Journal of Nano Research
·
2015
·
IF 0.564
Guo Zhang,Rui Tao Chai,Yu Chen,She Ying Dong,Liang Zhang,Xing Hua Li,Yuan Ru Jiang,Wei Hua Guo
NaYbF4: Yb3+, Tm3+ nanoparticles (UCNPs) capped with oleic acid (OA) have been synthesized via high-temperature solvent reaction. The optimization sample of NaYb0.96Er0.02Tm0.02F4 nanoparticles possess spectral purity (the Snw value is bigger than 0.7) and intense near infrared to near infrared (NIR-to-NIR) upconversion luminescence (UCL) (the power of laser is as low as 3.8 W), which makes them ideal and promising platforms for high contrast bioimaging.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Jinbo Zhao,Lili Wu,Chuanjiang Zhang,Tingxi Li,Qinglong Jiang,Feng Wang,Ping Zhao,Jong Eun Ryu,Zhanhu Guo
Petal-like Yb 3+ -Tm 3+ codoped Y 7 O 6 F 9 microparticles were achieved via ionic liquid-assisted (IL) hydrothermal process. The emission efficiency of Y 7 O 6 F 9 :Yb 3+ /Tm 3+ powders is much stronger than that of Y 2 O 3 :Yb 3+ /Tm 3+ sample. Under excitation at 980 nm with an unfocused laser beam under weak pump density of ∼0.1 W/cm 2 (pump power 10 mW), the UC emission of the sample can been seen clearly. Four emission bands at 477, 540, 647 and 692 nm are observed and correspond to the 1 G 4 state to 3 H 6 state, 1 D 2 state to 3 H 5 state, 1 G 4 sate to 3 F 4 state, and 3 F 3 state to 3 H 6 state transition of Tm 3+ ions. The enhanced UC emission is related to high crystallinity and lower effective phonon energy of oxyfluorides. The ionic liquid (IL) of [BMIM][BF 4 ] is used both as the reaction medium and the source of F − .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2026
·
IF 2.4
Qi Zheng,Tianyun Du,Chunqian Xu,Xiuxun Han
The development of efficient near-infrared (NIR) luminescent materials excitable by visible light remains a significant challenge for practical applications in bioimaging and sensing. Here, we report a novel sensitization strategy to achieve high-efficiency NIR-II emission in lead-free halide double perovskites. Cr3+/Tm3+ co-doped Cs2Ag0.6Na0.4InCl6 single crystals were synthesized via a hydrothermal method. The introduced Cr3+ ions reside in a tailored weak crystal field of the Na+-alloyed host and exhibit strong absorption in the visible region. Furthermore, energy is effectively transferred from Cr3+ to Tm3+ activators, thereby overcoming the intrinsic limitation of weak f–f absorption in lanthanide ions. This strategy yields a remarkable enhancement of the characteristic Tm3+ emission at 1226 nm. The optimally doped phosphor, Cs2Ag0.6Na0.4InCl6:30% Cr3+/30% Tm3+ (nominal feed ratios; actual doping concentrations: 0.14% for Cr3+ and 1.57% for Tm3+), achieves a high photoluminescence quantum yield (PLQY) of 35.8% under 340 nm excitation. The phosphor demonstrates excellent environmental stability, retaining 86.87% of its initial intensity after 210 days of storage under ambient conditions. A fabricated NIR phosphor-converted light-emitting diode (pc-LED) successfully enables proof-of-concept applications in non-destructive food freshness analysis and deep-tissue imaging. This work provides a fundamental design principle utilizing transition-metal sensitization in engineered perovskite hosts for high-performance, stable, and eco-friendly NIR light sources.
