JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2022
·Vol. 37
·期 3
·393-398
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IF 1.271
Hou Huayu,Gan Lin,Wang Youfa,Wang Wei
Nd 3+ -doped NaGdF 4 : Yb, Tm nanocrystals were synthesized by an improved high-temperature thermal decomposition method, and the effects of doping concentrations on the crystal structure, phase composition, and upconverted fluorescence intensity were also investigated. The results reveal that the introduction of Nd 3+ ions does not cause the transformation of the crystal phase, but induce the change of the unit cell parameters. Meanwhile, the fluorescence intensity of the synthesized nanocrystals when co-doped with 3 mol% Nd 3+ is the strongest under the excitation of 980 nm laser, which is 3.9 times that of the Nd 3+ -free doped nanoparticles, and the average size is 62.9 nm. And it is located in the blue area of the CIE coordinate diagram, and the corresponding color purity is 91.81% under the same experimental conditions. The resulting nanocrystals show the potential as excellent fluorescence labeling and in vivo imaging probes.
研究领域:
材料科学
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纳米技术
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光学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 21
·6301-6307
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IF 6.641
Puxian Xiong,Mingying Peng
Mechanoluminescence (ML) from most state-of-the-art phosphors primarily appears within the spectral range of ultraviolet to visible and does not lie in the biological transparency windows, therefore limiting its application in biological fields. In this study, we report a novel Nd3+ doped LiNbO3 phosphor, which demonstrates intense and elastic near infrared (NIR) ML under compressive forces. The ML intensity increases with force from 500 to 2500 N, and it remains stable under larger forces due to the failure of the resin. Both the starting and stopping of force loading are found to trigger ML, but the intensity is weakened over time. Meanwhile, this ML emission, peaking at 895 nm, is located within the first biological transparency window range (650–950 nm), and it has been proved to penetrate tissue thicker than 20 mm. This, therefore, extends ML into the NIR range and makes it possible to detect biomechanical behavior in situ inside living bodies.
研究领域:
材料科学
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光学
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生物医学工程
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Lu Liu,Dongyang Tang,Li Xu,Fahim Khan,Isam Ud Din,Zhao Wang,Pengfei Li,Hanyang Li,Enming Zhao,Yang Zhang
Various concentrations of Ho 3+ and Nd 3+ codoped NaYF 4 nanorods were successfully synthesized. On the basis of the upconversion spectra under 808 nm excitation, the luminescence mechanisms were discussed in detail. The ratio of red to green intensity evidently increases with increasing the Nd 3+ content due to the stronger interactions between Ho 3+ and Nd 3+ , which enhance the red emission and suppress the green one. In addition, we found that the red emission is more sensitive to the ambient temperature as compared to the green one, thus validating the thermal sensing by applying the ratiometric method by using these two emission bands. Relatively high sensing sensitivity of 0.9% was obtained, evidencing the great potential of the presented optical thermometer.
