OPTICAL MATERIALS
·
2020
·
IF 2.779
Ruofeng Wang,Ying Shi,Jianjun Xie,Fang Lei,Lingcong Fan,Ding Zhou
The thulium and holmium co-doped lutetium aluminum garnet (Tm,Ho:LuAG) ceramics were fabricated by vacuum sintering at 1760 °C for 10 h. The raw powders free of sintering aids were synthesized by co-precipitation method. The phase composition, crystalline behaviors, and morphology of the powders calcined at different temperatures were studied by scanning and transmission electron microscopy . Well-dispersed Tm,Ho:LuAG powders with the primary particle size of 80 nm were obtained by calcinations at 1200 °C for 2 h in the muffle furnace. The influence of agglomeration state of starting powder on densification and microstructure of Tm,Ho:LuAG ceramic was explored. The in-line transmittance of Tm,Ho:LuAG ceramic with the thickness of 1 mm reached 83.0% and the corresponding optical attenuation coefficient was about 0.013 mm −1 at 2500 nm. The average grain size of the Tm,Ho:LuAG ceramic was about 1.7 μm. It is promising that the Tm,Ho:LuAG optical ceramic would be a suitable candidate to realize lasers output at 2.1 μm.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Quanhui Zhang,Naikun Sun,Kang Zhao,Meiling Li,Qin Dai,Xinguo Zhao,Juan Cheng,Jiaohong Huang
Magnetic refrigeration in the liquid-helium temperature region plays a significant role in many technological fields. In this work, the crystal structure, magnetic properties, and magnetocaloric effect (MCE) of commercial Yb 2 O 3 and a series of (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds prepared by a feasible high-energy ball milling method were systematically investigated. The crystallography results demonstrate that these Yb 2 O 3 -based compounds have a cubic bixbyite structure with space group Ia 3 ¯ , and the lattice constant increases with the increase of Ho 3+ ions content. Commercial Yb 2 O 3 shows antiferromagnetic (AFM) ordering at 2.35 K, and ball-milled (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds have lower AFM ordering temperatures of RE 3+ moments of 2.30 K, 2.15 K and below 2 K for x = 0, x = 0.1 and x = 0.2 samples, respectively. Thermomagnetic behavior under high magnetic fields exhibited the existence of ferromagnetic (FM) correlation in these compounds, and a high magnetic field could induce an AFM to FM transition. The magnetization of Yb 2 O 3 increases with the increase of Ho 3+ ions content due to the increase of the effective magnetic moments. The maximum magnetic-entropy change Δ S M and relative cooling power RCP of (Yb 0.8 Ho 0.2 ) 2 O 3 are 11.1J/kg·K and 123.2 J/kg, respectively under 5 T, which are 19.4 % and 67.6 % larger than those of commercial Yb 2 O 3 . The (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds have a large MCE under moderate magnetic field changes and there is no thermal and magnetic hysteresis, which is beneficial for application as a promising refrigerant near the liquid-helium temperature range.
