Small Methods
·
2025
·Vol. 9
·期 5
·2401615
·
IF 9.1
Leipeng Li,Huimin Li,Yifan Liu,Chongyang Cai,Pei Li,Dengfeng Peng,Yanmin Yang
Advanced functional materials that possess both persistent luminescence (PersL) and mechanoluminescence (ML) have gained considerable attention during the past few years owing to their potential applications in many fields such as two-dimensional stress sensing, energy-saving lighting, and optical bioimaging. However, combined investigation of PersL and ML is still in its infancy. Here, the optical property of Er 3+ -doped NaYF 4 , mainly focusing on the PersL and ML characteristic and their correlation, is studied in detail. It is shown that microscaled NaYF 4 :Er 3+ has advantages against nanoscaled counterpart in terms of PersL and ML, consistent with the photoluminescence results. By means of pre-charging and trap-emptying cycle and thermoluminescence test, it is confirmed that the PersL and ML of NaYF 4 :Er 3+ come from the same trapped charge carriers, and the ML belongs to the trap-controlled ML. Furthermore, the good repeatability is proven, and regulation of the PersL and ML of NaYF 4 :Er 3+ is realized. Finally, the potential of NaYF 4 :Er 3+ for dynamic anti-counterfeiting and dual-mode detection of X-ray radiation dose is demonstrated. Graphical After being charged by X-rays, NaYF 4 :Er 3+ emits green persistent luminescence and trap-controlled mechanoluminescence, which can be used for dynamic anti-counterfeiting and X-ray dosimetry.
研究领域:
材料科学
·
光学
·
固体物理
·
辐射探测
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-7
·
IF 2.8
Yuan Lifang,Wang Junzhong,Huang Zhijin,Shen Kaixiang
Long afterglow phosphors have garnered significant attention for their ability to emit light long after excitation ceases. Afterglow emission relies on metastable trap levels within the bandgap of the host materials. Effective trap engineering strategies to optimize traps are critical in determining the afterglow performance. In this study, we investigate the codoping of Bi 3+ and Er 3+ into LiTaO 3 to enhance afterglow performance. Through high-temperature solid-state synthesis, a series of LiTaO 3 :x%Bi 3+ , y%Er 3+ (x = 0 or 0.5%, y = 0.1–4.0%) samples were prepared successfully. Structural characterization confirmed the successful incorporation of Bi 3+ and Er 3+ into the Li⁺ sites without disrupting the host lattice. Photoluminescence studies revealed that Bi³⁺ codoping significantly enhances the green emission of Er³⁺, with optimal performance achieved at 1.0% Er 3+ doping. Thermoluminescence (TL) analysis demonstrated the presence of traps with the depth of 0.748 eV, enabling prolonged afterglow emission at room temperature. The afterglow mechanism involves charge carrier storage in traps under UV excitation, followed by thermal release and recombination at luminescent centers, facilitated by energy transfer from Bi 3+ to Er 3+ . This work provides a strategy for designing a long afterglow phosphor through controlled codoping, offering insights into trap engineering and energy transfer processes in perovskite-based luminescent materials.
研究领域:
材料科学
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光学材料
·
固体物理
·
发光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xianchang Ning,Yuting Wu,Yusheng Xu,Zhenbeina Deng,Tianyu Guo,Minghui Su,Dacheng Zhou,Qi Wang,Jianbei Qiu
Multimodal temperature sensing minimizes environmental interference through cross-validation by integrating both upconversion (UC) and downconversion (DC) modalities and exploiting differences in the thermal responses of emissive transitions in a single activator center. Er 3+ -doped Gd 2 (WO 4 ) 3 phosphors were synthesized via a high-temperature solid-state reaction. This material nables multimodal self-calibrating temperature sensing based on both DC and UC luminescence and exhibits excellent resistance to thermal quenching. Notably, under 360 nm excitation (DC mode), the 530 nm emission maintained 96% of its intensity from 313 to 493 K, and under 980 nm excitation (UC mode) it remained within ±5% from 313 to 573 K. Additionally, the 824 nm emission (under 980 nm excitation) exhibited a 3.37-fold enhancement from 313 to 573 K, attributed to thermally activated cross-relaxation (CR). We also explored a multimodal self-calibrating temperature sensing system using fluorescence intensity ratio (FIR) techniques, employing the I 530 /I 551 ratio in the DC mode and the I 824 /I 551 ratio in the UC mode. Notably, the I 824 /I 551 ratio achieved a maximum relative sensitivity (S r ) of 2.21% K -1 at 313 K. A dual-mode temperature fusion platform was developed by integrating DC and UC channels. In this scheme, the multimodal FIR strategy synergistically minimizes systematic errors through cross-validation while enhancing reliability by combining thermal-quenching resistance and thermally activated emission. This work establishes a novel dual-mode material system framework for high-accuracy optical thermometry.