研究领域:
材料科学
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光学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenlu Pan,Qun Zeng,Kai Li,Wei Lü
Tuning the luminescence properties of efficient near-infrared (NIR) phosphors is critical to expanding their applications in NIR spectroscopy. In this paper, a series of novel Cr 3+ -doped LaZnAl 11 O 19 (LZAO: Cr 3+ ) phosphors are synthesized via a high-temperature solid-phase method. These phosphors exhibit NIR emission in the range of 650–900 nm, with the LZAO: 0.10Cr 3+ achieves an excellent internal quantum efficiency (IQE) of 89.9 %. Notably, it demonstrates excellent thermal stability, maintaining 97.2 % of the initial photoluminescence intensity at 513 K. Through co-doping with Nd 3+ , the NIR emission broadens across the 650–1100 nm range, and leads to a substantial enhancement in Nd 3+ emission intensity due to efficient Cr 3+ →Nd 3+ energy transfer. Remarkably, the optimum LZAO: Cr 3+ , Nd 3+ phosphor exhibits a high IQE (82 %) and an outstanding anti-thermal quenching behavior (118.0 % @ 513 K), with the underlying mechanism of its thermal stability further elucidated through defect level model. In addition, the synthesized phosphors show great promise for multifunctional applications in NIR phosphor-converted light emitting diodes, plant growth lighting, non-destructive testing, luminescence thermometry and solar cells.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xin Xie,Wanyin Ge,Ye Tian,Qian Zhang,Maohao Yang,Chenge Wu,Peng He,Honglei Yin
To develop continuous broadband emission near-infrared (NIR) phosphors compatible with blue LED chips, numerous Cr 3+ -Yb 3+ co-doped phosphors have been synthesized. However, the emission spectra of Cr 3+ vary significantly across different matrix materials, while Yb 3+ maintains a relatively stable emission spectrum. This variation leads to notable luminescence depressions between 850 and 900 nm in many Cr 3+ -Yb 3+ co-doped phosphors. To address this emission spectrum gap, we utilized Cr 3+ as a sensitizer and introduced Nd 3+ as the luminescence center within the La 3 Sc 2 Ga 3 O 12 matrix material, establishing a Cr 3+ -Nd 3+ energy transfer channel. Under 480 nm excitation, we tuned emission peaks at 800 nm (Cr 3+ ) and 881 nm (Nd 3+ ). The stable NIR emission of Nd 3+ effectively compensates for the missing spectrum in Cr 3+ -Yb 3+ co-doping. The Cr 3+ -Nd 3+ energy transfer process was thoroughly analyzed using diffuse reflection spectrum, excitation spectrum, and fluorescence decay curves. The LSGO:0.125Cr 3+ , 0.03Nd 3+ compound with the best optical performance was packaged with a 480 nm LED chip to create a NIR light source. At a working current of 10 mA, it achieved a photoelectric conversion efficiency of 9.45 %, demonstrating its potential for applications in non-destructive detection and luminescence thermometry. This work presents a novel strategy for tuning NIR spectral distribution and developing continuous broadband NIR phosphors.
研究领域:
材料科学
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光学
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光子学
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光谱学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
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2020
·
IF 2.779
Yue Liang,Linghui Shen,Tong Wei,Chuanzhen Zhao,Bing Jia,Yong Shi,Shengcheng Wu
Up-conversion nanoparticles (UCNPs) stimulated by near-infrared (NIR) light have received immense interest for their potential applications in many fields. In this work, Nd 3+ - and Yb 3+ -sensitized Bi 4 Ti 3 O 12 (BiT x :Nd 3+ /Yb 3+ , 0.005 ≤ x ≤ 0.3) UCNPs with thermometric and photo-thermal (PT) functions were successfully synthesized by a convenient co-precipitation approach, and the phase and morphologies were characterized. Under 980 nm excitation, BiT x :Nd 3+ /Yb 3+ UCNPs exhibited remarkable multiple emissions in the region from 450 to 900 nm. The visible and NIR emissions were tightly dependent on the Nd 3+ concentration and the strongest NIR emissions were obtained in sample BiT0.3:Nd 3+ /Yb 3+ . The possible UC mechanisms and processes were proposed. Furthermore, the capability of the UCNPs as thermometers was probed based on the thermo-responsive fluorescence intensity ratio technique in the temperature range 303–573 K. The maximum sensitivity (S max ) of BiT0.3:Nd 3+ /Yb 3+ was determined to be as high as 0.032 K -1 . Meanwhile, PT effect was evaluated by monitoring the variation of surface temperature of the sample as functions of irradiation time and power density. Conspicuous PT effect was confirmed and the maximum temperature induced by laser was about 91 °C. These results reveal that BiT0.3:Nd 3+ /Yb 3+ UCNPs has promising potential applications as optical thermometer and heater.