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yuan Xu,Weiwei Xu,Xiaoci Yan,Guang Li,Haonan Qu,Govindasami Periyasami,Haibing Li,Jing Cheng
Efficient adsorption and separation of rare earth from other similar rare earth wastewater has become an urgent demand for resource utilization of ion-type rare earth minerals in China. Herein, thulium (Tm) ion-imprinted graphene oxide (GO)-doped polyether sulfone (PES) membranes (GO-TII/PES-2 membranes) were prepared, in which ion-imprinted graphene oxide was applied as an efficient Tm3+ ionic ligand in the imprinted layer and polyether sulfone was applied as a carrier in the membrane matrix to achieve the selective adsorption and separation of Tm3+ and neighboring rare earth ions. Combined with an ion rectifier, the separation and purification performances of Tm3+ were explored. The separation factors β(Tm3+/Tb3+), β(Tm3+/Sm3+), β(Tm3+/Nd3+), and β(Tm3+/Ce3+) in the dynamic adsorption process increased significantly from 1.22, 1.04, 1.04, and 1.02 for nonimprinting to 3.07, 3.91, 3.91, and 3.33 for imprinted membranes. The GO-TII/PES-2 membrane adsorbed about three times more Tm3+ than the nonionic-imprinted (GO-NII/PES) membrane by adding a color developer and quantifying Tm3+ based on a fast and easy UV-photometric method. After eight dynamic permeations, the adsorption of Tm3+ by the GO-TII/PES-2 membrane decreased by only 13%, indicating that the membrane has good reuse performance. Additionally, the investigation examined the influence of Tm3+ on wheat seed germination, underscoring its potential application in agriculture and the importance of adsorbing and separating rare earth ions.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
MODERN PHYSICS LETTERS B
·
2024
·
IF 1.8
Yan Fang,Chongjun He,Fangzhou Chen,Yiyang He,Yuangang Lu,Lijuan Liu,Mingjun Xia,Chenguang Deng,Qian Li,Huiting Chen
Gallium-tellurite glass is a new optical material with good transmittance in the infrared region up to 6.5 μ m . Three different tellurate glasses were prepared: TeO 2 –ZnO–Ga 2 O 3 (TZG), TeO 2 –ZnO–La 2 O 3 (TZL) and TeO 2 –ZnO–B 2 O 3 (TZB). X-ray diffraction indicates that no crystal precipitates in the three glass systems, which maintain a stable glass state. Raman scattering experiments and fluorescence emission spectroscopy measurements were carried out on the tellulate glasses doped with the same concentration of Tm 3 + . It was found that the phonon energy of TZG(TeO 2 –ZnO–Ga 2 O 3 )-doped thulium glass is the lowest, and the emission light at 1380 nm is the strongest with ∼ 5 1 nm fluorescence FWHM. These results show that Tm-doped TZG glass is a good luminescent material. Refractive indices were measured by the minimum deviation method. Sellmeier dispersion equation is obtained, which can be used to calculate the refractive index within visible and near-infrared spectral range. Furthermore, different Tm 3 + concentrations (0.4%, 0.8%, 1.2% and 2%) TZG glasses were prepared, the emission spectra and fluorescence lifetime were measured, and the emitted light was strongest when the thulium ion doping concentration is 1.2%. All the results suggest that these newly developed ternary tellurite glass systems are promising candidates for near/mid-infrared laser glass fibers, fiber amplifiers, or lasers.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Lili He,Rui Liu,Chunhua Ge,Li Yang,Kai Jia,Xiangdong Zhang
Rare earth (RE)-doped luminescent materials have shown tremendous potential applications in the optical field. However, it is still a challenge to improve its luminescence properties further. In this study, the Tm 3+ -doped zinc borate (4ZnO·B 2 O 3 ·H 2 O, ZBH) with a flaky-like morphology was successfully prepared by a facile hydrothermal reaction . The photoluminescence (PL) performance of ZBH:Tm 3+ is improved through incorporating yellow N-doped carbon dots (yNCDs). Simultaneously, by changing the content of yNCDs in ZBH:Tm 3+ host, the morphological evolution from flaky-like to flower-like of the ZBH:Tm 3+ /yNCDs composite are realized. The ZBH:Tm 3+ /yNCDs composite with flower-like exhibits the strongest white light emission and splendid thermal stability under 360 nm excitation wavelength, matching the current mainstream near-ultraviolet (NUV) LED chip. Thus, ZBH:Tm 3+ /yNCDs composite might be a promising luminescent material in the NUV white lighting and display fields. The findings of this study developed a novel idea for improving the luminescent properties of RE-doped materials. Besides, it also solves fluorescence quenching problems of carbon dots in the solid-state illumination field.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Hongyu Liu,Jiabei Li,Pengfei Hu,Songqiang Sun,Liyi Shi,Lining Sun
