Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17163-17173
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IF 8.067
Xiaoli Luo,Qichen Chen,Hongbo Guo,Cheng Chen,Qianqian Ren,Heng Zhang,Xiaowei He,Wu Zhao
As a new type of optical imaging, fluorescence molecular tomography (FMT) has great potential in the field of biomedicine. However, current fluorescent probes still have some limitations that make in vivo FMT imaging quite challenging. In this study, Cit-NaYb0.98−xF4:2%Tm3+/x%Sr2+ upconversion nanoparticles (UCNPs) were successfully prepared by a one-step hydrothermal method, which overcomes the shortcomings of most organic small molecular fluorescent dyes. Importantly, Sr2+ doping can not only significantly reduce the radius of NaYbF4 but also considerably enhance the 800 ± 10 nm emission by about 35.5 times. CCK-8 assay and confocal laser scanning microscopy images (CLSM) also showed that the toxicity of NaYb0.93F4:2%Tm3+/5%Sr2+ to HeLa cells was decreased due to size reduction. In vitro and in vivo experiments showed that the UCNPs have excellent FMT imaging quality. After using the Compressive Sampling Matching Pursuit (CoSaMP) algorithm for 3D reconstruction, the location error of the fluorophore center was small, and the reconstructed target shape was close to that of the real light source. The reconstruction results further proved the feasibility and efficiency of Cit-NaYbF4:2%Tm3+/x%Sr2+ UCNPs for in vivo FMT imaging. This kind of UCNPs has been applied to FMT imaging and 3D reconstruction in vivo for the first time, promoting the development of FMT technology.
研究领域:
生物医学工程
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光学成像
·
纳米材料科学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Hanyu Xu,Mengmeng Dai,Kejie Li,Aijun Li,Tianqi Sheng,Zuoling Fu
Luminescence intensity ratio (LIR) thermometry based on distinct up-conversion luminescence centers was established in Cs-based fluorides. By contrasting the nonthermally coupled luminescence intensity of Er3+/Ho3+/Tm3+, it is possible to determine which kind of up-conversion emission ion is more suited for the perovskite-like Cs3YF6 material. The best option is Er-doped Cs3YF6 samples with a relative sensitivity (Sr) of 0.96% K–1, according to a comparison of the LIR fitting findings. However, the extremely high absolute sensitivity (Sa) in Cs3YF6: Yb, Tm suggests that Sa is not trustworthy in the LIR temperature evaluation system according to the temperature resolution δT. This work provides recommendations for the LIR temperature sensing design for comparable Cs-based fluorides while minimizing time and expense.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 21
·7322-7329
·
IF 4
Chengyu Zhuo,Zeyu Lyu,Dashuai Sun,Sida Shen,Taixing Tan,Shuai Wei,Zhijun Li,Pengcheng Luo,Hongpeng You
Na2MgScF7 (NMSF) was experimentally obtained for the first time by combining hydrothermal and high-temperature solid-state reactions. X-ray powder diffraction (XRD) combined with Rietveld refinement confirms that NMSF is crystallized in the space group Imma with the cell parameters a = 10.40860(18), b = 7.32804(12) and c = 7.52879(11) Å, α = β = γ = 90° and V = 574.256(24) Å3. Through doping with Tb3+ or Eu3+ ions, downshifting yellow-green or red emission could be achieved in NMSF-based phosphors, respectively. Upconversion emission could also be designed by doping with Yb3+–Er3+, Yb3+–Tm3+, Yb3+–Ho3+ or Er3+. Moreover, the NMSF:Er3+ phosphor exhibited green upconversion emission upon excitation at 980 nm, and it exhibited red emission upon excitation at 1532 nm. Finally, recognizable patterns were obtained under excitation at 254, 365 and 980 nm, indicating that the as-prepared phosphors can be applied to multicolor anti-counterfeiting. Moreover, our synthesis strategy opens up new avenues for the synthesis of novel fluorides.
