,0.04Eu3+ sample demonstrates a polynomial relationship as a function of temperature and the absolute and relative sensitivity are 0.025 K –1 and 0.59%/K, respectively. In general, our study reports a novel and potential KSBP:Tb 3+ ,Eu 3+ phosphate phosphor that is promising for use in high-sensitive FIR thermometers.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Jiachen Chen,Jin Li,Beining Li,Zhuocheng Chen,Xue Bai,Long Zhang,Jin He
The development of advanced luminescent materials is highly desirable for developing the energy-efficient lighting technology. However, it is still challenging to achieve stable full-color tuning in the same matrix upon a single-beam light excitation so as to ensure the high color stability and consistency. Herein, Eu 3+ /Eu 2+ /Tb 3+ co-doped sintered nanoporous glass via the dipping strategy is fabricated, which can emit blue, green and red emissions simultaneously by simply modifying the thermal treatment temperature. This full-color tuning is attributed to the dual roles of the thermal reduction of Eu 3+ to Eu 2+ in Al 2 O 3 -SiO 2 glass and simultaneous emissions of Eu 3+ /Eu 2+ /Tb 3+ activators. The densification of nanoporous glass via sintering could effectively decrease the amount of hydroxyl groups that present in the glass matrix, resulting in 5 times enhancement of the photoluminescence intensity and longer photoluminescence lifetime of rare earth (RE) ions. The thermal reduction of Eu 3+ to Eu 2+ is due to the reduction environment provided by Al 3+ ions in the Al 2 O 3 -SiO 2 glass. The energy transfer (ET) from Eu 2+ to Tb 3+ , Eu 2+ to Eu 3+ and Tb 3+ to Eu 3+ have been investigated in detail. Based on the ET mechanism, rational PL spectra design was demonstrated by varying the concentration of Eu 3+ ions in solution. The Color Correlated Temperature (CCT) and the Color Rendered Index (CRI) values of the white light emission glass are 7420 K (Cold-white emission) and 80.85, the temperature dependent photoluminescence (TDPL) analysis reflects the white light emission glass possesses high thermal stability and excellent thermal restorability. This facile fabrication and full-color tuning of Eu 3+ /Eu 2+ /Tb 3+ co-doped sintered nanoporous Al 2 O 3 -SiO 2 glass may provide a novel luminescent material for white-light emitting diodes (WLEDs) application.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 40
·19153-19160
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IF 3.925
Zhenyu Lu,Gongke Li,Yufei Hu
A Tb3+ functionalized triazine-porous organic framework (Tb3+/TAPOF) was prepared by introducing Tb3+ into a triazine-porous organic framework through a coordination bond. Combining the advantages of both Tb3+ and TAPOF, Tb3+/TAPOF showed good thermal stability, a high specific surface area, and excellent fluorescence performance. As the concentration of ciprofloxacin became higher, the intensity of the peak at 544 nm increased, while that of the peak at 440 nm did not change. Thus, a ratiometric fluorescent sensor based on Tb3+/TAPOF for selective ciprofloxacin determination was constructed, and the mechanism of ciprofloxacin determination was studied using the UV-vis and phosphorescence spectra and fluorescence lifetime. A good linear relationship, under the optimized conditions, was obtained between the I544/I440 value and the ciprofloxacin concentration in the range of 0.06 μmol L−1 to 5.0 μmol L−1, and the limit of detection (LOD, S/N = 3) was 19 nmol L−1. Moreover, the ratiometric fluorescent sensor based on Tb3+/TAPOF was applied to the determination of ciprofloxacin in aquatic products with recoveries in the range of 96.1–108.6%. These results obtained by the ratiometric fluorescence method and the high-performance liquid chromatography (HPLC) method are consistent for determination of aquatic products, which further proves that this method based on Tb3+/TAPOF is accurate. Generally, these results demonstrate that the Tb3+/TAPOF based ratiometric fluorescent sensor has an extensive application prospect in ciprofloxacin determination in the aquatic product industry.
