JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Boxu Xu,Chao Song,Jie Song,Rui Huang,Zhenxu Lin,Yi Zhang,Shaomin Lin,Jun Song
In this study, a series of well-crystallized Yb 3+ /Er 3+ /Tm 3+ -tridoped Y 2 O 3 –ZnO ceramic phosphors were prepared using sol–gel synthesis, and the phosphor structures were studied using X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis . The phosphors had excellent physical stability and porous structure. All phosphors generated blue, green, and red emission bands attributed to Tm: 1 G 4 → 3 H 6 , Er: 2 H 11/2 ( 4 S 3/2 )→ 4 I 15/2 , and Er: 4 F 9/2 → 4 I 15/2 radiative transitions , respectively. The emissions were intensified twice by tuning the Tm 3+ ratio in the host matrix Y 2 O 3 and ZnO parts. The color coordinates were adjusted by tuning both the Tm 3+ concentration and the excitation laser pump power to shift the color coordinates and only enhance the brightness, respectively. Meanwhile, heating phosphors can also linearly adjust the color coordinates of the luminescence. Therefore, it can also be used as a fluorescence thermometer in the field of temperature sensor . The study findings will broaden the phosphor practical application potential.
研究领域:
材料科学
·
光学
·
陶瓷
·
发光材料
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Li Chen,Hailian Li,Ji Chen,Deqian Li,Tianchi Liu
Incomplete stripping and high acidity consumption were the major drawbacks for the separation of heavy rare earth elements (HREEs) by the popular extractant 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507). This article studied di-(2-ethylhexyl) phosphinic acid (P227) from thermodynamics and kinetics theoretical researches to cascade extraction simulations for the separation of HREEs. P227 was capable of complete stripping for HREEs with low acidity, and had high organic REE loading with clear and fast phase separation. Constant interfacial area cell with laminar flow was implemented to reveal the different kinetics mechanisms for the extraction and stripping of Lu 3+ . The multi-stages of cascade extraction simulation designed for the separation between Er 3+ /Tm 3+ could be of great significance for practical application. Corresponding products with high purity at both exits obtained successfully via the simulation. All these will provide the promising industrial applications of P227 with more fundamental data and guidance.
研究领域:
化学工程
·
稀有金属提取
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3711-3717
·
IF 1.339
Liu Yunxia,Liu Baocang,Xu Guangran,Wang Qin,Hu Wenting,Liu Yang,Jia Wenjing,Liu Yongxin,Zhang Jun
Upconversion luminescent NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were successfully synthesized via a facile and one-pot solvothermal method using oleic acid/oleylamine (OA/OM) as surfactants. The effects of synthetic parameters including rare earth
ion doping concentrations and temperatures on the crystal phase structure, size and shape of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were systematically investigated. By modulating the synthetic parameters, the shape of NaYF4:Yb3+,
Er3+/Tm3+ nanocrystals were controlled in forms of nanorods and nanowires. The reaction temperature has large effects on the phase structure of NaYF4:Yb3+, Er3+/Tm3+ nanorods, exhibiting a phase transformation from cubic phase
(α-) in low temperatures to hexagonal phase (β-) in high temperatures. Moreover, the upconversion luminescence of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals was found to be dependent on the rare earth ion doping concentrations and
temperatures.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Yong Tang,Qiuyue Ran
This paper synthesized Y 2 O 3 : Yb 3+ /Er 3+ /Tm 3+ fluorescent crystals (YET) by annealing using the laser zone melting method. When the 365 nm(UV) and 980 nm(IR) lasers are excited together, the luminescence color of YET can be changed by adjusting the laser power. It can be adjusted between orange-red, yellow-green, and white. The temperature sensing characteristics based on the fluorescence intensity ratio (FIR) of non-thermally coupled levels (NTCL) and thermally coupled levels (TCL) of Tm 3+ and Er 3+ ions were studied. The derived maximum relative sensitivity ( S R ) reached the impressive value of 10.871 K -1 (303 K) and 0.511 %K −1 (563K), respectively. Moreover, as the temperature increases, the luminescence of the YET emission changes from white to blue. So, the luminescence emitted by YET can be adjusted between red, green, blue, and white. Therefore, using dual lasers to excite fluorescent materials can provide a suitable method for color-adjustable phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Zengchao Yu,Xiaoxiao Li,Xin Wang,Yanmin Yang
In this paper, Yb 3+ /Er 3+ , Yb 3+ /Tm 3+ and Yb 3+ /Er 3+ /Tm 3+ co-doped β -NaYF 4 up-conversion fluorescent nanoparticles (UCNPs) with an average diameter of 50 nm were successfully synthesized through a thermal decomposition method. The Yb 3+ /Er 3+ co-doped UCNPs possess bright and tunable luminescence varying from green to red as the ratio of Yb 3+ and Er 3+ doping increases. Remarkably, white up-conversion luminescence can be successfully achieved through the incorporation of Tm 3+ . The white light up-conversion efficiency of Yb 3+ /Er 3+ /Tm 3+ co-doped UCNPs dispersed in the solvent have been calculated, suggesting the potentials of the efficient white up-conversion emissions for the multispectral imaging and potential bio-applications.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xuan Liu,Xiaojia Su,Zhuohang Ren,Lingqiu Yang,Xinyue Zhang,Mingye Ding