Manganese-zinc ferrite is a kind of very important magnetic ferrite material. The properties of wide absorption band, sensitivity to ultraviolet (UV) light and tumor H 2 O 2 promise it to be possibly used as a photothermal therapy (PTT), photodynamic therapy (PDT) and chemodynamic therapy (CDT) agent. Based on the unique advantages of rare-earth doped nanoparticles , an Er 3+ , Tm 3+ co-doped upconversion-mediated nanosystem with manganese-zinc ferrite shell (named as UCNPS@M) was developed through a facile thermal co-decomposition method. The final nanosystems were surface-modified by using dopamine hydrochloride (DA) in order to warrant good biocompatibility (named as UCNPS@M@DA). Under irradiation of near-infrared (NIR) light, UCNPS emit both ultraviolet and visible light. The UV light is mostly absorbed by manganese-zinc ferrite shell to produce reactive oxygen species (ROS), which is essential to the potential PDT and CDT effect of nanosystems, and at the same time, Mn 0.5 Zn 0.5 Fe 2 O 4 can further react with H 2 O 2 to promote the efficiency of •OH-generation. It is expected that UCNPS@M@DA can act as upconversion luminescence imaging guidance due to the visible emission from UCNPS. In addition, the energy absorbed by the nanosystems can be transferred to heat to realize photothermal effect. Moreover, UCNPS@M@DA was successfully applied as a T 1 / T 2 -weighted magnetic resonance imaging (MRI) contrast agent due to the existence of Gd, Mn, and Fe elements. In light of the upconversion luminescence (UCL) imaging from the UCNPS as well as potential PTT, PDT, CDT effect mentioned above, this work provides a possibility to realize cancer multi-model bioimaging guided treatment by using an all-in-one diagnosis and therapy nanosystem through a simple yet powerful strategy.
研究领域:
材料科学
·
生物医学工程
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 6
·1-13
·
IF 2.127
Cheng Yuan,Sun Kangning
YVO 4 :Yb 3+ ,Er 3+ ; YVO 4 :Yb 3+ ,Tm 3+ ; and YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ were all synthesized via sol-gel method with a subsequent thermal treatment. Specifically, YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ phosphors were prepared with different annealing temperatures to study the influence of temperature. The transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffractometer (XRD), and photoluminescent (PL) spectrofluorometer were used to investigate the morphology, crystal structure, and up-conversion luminescent properties of all samples. In summary, all samples were granular-like nanoparticles and well crystallized with the same tetragonal phase as YVO 4 . Under the irradiation at 980 nm, YVO 4 :Yb 3+ ,Er 3+ phosphors can generate green emission at 525 and 553 nm and red emission at 657 nm, while YVO 4 :Yb 3+ ,Tm 3+ phosphors can generate blue emission at 476 nm, red emission at 648 nm, and near-infrared emission at 800 nm. Notably, YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ samples can exhibit green emission, blue emission, red emission, and near-infrared emission at the same time, which might endow the as-prepared samples with potential applications in many fields, such as luminous paint, infrared detection, and biological label.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 40
·19031-19038
·
IF 7.233
Qiuhong Min,Lei Zhao,Yushuang Qi,Jing Lei,Wenbo Chen,Xuhui Xu,Dacheng Zhou,Jianbei Qiu,Xue Yu