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JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Yaling Zhang,Lingcong Fan,Xuefeng Wang,Jiansheng Xie,Ying Shi
Rare earth doped 12CaO·7Al 2 O 3 (C12A7) glass-ceramics are one of attractive photonic materials due to their high transparency, high luminescent efficiency and eco-friendly nature. A series of C12A7 glasses with different Tb 3+ doping concentrations was prepared by aerodynamic levitation method. The C12A7:Tb glass-ceramics were obtained via in-situ growth from the glasses with the identical chemical composition at 800 °C. The microstructure observation demonstrates that the elemental distributions of Ca and Al are homogeneous in the glass-ceramics and the grain size of C12A7 is 4–70 nm. The in-line transmittance of glass-ceramics reaches as high as 82% at 1500 nm. The emission spectra of the C12A7:Tb glass-ceramics present characteristic Tb 3+ emission peaks at 486 nm ( 5 D 4 → 7 F 6 ), 541 nm ( 5 D 4 → 7 F 5 ), 585 nm ( 5 D 4 → 7 F 4 ) and 621 nm ( 5 D 4 → 7 F 3 ). The photoluminescence lifetime of C12A7:0.3%Tb glass-ceramic is 1.9 ms. Compared with the emission intensity of the glasses, that of the glass-ceramics increases due to the reducing in concentration of oxygen vacancy associated with network forming (NWF) cations. The highly transparent C12A7:Tb glass-ceramics may be a promising candidate for green light source in solid state lighting.
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Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 34
·6443-6452
·
IF 7.571
Dan Xiu,Sibo Zhao,Zhenhua Li,Yanan Xu,Yao Wang,Zhijun Zhu,Min Zhang,Christopher D. Snow,Laurence A. Belfiore,Jianguo Tang
In this work, a designed porous DNA crystal with high intrinsic biocompatibility was used as the scaffold material to load fluorescent guest molecules to detect anti-cancer drugs. It is shown here that the synthesized crystals have the characteristics consistent with the designed large solvent channels, and can therefore accommodate guest molecules such as fluorescent proteins that cannot be accommodated by less porous crystals. Eu(TTA)3phen and Tb(acac)3phen lanthanide complexes were individually noncovalently loaded into the porous crystals, resulting in hybrid luminescent DNA crystals. Emodin, an anti-cancer, anti-tumor, anti-inflammatory drug, was found to quench lanthanide complexes in solution or in crystals. Notably, emodin is the active ingredient of Lianhua Qingwen Capsule, an anti-COVID-19 drug candidate. Therefore, the porous DNA crystals reported here have potential applications as a biocompatible and theranostic delivery biomaterial for functional macromolecules.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Yuexin Wang,Yanhua Song,Xiuqing Zhou,Keyan Zheng,Ye Sheng,Pingchuan Ma,Bowen Zhang,Meiqi Chang,Haifeng Zou
Uniform Lu 2 (C 4 H 4 O 6 ) 3 ·6H 2 O cauliflower-like microspheres have been synthesized via a direct precipitation method at room temperature, without any templates and catalysts. The solvent-dependent morphological evolution and the formation mechanism of the Lu 2 (C 4 H 4 O 6 ) 3 ·6H 2 O cauliflower-like microspheres were investigated in detail. Furthermore, Eu 3+ /Tb 3+ -doped Lu 2 O 3 inherited their parents' morphology were obtained through a direct annealing process. The Lu 2 (C 4 H 4 O 6 ) 3 ·6H 2 O:Eu 3+ , Lu 2 O 3 :Eu 3+ exhibit strong red emission corresponding to the 5 D 0 - 7 F j transition of the Eu 3+ ions. The Lu 2 (C 4 H 4 O 6 ) 3 ·6H 2 O:Tb 3+ , Lu 2 O 3 :Tb 3+ exhibit strong green emission corresponding to the 5 D 4 - 7 F j transition of the Tb 3+ ions under UV light excitation. The samples may have potential applications in the fields, such as light-emitting phosphors, advanced flat panel displays, or biological labeling.
研究领域:
材料科学
·
光学
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Optical Materials Express
·
2021
·Vol. 11
·期 9
·2828-2838
·
IF 3.442
Taisen Li,Jin Liu,Xinzhi Wang,Abdur Raheem Aleem,Yao Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Multimodal nanoprobes are of great significance in clinical diagnosis, because they integrate the advantages of multiple imaging methods. The combination of multiple imaging modes provides more comprehensive and complex information than single-mode imaging, which can greatly improve clinical diagnoses. In this paper, Gd3+ and Tb3+ co-induced polyelectrolyte nanoaggregates (GTIPAs) are introduced as a novel dual-mode imaging probe. Containing gadolinium and terbium, GTIPAs are regular spherical nanoparticles, whose diameters are about 150 nm. As a fluorescent nanomaterial, GTIPAs have strong and stable luminescence intensity. At the same time, as an MRI contrast agent, GTIPAs exhibit a good contrast effect and a high longitudinal relaxation rate. In addition, the polyelectrolytes reduce the cytotoxicity of the complexes, confering excellent biocompatibility and water solubility. Therefore, GTIPAs are non-toxic luminescence/magnetic resonance dual-mode imaging probes.
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