研究领域:
光学测温
·
功能材料
·
发光材料
·
生物医学传感
·
分子探针
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Yichen Ye,Yongbao Xiao,Yao Ji,Weichao Wang
Tellurite-based glass composed of TeO 2 -Ta 2 O 5 -ZnO (labeled as TTZ) is explored as the host material for a potential 2.7 μm fiber laser. It is found that the glass-forming region, structural and physical properties of TTZ glass undergo considerable changes when platinum crucible are adopted to prepare glass instead of alumina one. Especially, the Er 3+ -doped TTZ glass that melted in platinum crucible exhibits relatively larger absorption and emission cross-sections at 2.7 μm than that of alumina one. Further studies show that an enhanced 2.7 μm luminescence can be achieved from the heavily Er 3+ -doped TTZ glass, the absorption and emission cross-sections, figure of merit and maximum gain coefficient of Er 3+ -doped TTZ-Pt glasses at 2.7 μm are calculated to be 0.91 × 10 −20 and 1.01 × 10 −20 cm 2 , 3.18 × 10 −24 cm 2 ·s and 2.25 cm −1 , respectively, indicating that the Er 3+ -doped TTZ glass may be a promising candidate host for mid-infrared fiber lasers.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Radiation Research and Applied Sciences
·
2025
·
IF 2.5
Yixiang Liao,Chuyuan Mao,Jinfan Zhang,Guowei Wang,Guoqing Liu,Qiang Yan,Zhengxin Wu,Yong Liu
In this study, erbium (Er)-doped bismuth tungstate (Bi 2 WO 6 ) polycrystalline materials were synthesized using a hydrothermal method. The synthesized products were then systematically characterized through X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy analyses. Moreover, the shielding performance of Er-doped Bi 2 WO 6 against gamma rays was investigated by analyzing its linear attenuation coefficient (LAC), mass attenuation coefficient (MAC), half-value layer (HVL), and tenth-value layer (TVL). The results indicated that Er 3+ ions were successfully incorporated into the crystal lattice of Bi 2 WO 6 without altering its crystal structure. Moreover, as the Er 3+ doping ratio increased, the morphology of Bi 2 WO 6 evolved from a lamellar stacking structure to a more densely clustered flower-like spherical structure. The shielding performance of Bi 2 WO 6 against 59.5-keV gamma rays was significantly enhanced by Er 3+ doping. When the Er 3+ concentration was 12.5 mol%, the LAC, MAC, HVL, and TVL values were 35.66 cm −1 , 12.6 cm 2 /g, 0.019 cm, and 0.065 cm, respectively. For the attenuation of high-energy gamma rays (661.6, 1173, and 1332 keV), an increase in the Er 3+ content resulted in a slow increase in the LAC, small decreases in the HVL and TVL, and almost no change in the MAC.