研究领域:
材料科学
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光学
·
化学
✓ 已验证
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DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Li Wang,Zhichao Jin,Zhongli Zhu
The SiO 2 –B 2 O 3 –Bi 2 O 3 –CaO (SBBC) luminous glass samples, co-doped with Tm 3+ , Dy 3+ , and Eu 3+ ions, were prepared. Upon 362 nm stimulation, the co-activated SBBC glasses exhibited distinct spectral transitions corresponding to Tm 3+ : 1 D 2 → 3 F 4 , Dy 3+ : 4 F 9/2 → 6 H 15/2 , 13/2 , as well as Eu 3+ : 5 D 0 → 7 F 2 in the 400–700 nm. Moreover, the study identified two significant energy transfer mechanisms, Dy 3+ →Tm 3+ and Dy 3+ →Eu 3+ , which contribute to the enhanced photoluminescence of the glasses. The optimal CIE coordinates were determined to be (0.3312, 0.3436), with CCT of 5552 K, as well as color purity of 2.55 %. Importantly, an investigation into the thermal stability of selected glass revealed an impressive ΔT of 140 °C. This study shows the potential value of glass in the field of W-LED.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Syed Jalil Shah,Wenyuan Li,Ying Tang,Yang Hu,Shanliang Jiang,Hui He,Ruimeng Wang,Zhongxing Zhao,Zhenxia Zhao
Fabrication of broad-spectrum response photocatalysts in a controllable manner that can efficiently utilize solar light as much as possible remains a top priority target yet a challenging task. In this work, a facile approach of synchronous bottom-up growth was employed to construct UCNP/NMIL(Ti) nanohybrids via NH 2 -BDC (NH 2 -MIL-125-ligand) linkage between upconversion NaYbF 4 :Tm 3+ nanoparticles (~13-nm) and NH 2 -MIL-125. The ligand sharing integration strategy generated abundant oxygen vacancies and coordinatively-unsaturated-metal sites, efficiently enhanced light absorption, energy-transfer upconversion (UC-PL), photo-induced e - / h + generation, and their separation (CV, EIS, Photocurrent-density). Consequently, UCNP/NMIL(Ti) exhibited excellent acetaldehyde photodegradation activity, with 12.5–77.0-folds higher rate constants ( k a ) than those of state-of-the-art photocatalysts under visible light and high humidity. Furthermore, the photocatalytic activity of UCNP/NMIL(Ti) only declined from 96.0% to 92.5% after five cycling-runs, demonstrating its remarkable photo-catalytic stability. Considering these attributes, the current strategy provides an avenue to synthesize efficient UCNPs/MOF composites for widespread usage in a variety of commercial applications.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Limin Wu,Yihua Pan,Shoulei Xu,Peng Zhang,Wenxia Wu,Yan Hao,Shengdi Ta,Yazhao Wang,Bernard Albert Goodman,Wen Deng
High-quality cubic YSZ crystals were designed with various contents of Er 3+ , Tm 3+ and Yb 3+ to produce white light emission, and grown by the optical floating zone method. The up-conversion luminescence spectra of the crystals under 980 nm laser irradiation show three distinct groups of emission peaks at ∼473 nm (blue) generated by the Tm 3+ 1 G 4 → 3 H 6 transition, 531 and 547 nm (green) from the Er 3+ 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions, and 640 and 662 nm (red) from the Er 3+ 4 F 9/2 → 4 I 15/2 transition. The optical power curve obtained by plotting the up-conversion luminescence intensity against the laser power shows that the blue emission involves a three-photon process, whilst both the green and red emissions are the results of two-photon processes. Overall white light emission was observed with the crystal prepared with 0.05 mol% Er 2 O 3 , 0.5 mol% Tm 2 O 3 and 2.0 mol% Yb 2 O 3 , and this crystal is suitable for use in highly efficient white light emission devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
·
2024
·
IF 32.3
Ming Jiang,Chen Ying,Miao Han,Fan Yong,Wang Shangfeng,Chen Zihan,Guo Zhenhao,Guo Zhixiu,Qi Luyin,Wang Xusheng,Yun Baofeng,Pei Peng,He Haisheng,Zhang Hongxin,Tang Yun,Zhao Dongyuan,Wong Gary Ka-Leung,Bünzli Jean-Claude G.,Zhang Fan