研究领域:
材料科学
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低温物理
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2017
·Vol. 25
·期 15
·16916-16921
·
IF 3.307
Maria Pawliszewska,Yanqi Ge,Zhongjun Li,Han Zhang,Jaroslaw Sotor
We report mode-locking in holmium-doped all-fiber laser based on black phosphorus saturable absorber. The generated solitons are centered at 2094 nm with bandwidth reaching 4.2 nm and pulse duration of 1.3 ps. In harmonic mode-locking, up to 10th harmonic (290 MHz) was obtained. Properties of black phosphorus saturable absorber are investigated. Our findings validate black phosphorus suitability for ultrafast applications in mid-infrared.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Zhuoyue Li,Zhenlong Cheng,Maoxiu Huang,Qingkai Chen,Yuanli Liu,Zhiyi He,Jun Ou
In this paper, highly fluorescent, structurally homogeneous, and small-sized NaYF 4 upconversion nanoparticles were synthesized via the hydrothermal method, Yb/Ho/Mn co-doping altered the local symmetry of the crystals, slightly deforming their structure and enhancing the fluorescence intensity of the nanocrystals. The strong green light emission from the synthesized samples was mechanistically explained by energy transfer upconversion combined with excited state absorption process involving Yb-Mn dimers. The highest fluorescence intensity was observed with 15 mol% Mn 2+ , which increased the fluorescence intensity by a factor of approximately 10.88 compared to the undoped sample. Furthermore, this work explored the optical temperature-sensing properties of these upconversion fluorescent nanocrystals for non-contact temperature measurement, leveraging thermal and non-thermal coupling mechanisms. It provided a promising strategy for developing high-performance optical temperature sensors using other transition metal-doped lanthanide materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Jingheng Nie,Bo Zhou,Shaofan Fang,Haizhe Zhong,Henan Li,Yumeng Shi
Inorganic lead-free halide perovskites with a broad-band emission of self-trapped excitons (STEs) have attracted great attention in lighting applications. However, it remains a fundamental challenge to expand the display color gamut because it is difficult to individually tune the emitting proportion at different wavelengths. Herein, we employ a doping route to incorporate Sb3+, Er3+, and Ho3+ ions into the Cs2NaInCl6, which enables multicolor emissions with narrow full width at half-maxima and high photoluminescence quantum yields (PLQYs). The blue emission (445 nm) originates from STEs in the [SbCl6]3– octahedrons, while the narrowband green (550 nm) and red (655 nm) emissions are mainly derived from the Er3+ and Ho3+ ions, respectively. An efficient energy transfer between multiple luminescent centers is the key point to achieve such an efficient and tunable emission. By controlling the lanthanide doping level, the emission color can be systematically modulated, and cold 10401 K (0.278, 0.286) to warm 4608 K (0.347, 0.298) adjustable white-light emission (PLQY of ∼70%) can be achieved successfully. The results provide inspiration for the material design of lead-free perovskites with efficient and tunable light-emitting properties for optoelectronic applications.
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 LUMINESCENCE
·
2023
·
IF 3.6
Chuncheng Zhang,Chaomin Zhang,Chao Yun
In this paper, Er 3+ /Ho 3+ co-doped fluoride glasses were prepared by the high temperature melt-quenching technique. Pumped by the 980 nm LD , as a result of the emission spectra overlapping of Er 3+ and Ho 3+ ions, a broadband mid-infrared emission band from 2530 to 2950 nm with a full width at half maximum of the synthetic fluoride glasses near 231 nm was obtained, which exist latent application in wide band tunable mid-infrared fiber laser. Furthermore, the intense 4.1 μm mid-infrared fluorescence (3600–4400 nm) was obtained and the FWHM was 320 nm. The up-conversion emission peaks around 525, 546 and 660 nm, near-infrared emissions at 1.2 and 1.5 μm together with mid-infrared fluorescence around 2.0 μm was observed in Er 3+ /Ho 3+ co-doped fluoride glass. Moreover, the relevant energy transfer processes were discussed in detail based on the emission spectrum and the energy level transition processes. The results indicate that the fabricated Er 3+ /Ho 3+ co-doped fluoride glasses exist prominent emission features for fiber laser gain medium.
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 NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-19
·
IF 10.6
Luo Yuxiao,Zheng Yifan,Chen Ziwei,Mo Minhua,Xie Jiling,Zhou Xiaohe,Wu Yupeng,Yang Qiyuan,Zheng Manjia,Hu Xiaowen,Chen Liangjiao,Lan Zedong
Background Early angiogenesis provides nutrient supply for bone tissue repair, and insufficient angiogenesis will lead tissue engineering failure. Lanthanide metal nanoparticles (LM NPs) are the preferred materials for tissue engineering and can effectively promote angiogenesis. Holmium oxide nanoparticles (HNPs) are LM NPs with the function of bone tissue “tracking” labelling. Preliminary studies have shown that HNPs has potential of promote angiogenesis, but the specific role and mechanism remain unclear. This limits the biological application of HNPs. Results In this study, we confirmed that HNPs promoted early vessel formation, especially that of H-type vessels in vivo, thereby accelerating bone tissue repair. Moreover, HNPs promoted angiogenesis by increasing cell migration, which was mediated by filopodia extension in vitro. At the molecular level, HNPs interact with the membrane protein EphrinB2 in human umbilical vein endothelial cells (HUVECs), and phosphorylated EphrinB2 can bind and activate VAV2, which is an activator of the filopodia regulatory protein CDC42. When these three molecules were inhibited separately, angiogenesis was reduced. Conclusion Overall, our study confirmed that HNPs increased cell migration to promote angiogenesis for the first time, which is beneficial for bone repair. The EphrinB2/VAV2/CDC42 signalling pathway regulates cell migration, which is an important target of angiogenesis. Thus, HNPs are a new candidate biomaterial for tissue engineering, providing new insights into their biological application.