研究领域:
材料科学
·
核工程
·
晶体学
·
辐射屏蔽
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8293-8302
·
IF 2.324
Qin Zhuozhuo,Liu Wenxia,Li Zhenzhen,Chen Huabin,Li Guodong,Yu Dehai
Doping lanthanide ions in metal oxides is an efficient way to develop visible and near-infrared (NIR) active photocatalysts. Herein, we present a method to develop NIR active photocatalyst via doping Er 3+ into ZnO/ZnAl 2 O 4 multi-phase oxides by isomorphous replacement of Al 3+ with Er 3+ during the preparation of Zn/Al-hydrotalcite-like compound, specifically, the calcination of the hydrotalcite-like compound at 900 °C. The as-prepared Er 3+ -doped catalyst and its precursor were characterized using X-ray diffraction technique, scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy and near-infrared-visible-ultraviolet diffused reflectance spectroscopy. It was found that the doping of Er 3+ causes lattice expansion for ZnO and ZnAl 2 O 4, and yields optical absorptions at visible and NIR light regions. The obtained Er 3+ -doped ZnO/ZnAl 2 O 4 multi-phase oxides produce superoxide and hydroxyl radicals in the photocatalytic process, and show enhanced ultraviolet (UV) photocatalytic activity on degradation of methyl orange, compared to undoped ZnO/ZnAl 2 O 4 multi-phase oxides. The Er 3+ -doped ZnO/ZnAl 2 O 4 multi-phase oxides also possess visible and NIR light photocatalytic activities, and its photocatalytic activity is rather stable under UV, visible and NIR light irradiation. This work provides a new way for doping of lanthanide ions in metal oxides and designing full-spectrum photocatalysts.
研究领域:
材料科学
·
光催化
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 37
·8634-8643
·
IF 5.344
Yongmei Li,Yuemei Li,Yandong Bai,Laixiang Lin,Yina Sun
Cerium oxide nanoparticles (NPs) due to their advanced catalytic performance have been widely used to treat oxidative damage. However, Ce2O3 NPs have not been further investigated in the treatment of acute oxidative injury in vivo. It is meaningful to improve the efficiency for treatment of acute oxidative injury with NPs in vivo. In this report, we designed Er3+-doped Ce2O3 (Er/Ce2O3) NPs with a size of 7.9 nm, which were used to treat acute liver injury. Er/Ce2O3 NPs realized high-efficiency catalysis of hydrogen peroxide (H2O2) at room temperature. An acute liver damage model was established through intraperitoneal injection of lipopolysaccharide (LPS) in C57 mice. By analyzing histopathological and biochemical indexes, Er/Ce2O3 NPs showed a significant improvement in LPS-induced acute liver injury. Acute liver oxidative damage can be treated within 24 hours, which proved the high catalytic efficiency of Er/Ce2O3 NPs in vivo. The activities of SOD, GPx and CTA increased and production of ROS decreased with Er/Ce2O3 NP treatment in comparison with LPS-induced injury, indicating that the mechanism of Er/Ce2O3 NPs in the treatment of acute oxidative damage of liver was mainly via catalysis of ROS products. Moreover, the protein expression levels of TNF-α, CD45 and IL-1β in liver decreased in the Er/Ce2O3 NPs-treated group, which indicated that Er/Ce2O3 NPs have the function of anti-inflammation property. Therefore, Er/Ce2O3 NPs can be applied to treat and prevent diseases caused by acute oxidative damage.
研究领域:
纳米技术
·
生物医学工程
·
药理学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yuxuan Qiu,Songbin Liu,Junjie Wang,Yushuang Peng,Yutian Yu,Hongyuan Fei,Fengli Yang,Jiaqing Peng,Junjun Tan,Xinyu Ye
Optically active lanthanide-doped upconversion nanoparticles (UCNPs) typical enhance their luminescence intensity by epitaxially growing an inert shell. However, related studies focusing on the regulation of their multiple upconversion emission selectivity remain limited. Herein, a novel regulation method is proposed to realize the selective regulation of Er3+ multicolor upconversion characteristic in Er3+ highly doped active core-inert shell UCNPs. This method involves intentionally reducing the amount of CF3COOLi precursor during the shell growth process, which decreases the orderliness and lattice density of local structure of the shell matrix and promotes the formation of F⁻ vacancy defects. These vacancy defects can provide additional non-radiative relaxation channels, facilitating the non-radiative energy transfer from high-energy excited state levels to the ground state, which leads to unique emission characteristics in the core-shell nanocrystals. Notably, the local structure-dependent multicolor modulation strategy is independent on the composition and thickness of the inert shell, further demonstrating the universality of the proposed regulation method. By using stoichiometric ratio deviations in the matrix materials to regulate the microscopic local structure, this approach provides a new strategy for the multicolor modulation of UCNPs, which can provide the plentiful nanomaterial system choices for frontier applications such as anti-counterfeiting security, biosensors and biomedicine.
研究领域:
纳米材料
·
光学材料
·
发光材料
·
稀土化学
·
固体物理
·
材料科学
✓ 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）