The demand for near-infrared (700–1,700 nm) materials in optical communications, laser sources and biological imaging applications has led to extensive research on lanthanide-doped nanoparticles, owing to their nanostructure modulation and interface property tunability. However, the low molar extinction coefficient of conventional lanthanide sensitizers limits the brightness of lanthanide near-infrared nanoparticles for applications in low-power excitation scenarios. Here we introduce Na 3 CrF 6 , a new crystalline nanoparticle that serves as both sensitizer and host for high-brightness near-infrared emission from lanthanide activators (Er 3+ , Tm 3+ , Yb 3+ or Nd 3+ ). We demonstrate an increase in brightness of up to 370 times compared with the most intense conventional lanthanide-sensitized nanoparticles. This discovery is also validated for other lanthanide-doped nanoparticles sensitized with low-cost transition metals (Mn 2+ or Ni 2+ ). Our transition metal-based nanoparticles represent a powerful toolbox to enable high signal-to-noise-ratio labelling and imaging with low-power excitation sources such as white light-emitting diode or persistent luminescence materials. This work paves the way for next-generation high-brightness near-infrared luminescence systems, suited for a wide range of low-illumination excitation applications.
研究领域:
材料科学
·
光学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Hongjun Fang,Yusong Pan,Minyuan Yin,Chengling Pan
It is an effective method to explore full spectrum responsive photocatalyst for improving their photocatalytic activity. Herein, Ti 3 C 2 −OH/Bi 2 WO 6 :Yb 3+ , Tm 3+ composites were successfully synthesized via a facile hydrothermal method. The resultant Ti 3 C 2 −OH/Bi 2 WO 6 :Yb 3+ , Tm 3+ composites accompanied 2D/2D heterojunction with grid-like porous structure present a significant enhancement of photoactivity towards degradation of RhB under visible and NIR light irradiation. Specifically, the 0.2-Y/T-TB2.8 composite exhibits the best photocatalytic activity for RhB removal, in which the RhB degradation efficiency was 99.8% (Vis-NIR, 30 min), 91% (Vis, 30 min), and 48% (NIR, 160 min). The excellent photocatalytic activity of the composite is attributed to the grid-like porous structure endowing it with an enhanced RhB adsorption, favorable charge separation resulting from the outstanding conductivity of the Ti 3 C 2 −OH, and up-conversion mechanism via energy level transition of Yb 3+ /Tm 3+ . In addition, the radical capture experiments verified that the hole (h + ) plays the important role for degradation of RhB.
研究领域:
材料科学
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环境科学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Ping Xiao,Song Ye,Huazhen Liao,Yanling Shi,Deping Wang
The ability to increase the emission intensity and turn the emission color of upconversion nanocrystals (NCs) will greatly enhance their application scopes. In this research, the sub-10 nm pure β-NaYF 4 : Yb 3+ /Tm 3+ /Ho 3+ core NCs were prepared by using sodium oleate (NaOA) as sodium source instead of the traditional NaOH, based on which the β-NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 core-shell NCs were successfully obtained with seed-mediated growth method. The spectral measurement and the calculated CIE color coordinates revealed that the growing of inert NaYF 4 shell on the active NaYF 4 : Yb 3+ /Tm 3+ /Ho 3+ core NCs can not only effectively increase the upconversion emission intensity, but also realize extended tunable emission from blue to orange by turning Ho 3+ concentration, and a strong white light emission with chromaticity coordinates of (0.32, 0.33) can be obtained in the NaY 0.77 F 4 :0.2Yb 3+ /0.01Tm 3+ /0.02Ho 3+ @NaYF 4 core-shell NCs. Furthermore, the extended color tunability and efficient white white-light generation in the core-shell NCs were demonstrated by NCs-PMMA nanocomposites under 980 nm excitation. The results suggested that the β-NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 core-shell NCs have promising applications in optoelectronic devices such as light emitting diode and three-dimensional display.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Lu Zhensheng,Tang Hongxia,Song Meilin,Yu Changxing,Wang Changwen
