Science China-Materials
·
2023
·Vol. 66
·期 9
·3696-3705
·
IF 8.1
Wang Yang,Gao Feng,Zhou Shuai,Hu Po,Fu Jiajun
Lanthanide-doped upconversion nanoparticles (UCNPs) have been extensively investigated owing to their unique advantages. So far, the most favored modality of UCNPs is still the classical Yb–A (where A refers to Er 3+ , Tm 3+ , and Ho 3+ )-coupled nanosystems under 980-nm excitation. However, the frequently used Yb 3+ ion with the single-excited 2 F 5/2 state can barely transfer energy to other acceptors owing to its lack of matched excited levels. Herein, a novel strategy is proposed for energy transfer via Ho 3+ as a bridge ion coupling donor-acceptor pairs (e.g., Yb 3+ –Nd 3+ ), where little direct energy transfer occurs, and the involved energy transport mechanisms are investigated. The findings reveal that long-distance energy transportation can occur in the Ho 3+ sublattice owing to the energy migration capability of Ho 3+ and that Ho 3+ as a bridge ion can realize interparticle energy transfer for upconversion luminescence. Moreover, well-designed NaYbF 4 :40%Ho@NaYF 4 :10%Nd core-shell nanoparticles with multimode responsiveness can emit different colored lights under varying excitation wavelengths, which are demonstrated in high-level anticounterfeiting and information identification. Therefore, this work paves a new way to understand the functionality of the Ho 3+ bridge in energy transfer upconversion and offers strategies for broadening energy transfer pathways and finely manipulating photon upconversion.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2022
·Vol. 648
·期 16
·e202200090
·
IF 1.414
Cong Cao,Shiwen Li,Jinsong Wang,Yu Li,Guangshen Li
Nanothermometers that can reflect temperature in real-time are crucial for photothermal therapy. Near-infrared (NIR) fluorescent probes that conform to Boltzmann distribution will play an important role if they have the above characteristics. Here, the LiLuF 4 : Nd 3+ /Yb 3+ nanocrystals were designed and synthesized by control, exhibiting multiple bright near-infrared emission peaks at 925–1080 nm region at 280–360 K under the excitation of an 808 nm laser. The feasibility of being used as a nanothermometer was confirmed by testing the spectral variation with temperature and analysis.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Huining Huang,Huiliang Li,Zeyan Wang,Peng Wang,Zhaoke Zheng,Yuanyuan Liu,Ying Dai,Yingjie Li,Baibiao Huang
In this work, we fabricated NaYF 4 :Yb 3+ ,Tm 3+ @NaYF 4 :Yb 3+ ,Nd 3+ @TiO 2 (Tm@Nd@TiO 2 ) core@shell nanoparticles and investigated their near-infrared (NIR) photocatalytic activities. Comparing to traditional TiO 2 based upconversion (UC) photocatalysts (i.e., NaYF 4 :Yb 3+ ,Tm 3+ @TiO 2 , named Tm@TiO 2 ), Tm@Nd@TiO 2 exhibits enhanced photocatalytic activity under NIR light irradiation. The photocatalytic activity of Tm@Nd@TiO 2 under 980, 808, and 980 + 808 nm laser irradiation is 4.40, 5.84, and 9.83 times as high as that of Tm@TiO 2 under only 980 nm irradiation, respectively. The ethylene degradation rate of Tm@Nd@TiO 2 under 980 + 808 nm laser irradiation is 6.4 times as that of Tm@TiO 2 . The photocatalytic activity of Tm@Nd@TiO 2 under visible + NIR irradiation is even comparable with (∼2/3) that under UV light irradiation during Rhodamine B (RhB) degradation. The enhanced photocatalytic activity of Tm@Nd@TiO 2 can be attributed to the stronger light absorption in NIR region ascribed to Nd 3+ , lower water absorption and the enhanced UC emission of Tm@Nd with unique core@shell nanostructures. This work can provide a possible route to improve the NIR photocatalytic activity and stimulate the applications in many other fields.