研究领域:
生物医学工程
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组织工程
·
纳米技术
·
细胞生物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·
IF 1.8
Mengyao Wang,Bin Lu,Bo You,Ruijie Pei,Zhigang Sun,Ji-Guang Li,Yoshio Sakka,Naifeng Zhuang
The nickel element doped holmium oxide (Ho 2 O 3 :Ni) transparent magneto-optical ceramics were fabricated by vacuum sintering and the dopant impacts on structure features and Faraday effects were investigated. The starting oxide powders were synthesized by pyrolyzing the resulting layered holmium-based hydroxide nanosheets prepared from a chemical precipitation route using the sodium hydroxide as precipitant at the freezing temperature. Upon high-temperature sintering, the Ni i • • ${\mathrm{Ni}}_i^{ \bullet \bullet }$ defect is introduced by Ni 2+ substitution for Ho 3+ to form the interstitial solid solution. The 1 at.% Ni 2+ doped Ho 2 O 3 ceramic sample exhibits an in-line transmittance of ∼70.04% at 1 550 nm with a relative density of ∼99.88%, while more Ni 2+ incorporation (e.g., 2‒5 at.%) even leads to a completely opaque state. The magneto-optical transparent Ho 2 O 3 :1%Ni ceramic developed in this work has Verdet constants of ∼−195, −65, and −29 rad/(T·m) at 635, 1 064, and 1 550 nm, respectively, which are ∼1.8-fold higher than the commercial terbium gallium garnet crystal or ∼1.4-fold higher than the pure Ho 2 O 3 ceramic. This material also possesses relatively large figure of merit of ∼14.6°/T at 1 064 nm and relatively high thermal conductivity of ∼7.5 W/(m·K) at room temperature.
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
Nanoscale Research Letters
·
2022
·Vol. 17
·期 1
·1-12
·
IF 5.418
Wang Linxuan,Li Liang,Yuan Maohui,Yang Zining,Han Kai,Wang Hongyan,Xu Xiaojun
Spectrally determination of temperature based on the lanthanide-doped nanocrystals (NCs) is a vital strategy to noninvasively measure the temperature in practical applications. Here, we synthesized a series of SrF 2 :Yb 3+ /Ho 3+ NCs and simultaneously observed the efficient visible upconversion luminescence (UCL) and near-infrared (NIR) downconversion luminescence (DCL) under 980, 940 and 915 nm excitations. Subsequently, these NCs were further utilized for thermometers based on the Boltzmann (thermally coupled levels, TCLs) and non-Boltzmann (non-thermally coupled levels, NTCLs) of Ho 3+ ions in the first (~ 650 nm), second (~ 1012 nm) and third (~ 2020 nm) biological windows (BW-I, BW-II and BW-III) under tri-wavelength excitations. The thermometric parameters including the relative sensitivity ( \(S_{{\text{r}}}\) ) and temperature uncertainty ( \(\delta T\) ) are quantitatively determined on the I 648 / I 541 (BW-I), I 1186 / I 1012 (BW-II), and I 1950 / I 2020 (BW-III) transitions of Ho 3+ ions in the temperature range of 303–573 K. Comparative experimental results demonstrated that the thermometer has superior performances.