In this study, a highly sensitive fluorescence temperature sensing strategy accompanied by color change, based on thermal population and non-radiative transition, has been developed. To enhance the temperature sensitivity in high-temperature regions and to observe significant color changes with the naked eye, the fluorescence spectrum based on thermal population and non-radiative transition has been discussed and designed. The co-doped YVO 4 :Tm 3+ /Er 3+ luminescent material was prepared by the high-temperature solid-phase method. Utilizing the strong absorption of ultraviolet (UV) by the V-O charge transfer band, the material was excited with 310 nm UV light. A significant color change from blue to blue-green and finally to green was achieved in the luminescent material within the temperature range of 450 K. The two fluorescence intensity ratios ( FIR ) were analyzed. In the high-temperature region, the FIR from the non-thermal coupling levels 1 G 4 and 2 H 11/2 satisfy the Boltzmann distribution. The relative sensitivity ( S r ) reached its maximum at 593 K, with a maximum value of 1.74% K − 1 . Temperature uncertainty was analyzed, and CIE chromaticity coordinates were obtained for various temperatures. This strategy increased the sensitivity by 8.5 times at 593 K compared to the thermal coupling level temperature measurement strategy. A color transition recognizable by the naked eye was achieved within the 450 K range, demonstrating thermal anti-behavior, providing a reference for enhancing relative sensitivity in high-temperature regions.
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 27
·4887-4898
·
IF 3.756
Mingzhou Meng,Rui Zhang,Zhenlong Cheng,Xinmeng Fa,Jianghua Yang,Anees A. Ansari,Jun Ou,Christian Wurth,Ute Resch-Genger
A solvothermal method was used to prepare a series of Yb3+/Tm3+/Ca2+ co-doped NaYF4 nanoparticles with different Ca2+ contents. Strong upconversion blue fluorescence could be observed under 980 nm laser excitation of the samples. The effect of different Ca2+ contents on the luminescence intensity was investigated, and it was found that the UV-vis upconversion luminescence increased and then decreased with an increasing Ca2+ concentration during the increase of the Ca2+ content from 0 mol% to 25 mol%, reaching the strongest fluorescence at 15 mol%, which was up to about 28 times stronger than that without Ca2+ doping. Furthermore, the mechanism was investigated, and it was found that the doping of Ca2+ disrupted the symmetry of the crystal field, resulting in a significant enhancement of the overall fluorescence. Applied to fluorescence intensity ratio thermometry, the absolute and relative sensitivities are as high as 0.0418 K−1 and 2.31% K−1, respectively, with a minimum temperature resolution of 0.0129 K.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 10
·4607-4616
·
IF 3.5
Xiaoqing Lai,Przemysław Woźny,Marcin Runowski,Laihui Luo,Peng Du
Tm3+/Yb3+-codoped ZrScW2PO12 microparticles were prepared in order to solve the problems of the severe thermal quenching and unsatisfactory thermometric properties of most luminescent materials. The synthesized materials exhibit a rarely observed negative thermal expansion (NTE) effect, which was verified by in situ X-ray diffraction experiments, performed under high temperature conditions. Upon excitation with a 980 nm laser, bright blue upconversion (UC) emissions originating from Tm3+ were observed. Moreover, owing to the promoted energy transfer, cross-relaxation and non-radiative decay processes at high temperatures triggered by the NTE effect, the observed UC emissions arising from 1G4 and 3F2,3 levels show non-monotonic responses to temperature. By analysing the temperature-dependent luminescence intensity ratio of these UC emissions originating from the non-thermally coupled levels of Tm3+ (1G4 and 3F2,3), the thermometric properties of the prepared microparticles were investigated in detail. Interestingly, the maximum absolute and relative sensitivities of the synthesized compounds are 0.09 and 1.45% K−1, respectively, which are independent of Yb3+ content, but they can be manipulated by employing different sensing modes. Our results manifest that the exploitation of the NTE effect is an efficient way to control the UC luminescence features of rare earth ions and to realize high performance optical thermometry.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）