研究领域:
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 9
·094001
·
IF 3.404
Zengliang Shi,Yue Duan,Xingjun Zhu,Qiwei Wang,DongDong Li,Ke Hu,Wei Feng,Fuyou Li,Chunxiang Xu
Lanthanide-doped up-conversion nanoparticles (UCNPs) provide a remote temperature sensing approach to monitoring biological microenvironments. In this research, the UCNPs of NaYF4:Yb3+, Er3+@NaYF4:Yb3+, Nd3+ with hexagonal (β)-phase were synthesized and applied in cell temperature sensing as well as imaging after surface modification with meso-2, 3-dimercaptosuccinic acid. In the core–shell UCNPs, Yb3+ ions were introduced as energy transfer media between sensitizers of Nd3+ and activators of Er3+ to improve Er3+emission and prevent their quenching behavior due to multiple energy levels of Nd3+. Under the excitations of 808 nm and 980 nm lasers, the NaYF4:Yb3+, Er3+@NaYF4:Yb3+, Nd3+ nanoparticles exhibited an efficient green band with two emission peaks at 525 nm and 545 nm, respectively, which originated from the transitions of 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 for Er3+ ions. We demonstrate that an occurrence of good logarithmic linearity exists between the intensity ratio of these two emission peaks and the reciprocal of the inside or outside temperature of NIH-3T3 cells. A better thermal stability is proved through temperature-dependent spectra with a heating–cooling cycle. The obtained viability of NIH-3T3 cells is greater than 90% after incubations of about 12 and 24 (h), and they possess a lower cytotoxicity of UCNPs. This work provides a method for monitoring the cell temperature and its living state from multiple dimensions including temperature response, cell images and visual up-conversion fluorescent color.
研究领域:
纳米技术
·
生物物理学
·
细胞生物学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Zhijiao Zhao,Mengmeng Dai,Kejie Li,Guiying Liang,Yanling Wei,Zuoling Fu
The exploration of acquiring excellent thermal performance of luminescence thermometers has become a key focus, owing to their non-contact measurement, high spatial resolution and rapid response. However, many luminescence thermometers still suffer from unsatisfactory relative sensitivity and a single temperature sensing mode. Herein, we report a Lu2CaMg2Ge3O12 garnet structure oxide with a stronger crystal field for ultra-sensitive and multimodal luminescence intensity ratio (LIR) optical thermometry based on the thermally coupled levels (TCLs) of Nd3+ (4F7/2 and 4F3/2) and Er3+ (2H11/2 and 4S3/2), where the relative sensitivity (Sr) can be up to 2.62% K−1 and 1.15% K−1, respectively. Furthermore, the energy level splitting factor Ke, which is used to quantify the energy level splitting extent of the doped ions, is estimated with the help of the dielectric chemical bond theory of complex crystals. As a result of the strong crystal field, the near-infrared (NIR) light-responsive temperature sensing performance of Er3+ (4I13/2) is enabled by the Stark sublevels with the relative sensitivity value of 0.46% K−1. This work not only provides a fresh perspective for developing optical thermometers with outstanding temperature performance, but also provides inspiration for pursuing a multimodal luminescence thermometer.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Rui Yun,Jingqi He,Li Luo,Xiaohua Liu,Zhaogang Nie,Weiren Zhao,Hongli Wen
Upconverting materials excited by near-infrared light are getting attention due to their biological applications in cancer treatment. Er 3+ , Yb 3+ and Nd 3+ tri-doped LiLn(WO 4 ) 2 (Ln = Y/La/Gd) phosphors were synthesized via the typical solid-state method. LiGd(WO 4 ) 2 : Er 3+ , Yb 3+ , Nd 3+ (LGW) phosphors exhibit the most intense green emission under 785 nm excitation among the three doped host materials, which is ascribed to their lowest phonon density and the strong absorption properties. Nd 3+ and Yb 3+ concentration effect on its luminescent properties and the energy transfer of Nd 3+ →Yb 3+ →Er 3+ under 785 nm excitation are discussed. The ratio of integrated intensity from the 4 S 3/2 / 2 H 11/2 → 4 I 15/2 transition of Er 3+ is characteristic of the optical temperature sensing based on fluorescence intensity ratio (FIR). LGW shows high absolute sensitivity about 0.0070 K −1 at 439 K and broad temperature sensing ranging from 200 K to 600 K under the excitation of 785 nm compared with systems doped with Er 3+ . Our significant results predicate the potential applications of this lanthanum-doped tungstate in optical thermometers.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 6
·8149-8156
·
IF 2.478
Yun Rui,Luo Li,He Jingqi,Wang Jiaxi,Li Xiaofen,Zhao Weiren,Nie Zhaogang