研究领域:
材料科学
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光学
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 37
·7449-7456
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IF 4.726
Xiang Li,Qiuhong Zhang,Zeeshan Ahmad,Jie Huang,Zhaohui Ren,Wenjian Weng,Gaorong Han,Chuanbin Mao
750–850 nm (NIR I) and 1000–1400 nm (NIR II) in the near infrared (NIR) spectra are two windows of optical transparency for biological tissues with the latter capable of penetrating tissue deeper. Monitoring drug release from the drug carrier is still a daunting challenge in the field of nanomedicine. To overcome such a challenge, we propose to use porous Nd3+-doped CaTiO3 nanofibers, which can be excited by NIR I to emit NIR II light, to carry drugs to test the concept of monitoring drug release from the nanofibers by detecting the NIR II emission intensity. Towards this end, we first used electrospinning to prepare porous Nd3+-doped CaTiO3 nanofibers by adding micelle-forming surfactant Pluronic F127, followed by annealing to remove the organic component. After a model drug, ibuprofen, was loaded into the porous nanofibers, the drug release from the nanofibers into the phosphate buffered saline (PBS) solution was monitored by detecting the NIR II emission from the nanofibers. We found that the release of the drug molecules from the nanofibers into the PBS solution triggers the quenching of NIR II emission by the hydroxyl groups in the surrounding media. Consequently, more drug release corresponded to more reduction in the intensity of the NIR II emission, allowing us to monitor the drug release by simply detecting the intensity of NIR II from the nanofibers. In addition, we demonstrated that tuning the amount of micelle-forming surfactant Pluronic F127 enabled us to tune the porosity of the nanofibers and thus the drug release kinetics. This study suggests that Nd3+ doped CaTiO3 nanostructures can serve as a promising drug delivery platform with the potential to monitor drug release kinetics by detecting the tissue-penetrating NIR emission.
研究领域:
纳米医学
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生物材料
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光学成像
✓ 已验证
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 27
·3603-3608
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IF 2.6
Wenfei Xun,Zhipeng Meng,Chuwei Xie,Suli Wu
808 nm excited Nd3+ doped upconversion nanoparticles (UCNPs) have become a new research hotspot due to their reduced thermal effect when applied in a water-rich system. Different from Tm3+-mediated energy migration upconversion of Tb3+, in this work, NaYF4:Yb/Tb@NaYF4:Yb@NaNdF4:Yb@NaYF4 core–shell–shell–shell nanoparticles were designed based on the Yb3+ sensitized cooperative energy-transfer process to realize photon upconversion. NaYF4:Yb served as the migration layer, separating the activator Tb3+ from the sensitizer Nd3+ and minimizing the deleterious cross-relaxation between them. At 40% Yb3+ doping concentration in the NaYF4:Yb layer, bright green luminescence was achieved under 808 nm excitation. Meanwhile, the presence of Yb3+ in the sensitization layer (NaNdF4:Yb) reduced Nd3+ cross-relaxation, leading to improved energy migration efficiency of Nd3+ → Yb3+. Finally, the incorporation of an inert NaYF4 shell resulted in a significant luminescence boost. These nanoparticles can be dispersed in water after surface modification and could be effectively excited after laser penetration of 3 cm of water, indicating the enormous potential of the designed UCNPs in the biological system.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·1287-1298
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IF 4.186
Xiaofeng Zhao,Yuancheng Teng,Yuxiang Li,Xiayu Zheng,Qiuyu Zheng,Rui Ma,Guangyuan Liu,Yang Liu,Rajeev Ahuja,Wei Luo
Rhabdophane has been considered an important permeable reactive barrier to isolate groundwater radionuclides, and evaluating its precipitation response to different species of radionuclide in acid solutions is critical. In this work, the effects of pH values on the precipitation behavior of Nd 3+ and Sm 3+ into La-rhabdophane are systematically investigated. Some specific issues such as ions removal, precipitation reaction kinetics, and crystal growth affected ions incorporation are discussed in detail, along with uncovering the veil of the Ln (La, Nd, and Sm) leaching mechanism of associated La 0.666 Nd 0.167 Sm 0.167 PO 4 monazite ceramic based on dissolution experiments and density functional theory. The