An amorphous layer acting as a quenching center at the surface of oleic acid-capped NaGdF4:Yb3+/Tm3+ nanoparticles is observed directly, which can be reconstructed via a novel post-chemical annealing process. The amorphous phase of the surface layer of NaGdF4:Yb3+/Tm3+ nanoparticles gradually crystallizes as the post-chemical annealing temperature increases; meanwhile, the good dispersibility of the as-obtained nanoparticles is maintained. The reduction of surface defects and higher local symmetry of the crystal field environment around the doped rare-earth ions contribute to drastically increased up-conversion (UC) emission intensity of the NaGdF4:Yb3+/Tm3+ nanoparticles. In particular, the blue emission of Tm3+ at 450 nm enhances 10-fold after the post-chemical annealing process at 250 °C compared with the counterpart without further surface-state treatments. The color gamut of well-crystallized NaGdF4:Yb3+/Tm3+ with a modified surface covers the blue to yellow region in CIE chromaticity coordinates via a non-steady-state UC process. The results indicate that the surface states of these UC nanoparticles can be feasibly improved via the post-chemical annealing process without encouraging agglomeration, which further optimizes their UC properties for practical applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yinghao Wei,Sen Yang,Chenyang Zhang,Guanying Chen,Ai-Hua Li
In recent years, lanthanide doped materials have been extensively studied in the field of fluorescence temperature sensing due to their abundant emission levels and sensitive thermal response. Temperature sensing based on fluorescence intensity ratio (FIR) of upconversion nanoparticles has the advantages of fast temperature response, non-aggressiveness, and high spatial resolution. However, the most reported FIR sensing has limited sensitivity, probably due to the use of thermal coupling levels. Herein, we report a novel FIR temperature measurement based on non-thermal coupling levels of NaGdF 4 :Yb 3+ /Er 3+ @NaGdF 4 @NaGdF 4 :Yb 3+ /Tm 3+ core-shell-shell nanostructure , which has high sensitivity and robustness simultaneously. The relative sensitivity based on I 801 / I 654 and I 801 / I 841 of Tm 3+ to Er 3+ can reach up to 4.56 (303 K) and 3.82% K −1 (313 K), respectively. Between them, FIR of I 801 / I 841 is independent of excitation power and time. These results show the great potential of FIR based on non-thermal coupling levels in high-sensitive and robust temperature sensors .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2023
·Vol. 10
·期 8
·086201
·
IF 2.3
Bing Liu,Jingheng Liang,Lili Wang,Zian Cheak Tiu
β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals are synthesized by a facile hydrothermal route. The up-conversion (UC) luminescence and photoelectric effects are enhanced simultaneously with the introduction of Zr4+ ions under IR excitation. With the Tm3+ ions fluorescence spectra under 980 nm excitation, the blue and red emissions reached the highest intensity in the case of 4 mol% Zr4+ doping. Taking the advantage of Zr4+ stimulates the free electrons transfer from the valence band (VB) to the conduction band (CB) in β-NaYF4:Yb3+/Tm3+/Zr4+ microcrystals, the photocurrent reached the highest intensity in the case of 4 mol% Zr4+ doping at 780 nm excitation. The β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals with both enhanced UC luminescence and photoelectric properties are highly potential to contribute in photovoltaic and infrared sensors application.
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
·
2023
·
IF 5.2
Zhichao Liu,Xiuxia Yang,Xue Yu,Jianqiang Xiao,Peng Zhang,Daiyuan Liu,Jian Zhang,Xuhui Xu,Jianbei Qiu
The differences in the luminescent performance of phosphors determine their application in diverse occasions. However, the development of Eu 2+ ion doped phosphors materials with high optical properties is not satisfactory due to the harsh synthesis conditions. Herein, a series of Sr 4 Al 14 O 25 : Eu 2+ , Nd 3+ , Tm 3+ are constructed by high temperature solid reaction without applying reducing gas and protective gas. The charge mismatch caused by the unequal substitution promotes the spontaneous reduction of Eu 3+ ions to Eu 2+ . Nd 3+ and Tm 3+ are co-doped into Sr 4 Al 14 O 25 : Eu 2+ to regulate the trap structure, and photoluminescence , long persistent luminescence, photo-stimulated luminescence and mechanoluminescence of Eu 2+ ions are simultaneously achieved in Sr 4 Al 14 O 25 : Eu 2+ , Nd 3+ , Tm 3+ . The relationship between trap and optical performance is explored in detail, and the temperature effect during mechanoluminescence is demonstrated for the first time. This research provides a new idea for the rapid synthesis of highly optical performance Eu 2+ -doped phosphors in air.
研究领域:
材料科学
·
光学工程
✓ 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）