研究领域:
生物医学
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liu Ming,Ehsan Ghasali,Ye Cheng,Congya Zhu,Junsheng Ye,Pengfei Zhang,Saleem Raza,Asif Hayat,Yasin Orooji
High entropy oxide (HEO) has shown great potential in the field of new photocatalytic materials due to its tunable composition and excellent thermal stability. In this paper, a high entropy rare earth oxide Er 2 Tm 2 Yb 2 Lu 2 Ho 2 O 15 composed of pure rare earth elements was synthesized by solid phase reaction method (SRM). Its structural and optical properties were investigated by various characterization techniques such as XRD, TEM, SEM and UV-DRS. The results showed that the material elements were uniformly distributed, with a wide light absorption range and abundant defects. To study the photocatalytic properties of the samples, Congo Red (CR) dye was degraded under visible light irradiation. The results show that the Er 2 Tm 2 Yb 2 Lu 2 Ho 2 O 15 high entropy material has excellent photocatalytic activity, showing a degradation rate of 99.2% to 20 mg/L Congo Red (CR) under visible light, showing remarkable stability in the cycle experiment, showing its potential to degrade organic pollutants. At the same time, free radical scavenging experiments and degradation mechanisms are also discussed. This work has reference value for the study of rare earth-based high entropy oxides.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Yuxin Pan,Hui Lin,Jian Liu,Xiaodong Xu,Ruijin Hong,Chunxian Tao,Zhaoxia Han,Dawei Zhang
Yb,Ho:Y 2 O 3 ceramics have been fabricated by Spark Plasma Sintering method (SPS). The microstructure and transmittance of the ceramics sintered from 1623 K to 1673 K were analyzed. The highest in-line transmittance of Yb,Ho:Y 2 O 3 ceramic sintered at 1673 K reached almost 83% at 750 nm with the thickness of 1 mm. The absorption spectra , fluorescence spectra and fluorescence decay curve were recorded at room temperature. The Judd-Ofelt parameters Ω 2 , Ω 4 and Ω 6 were calculated to be 8.33 × 10 −20 cm 2 , 1.81 × 10 −20 cm 2 , and 0.82 × 10 −20 cm 2 , respectively. The intense emission cross section of Yb,Ho:Y 2 O 3 ceramic was 3.43 × 10 −20 cm 2 at 2057 nm with full width at half maximum (FWHM) of 208 nm. The results indicate that Yb,Ho:Y 2 O 3 transparent ceramic can be a promising laser gain medium for laser operation around 2 μm.
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 MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Huaicheng Xiang,Yuheng Zhang,Junqi Chen,Yang Zhou,Ying Tang,Jinwu Chen,Liang Fang
Bi 1– x Ho x VO 4 (0.1 ≤ x ≤ 0.9) ceramics were prepared via a solid-state reaction method, and all the ceramics could be well densified in the 920–980 °C range. The ceramics with 0.1 ≤ x < 0.4 were composed of both monoclinic scheelite (M) and tetragonal zircon (T) phases, and a single M phase could be obtained in the range of x ≥ 0.4. The measured ε r decreased from 58.9 ( x = 0.1) to 14.7 ( x = 0.9), so do the calculated values ( ε r(C − M) = 34.3–12.1), and the main reason for ε r > ε r(C − M) was the rattling of Ho 3+ in the dodecahedron. Two points with zero τ f appeared in Bi 1 – x Ho x VO 4 (0 ≤ x ≤ 1) ceramics, and the best microwave dielectric properties with ε r = 16.6, Q × f = 18,400 GHz ( f = 10.69 GHz), and τ f = +3.29 ppm/°C were obtained in the Bi 0.2 Ho 0.8 VO 4 ceramic. The change in temperature coefficient of ionic polarizability ( τ αm ) caused by the rattling effect of cations is the physical essence that affects τ f . Therefore, the rattling effect can be used as an effective mechanism to regulate τ f in low- ε r materials. Furthermore, there was no chemical reaction between Bi 1 – x Ho x VO 4 and Ag electrode, which indicates potential applications in low-temperature co-fired ceramic (LTCC) technology.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）