Currently, developing advanced optoelectronic materials is of great importance to solving serious problem of fake and shoddy products. Lanthanide-doped nanomaterials are particularly suitable for addressing this issue, but limited by the realization of multiple upconverison (UC) emissions upon a single-wavelength laser excitation. Herein, it is proven that the co-dopant of blue/near-infrared (NIR)-emitting activators (Tm 3+ ) and green/red-emitting centers (Er 3+ ) in a particular designed core–shell nanoarchitecture allows the achievement of multiple luminescence over wide spectral region for optical security. In our study, cubic-phased NaYbF 4 :Tm/Er@CaF 2 nanocrystals have been successfully synthesized through a layer-by-layer coprecipitation strategy, which presents visible multicolor UC luminescence and invisible NIR UC emission upon 980 nm laser excitation by just regulating the laser power and temperature. Significantly, the unique luminescent characteristics enables the designed UC nanoparticles a promising candidate for advanced anti-counterfeiting. This works offers a reference to develop advanced optoelectronic materials for practical application in optical security.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
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
RSC Advances
·
2015
·Vol. 5
·期 82
·66807-66814
·
IF 3.84
Bin Zhou,Youfa Wang,Donglin Xia
Pure β-KYF4 nanocrystals codoped with Er3+/Yb3+ and Tm3+/Yb3+ were successfully synthesized via the thermal decomposition of trifluoroacetate precursors using oleic acid and octadecylene as coordinating solvents. The up-conversion optical properties of the β-KYF4 nanocrystals with different lanthanide (Ln)-doped ions (Yb3+/Er3+, Yb3+/Tm3+) were investigated. It is found that the colloidal dispersion of β-KYF4:Yb,Er/Tm nanocrystals display strong multiple up-conversion emission spanning from the deep UV-to-NIR regions under 980 nm excitation. Pure β-KYF4 nanocrystals codoped with Er3+/Yb3+ and Tm3+/Yb3+ can emit bright blue, green, yellow, and red emissions visible to the naked eye by adjusting the concentrations of Yb3+ sensitizer ion and Er3+ or Tm3+ activator ions. Moreover, the UC luminescent colors can be tuned for the four colors from blue to green to yellow and finally to red emission in the β-KYF4:X%Yb3+/(0.2%–2%)Er3+ and β-KYF4:25%Yb3+/0.2%Tm3+ colloidal samples. This work substantially expands our understanding of this category of KYF4 upconversion nanocrystals.
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
·
2025
·
IF 5.6
Defu Xu,Xiao Xiao,Qiang Fan
The development of multi-mode self-calibrated photothermal thermometers for high-temperature applications is critically needed. However, most existing strategies are limited by single mode and severe thermal quenching. To address this, activator Er 3+ , Tm 3+ , and sensitizer Yb 3+ co-doped Y 2 W 3 O 12 (YWO) negative thermal expansion (NTE) phosphors have been developed, which exhibit effective resistance to thermal quenching in the up-conversion luminescence under 980 nm excitation. Moreover, an abnormal 3-photon-dominated up-conversion process was observed in YWO:18Yb/2Er/0.5Tm powder, attributed to the cross-relaxation (CR) between Er 3+ and energy transfer (ET) from Er 3+ to Tm 3+ . In addition, benefiting from the effect of NTE and the limited ET process in YWO:18Yb/2Er/0.5Tm, the relative intensity of the temperature-dependent up-conversion from the 2 H 11/2 , 4 S 3/2 , and 1 G 4 level, as well as their state splitting luminescence, exhibit distinct disparities. Furthermore, based on the luminescence intensity ratio (LIR) technique, a four mode self-calibrated optical thermometer using YWO:18Yb/2Er/0.5Tm powder is designed. The thermometer exhibits acceptable sensitivity, with absolute sensitivity ( S a) and relative sensitivity ( S r) reaching 0.006 K -1 at 293 K and 0.26% K -1 at 543 K, respectively. The developed thermometer could provide a reference for self-calibration, and its wide spectral operating range ensures the reliability of temperature sensing, which has the potential to be used in some high-temperature conditions.
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
·
2015
·
IF 6.723
Xia Xu,Zhuo Wang,Pengpeng Lei,Yingning Yu,Shuang Yao,Shuyan Song,Xiuling Liu,Yue Su,Lile Dong,Jing Feng,Hongjie Zhang
Novel flower-like α-NaYb(Mn)F4:Er3+/Tm3+@NaYF4 upconversion nanoparticles (UCNPs) as luminescent nanothermometers have been developed by combining liquid–solid solution hydrothermal strategy with thermal decomposition strategy. Under 980 nm excitation, they exhibit intense upconversion luminescence and temperature-dependent upconversion luminescence over a wide temperature range. The influence of temperature on “band-shape” upconversion luminescence (UCL) spectra and the intensity of emission bands are analyzed and discussed in detail. We further successfully test and verify that intensity ratios REr of 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 and RTm of 1G4 → 3H5 and 3H4 → 3H6 are sensitive to temperature, and the population of active ions follows Boltzmann-type population distribution very well. These luminescent nanothermometers could be applied over a wide temperature range from 123 to 423 K with high sensitivity, which enable them to be excellent candidates for temperature sensors.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 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）