results reveal that Nd 3+ and Sm 3+ can be removed more than 98% in pH = 1 solution within 12 h, whereas uneven precipitation process to form unexpected stoichiometric ratio of rhabdophane has been observed in 30–50 nm short crystal. Grain growth effects based on spark plasma sintering can contribute to homogenize the materials composition with obtaining La 0.666 Nd 0.167 Sm 0.167 PO 4 monazite ceramics. Furthermore, the binding energy of Ln–O in (1 0 0) surface of monazite plays an important role in controlling the leaching stability of Ln 3+ , associated with the leaching activities are energetically favorable in the order of La > Nd > Sm for La 0.666 Nd 0.167 Sm 0.167 PO 4 monazite.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhiwei Zhou,Yongqiang Zhang,Xinwen Liu,Bingchu Mei,Liping Zhou,Jianchun Qin,Dan Yuan
0.5–5 % (atom percent) Nd 3+ -doped SrF 2 transparent ceramics were fabricated by hot-pressed sintering and the effects of Nd 3+ doping content on microstructure and spectral properties were studied. With Nd 3+ content increased from 0.5 % to 5 %, in-line transmittance of Nd:SrF 2 ceramic at 1060 nm increased from 15.8 % to 85.3 %. FE-SEM micrographs showed the grain growth was inhibited and the microstructure became more compact and homogenous. Emission spectra revealed that concentration quenching was occurred at Nd 3+ content of 1–2 %. Emission lifetime of 4 F 3/2 energy level monotonously decreased from 1805.4 μs to 19.6 μs. Evolution profiles of emission intensity and lifetime of Nd:SrF 2 transparent ceramic with Nd 3+ doping content were proposed. The appropriate Nd 3+ content for spectral properties of Nd:SrF 2 transparent ceramic was found around 1 %. The results demonstrated Nd:SrF 2 transparent ceramic has large emission lifetime and mild concentration quenching effect, indicating that Nd 3+ -doped SrF 2 transparent ceramics could be more promising gain media for all-solid-state lasers than other Nd 3+ -doped alkaline-earth fluorides.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2019
·
IF 2.6
S.J. Huang,Y.B. Xiao,J.L. Liu,Y. Ji,L.Y. Mao,W.C. Wang
In this work, a multicomponent GeO 2 –Sb 2 O 3 –BaO (BSG) glass is explored to assess its potential for 1.06 μm fiber lasers . The glass-forming region of BSG system is predicted and determined experimentally based on a thermodynamic method. Benefitting from the incorporation of Sb 2 O 3 , this system possesses an exceptionally large glass-forming region, as well as high density and refractive index , wide infrared transmission range and low phonon energy. Furthermore, an efficient near-infrared emission at 1064 nm from Nd 3+ has been realized in this oxide glass with relatively long measured lifetime (200.58 ± 1.24 μs) and large emission cross-section (3.015 ± 0.090 × 10 −20 cm 2 ), indicating that Nd 3+ -doped BSG glass is a promising candidate for laser application in 1.06 μm region.
研究领域:
光学材料
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玻璃科学
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激光物理
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无机非金属材料
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光子学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 20
·7017-7025
·
IF 4.39
Yonghui Xu,Liang Zhang,Langping Dong,Shuwen Yin,Xiudi Wu,Hongpeng You
Novel single-doped and codoped SrGd2Al2O7-based (SGA) phosphors with tunable emission were synthesized via the solid-state reaction approach. The optimal SGA:0.0008Mn4+ phosphor presents an emission band peaking at 709 nm and shows great red luminescence properties. With the incorporation of Nd3+/Yb3+ into SGA:0.0008Mn4+, an efficient energy transfer Mn4+ → Nd3+/Yb3+ was observed. When Nd3+ and Yb3+ were codoped into SGA:0.0008Mn4+, an energy transfer mechanism from Mn4+ to Nd3+ to Yb3+ was found on the basis of the energy transfer mediation of Nd3+ connecting the Mn4+ and Yb3+ luminescent centers. It results in a strong near-infrared emission in the spectral region of high response of c-Si solar cells, which suggests a potential approach to improve the energy conversion efficiency of c-Si solar cells. The findings offer a novel route to design new down-conversion luminescent materials for the c-Si solar cells.
研究领域:
材料科学
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无机化学
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光电子学
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新能源材料
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固体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）