Lanthanide-doped system with adjustable multicolor and white up-conversion (UC) emission has been developed in GdVO 4 (GVO): Tm 3+ -Ho 3+ -Yb 3+ /-Nd 3+ phosphors, which are fabricated via a facile solid-state reaction. Herein, we study their phase structures and the Ho 3+ concentration effect on their up-conversion emission. Under 980 nm excitation, the Tm 3+ -Ho 3+ -Yb 3+ tri-doped GVO phosphors exhibit intense luminescence combined with red, green and blue (RGB) emission and the successive energy transfer between Tm 3+ -Ho 3+ -Yb 3+ ions causes a slight shift in the color coordinates of samples with different doping concentrations. Under 808 nm excitation, the color coordinate of the optimum GVO: Tm 3+ -Ho 3+ -Yb 3+ -Nd 3+ phosphor is located at (0.3277, 0.3433), which is closest to the ideal white light emission corresponding to (0.3333, 0.3333). Therefore, it is proved that these phosphors provide potential applications in the fields of displays, lasers and optical telecommunication.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yuhong Zhang,Hongqun Zhu,Xuezhong Yang,Haoran Wang,Qiang Wang,Chunhui Sun,Haozhou Tian,Hang Liu
Here, the Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphors are prepared through solid-state route. The upconversion (UC)/downshifting (DS) luminescence and temperature performances of all samples are investigated in detail. Under 808 nm excitation, the infrared emission band (∼2000 nm) of Ho 3+ ions is obtained. Especially, the energy transfer process of Nd 3+ → Yb 3+ → Ho 3+ has increased the emission intensity of ∼2000 nm. Moreover, the infrared emission band presents thermal enhancement. Under 980 nm excitation, the UC emission band 500–960 nm is investigated. The green and red light of Ho 3+ ion, near infrared light of Nd 3+ ions are achieved. In addition, the possible luminescence mechanism of Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphor is discussed. At last, the optical temperature sensing characteristics of the phosphor are studied according to the luminescence intensity ratio (LIR) technology. The maximum relative sensitivity of Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ reaches 5.476 % K −1 at 293 K. These results prove that the Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphor presents the luminescence in infrared and visible range. The Sr 2 LaNbO 6 :Yb 3+ /Nd 3+ /Ho 3+ phosphor also can be applied to design optical temperature sensor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·Vol. 13
·期 1
·2401957
·
IF 8
Xin Xie,Wanyin Ge,Qian Zhang,Ye Tian,Zili Luo,Shifan Shang,Jianke Liu,Wenbin Cao
Cr 3+ -doped near-infrared (NIR) phosphors have attracted significant attention in recent years. Despite this, achieving high-performance NIR phosphors with broadband emission and excellent thermal stability remains a considerable challenge. This study presents Lu 3 Ga 5 O 12 :Cr 3+ , which demonstrates a tunable emission peak ranging from 705 to 759 nm and an increased full-width at half-peak maximum (FWHM) from 46 to 139 nm by substituting the [Mg 2+ -Ge 4+ ] chemical unit for the [Ga 3+ -Ga 3+ ] unit. Additionally, in Lu 3 MgGa 3 GeO 12 :Cr 3+ , Yb 3+ , an energy transfer channel (Cr 3+ -Yb 3+ ) is constructed. Under blue light excitation, the characteristic emission peaks of Cr 3+ (600–900 nm) and Yb 3+ (900–1100 nm) are observed simultaneously. However, the emission band between 850 and 900 nm is relatively weak, resulting in a discontinuous emission spectrum. To address this, Lu 3 MgGa 3 GeO 12 :Cr 3+ , Yb 3+ , Nd 3+ phosphors are proposed, which exhibit a continuous broadband NIR emission with a FWHM of 253 nm and internal quantum efficiency of 47.3%. The luminescence intensity retains 81% of its room temperature value even at 423 K. Combining this new phosphor with a blue LED chip results in a portable NIR light source with potential applications in non-destructive detection, information encryption, bio-imaging, and NIR remote control. This work offers a novel perspective for developing high-performance NIR phosphors.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Huazhen Liao,Song Ye,Yanling Shi,Deping Wang
Small size optical-magnetic bifunctional upconversion nanoparticles (UCNPs) that can be effectively triggered by 808 nm exhibit distinct advantages of improved tissue penetrating depth, minimized overheating effect, possible for multimodal imaging and high clearance rate, which therefore are considered as desirable candidates for bioapplications. In this research, the 808 nm triggered sub-20 nm β-NaYF 4 :Yb 3+ /Er 3+ @NaGdF 4 :Yb 3+ /Nd 3+ @NaGdF 4 active-core@active-shell@inert-shell structured UCNPs with optical and magnetic bifunctional properties were developed by seed-mediated growth method with NaOA as sodium source instead of the generally used NaOH. Through optimizing Nd 3+ doping concentration and outermost NaGdF 4 inert-shell thickness, the optical-magnetic bifunctional core-shell-shell structured UCNPs exhibited strong UC emission intensity and improved magnetic property . Furthermore, the core-shell-shell NPs were validated to be no cytotoxicity by cell viability assessment. Therefore, this research may open a general avenue for the synthesis of small size multifunctional UCNPs for practical bioapplications without overheating.
研究领域:
纳米材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Mengxin Liu,Jiejun Pan,Xinan Shi,Bingsuo Zou,Daocheng Pan
Rare-earth doped metal oxide nanocrystals with high visible luminescence have been widely used in lighting and display applications owing to their low toxicity, and excellent thermal and chemical stability. However, the room-temperature preparation of near-infrared (NIR) luminescent rare-earth doped metal oxide nanocrystals remains a challenge. Herein, sub-4 nm Yb 3+ /Nd 3+ -doped CaMoO 4 nanoparticles are prepared by a facile room-temperature ligand-assisted coprecipitation method, which can be completed within 1 min under ambient conditions. Short-chain butyric acid and butylamine as binary ligands play a crucial role in the synthesis of NIR luminescent nanoparticles. The as-prepared nanocrystals can be well dispersed in organic solvents such as chloroform since they are capped with butyric acid and butylamine. The energy transfers from MoO 4 2 − ${\rm MoO}^{2-}_{4}$ ions to Yb 3+ and Nd 3+ ions are systematically investigated in CaMoO 4 :Yb 3+ and CaMoO 4 :Nd 3+ nanoparticles, respectively. More importantly, this ultrafast and room-temperature synthesis strategy is particularly suitable for the large-scale preparation of Yb 3+ /Nd 3+ -doped CaMoO 4 nanoparticles (≈23 g) with NIR emission, which provides new ideas and possibilities for the commercial production of extremely small and NIR-emitting nanophosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Lining Sun,Yannan Qiu,Tao Liu,Jin Z. Zhang,Song Dang,Jing Feng,Zhijuan Wang,Hongjie Zhang,Liyi Shi
A series of ternary lanthanide β-diketonate derivatives covalently bonded to xerogels (named as Ln-DP-xerogel, Ln = Sm, Yb, Nd, Er, Pr, Ho) by doubly functionalized alkoxysilane (dbm-Si) was synthesized in situ via a sol-gel process. The properties of these xerogel materials were investigated by Fourier-transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM), diffuse reflectance (DR) spectroscopy, thermogravimetric analyses, and fluorescence spectroscopy. The data and analyses suggest that the lanthanide derivatives have been covalently grafted to the corresponding xerogels successfully. Of importance here is that, after excitation with visible light (400–410 nm), the xerogels all show characteristic visible (Sm3+) as well as near-infrared (NIR; Sm3+, Yb3+, Nd3+, Er3+, Pr3+, Ho3+) luminescence of the corresponding Ln3+ ions, which is attributed to the energy transfer from the ligands to the Ln3+ ions via an antenna effect. Exciting with visible light is advantageous over UV excitation. Furthermore, to the best of our knowledge, it is the first observation of NIR luminescence with visible light excitation from xerogels covalently bonded with the Sm3+, Pr3+, and Ho3+ derivatives. Compared to lanthanide complexes (Ln = Er, Nd, Yb) functionalized periodic mesoporous organosilica (PMO) materials that exhibit similar optical properties reported in our previous work, the Ln-DP-xerogel (Ln = Sm, Yb, Nd, Er, Pr, Ho) in this case offer advantages in terms of ease of synthesis and handling and potentially low cost for emerging technological applications. Development of near-infrared luminescence of the lanthanide materials with visible light excitation is of strong interest to emerging applications such as chemosensors, laser systems, and optical amplifiers.
研究领域:
材料科学
·
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）