NANOTECHNOLOGY
·
2021
·Vol. 32
·期 21
·215202
·
IF 3.874
Guandong Wang,Daiming Liu,Shuangqing Fan,Zhaoyang Li,Jie Su
In this work, high-dielectric-constant (high-k) erbium oxide（Er2O3）film is fabricated using the spin coating method, and annealed at a series of temperatures (from 400 °C to 700 °C). The effect of annealing temperature on the microstructural and electrical properties of Er2O3 nanofilm is investigated. To demonstrate the applicability of the Er2O3 film, the indium oxide (In2O3) thin film transistor (TFT)-based amorphous Er2O3 dielectric film is fabricated at different temperatures. The TFT-based EO-600 shows a low-operating voltage and good electrical properties. The inverter demonstrates that the Er2O3 nanofilm synthesized by the sol-gel method could be a promising candidate as the dielectric layer in a low-voltage electronic device.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Zuodong Liu,Qiyue Pan,Chengwei Zhang,Guo Zhang,Rui Liu,Tingting Xiong,Yongsheng Yu,Peng Liu,Qiangshan Jing
Er, Y:SrF 2 particles co-doped with various Y 3+ buffer ions were prepared after calcined as-synthesized particles at 600 °C, and the residual nitrates and –OH disappear drastically after calcination treatment. XRD and FE-SEM measurements were proposed to identify the crystal structures and morphologies of the Er, Y:SrF 2 particles, respectively. The emission spectra illustrated two distinct emission bands, which can be attributed to the 2 H 11/2 / 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ ions, respectively. The dependence of green to red emission intensity ratio R(g/r) and the decay curves on the Y 3+ buffer ions co-doping contents were investigated to elucidate the emission mechanisms. It was observed that the 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transitions were enhanced relative to 4 F 9/2 → 4 I 15/2 red-emitting transition under 488 nm and 980 nm excitation in high-symmetry Er, Y:SrF 2 particles after co-doped with Y 3+ buffer ions.
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产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2024
·
IF 3.4
Shan Huang,Jiajia Liu,Lingxin Kong,Mengmeng Wang,Yi Liu,Yi Fang,Qi Xiao
This study reports the synthesis of Er-doped, Mn-doped, and Er, Mn co-doped monoclinic BiVO4 photocatalysts via a facile one-pot hydrothermal method. Er6%Mn2%/BiVO4 exhibited a larger specific surface area, bigger pore volume, and smaller average pore size compared to pure BiVO4 and single-doped BiVO4. The co-doping of Er3+ and Mn2+ ions resulted in lattice distortion and crystal particle size reduction of BiVO4, and generated a new impurity level at the bottom of the conduction band, narrowing the band gap and widening the absorption edge of visible light, thus improving the separation efficiency of photogenerated electron–hole pairs. Photocatalytic experiments on rhodamine B showed that Er6%Mn2%/BiVO4 achieved a degradation efficiency of 97.8% under visible light irradiation (λ >420 nm) within 100 min, which is higher than those of BiVO4, Er6%/BiVO4, and Mn6%/BiVO4. The kinetic rate constant (0.0312 min−1) of Er6%Mn2%/BiVO4 was 1.3, 2.2, and 4.7 times higher than those of Er6%/BiVO4, Mn6%/BiVO4, and BiVO4, respectively. The study also identified ·O2− and h+ as the predominant active species involved in the photocatalytic degradation of rhodamine B and demonstrated the excellent stability of Er6%Mn2%/BiVO4 for five cycles of photodegradation experiment. This work highlights that Er6%Mn2%/BiVO4 has great potential as a candidate for treating organic pollutants in water.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Youqiang Huang,Yingjie Zhao,Yuan Liu,Renguang Ye,Liang Chen,Gongxun Bai,Shiqing Xu
Two-dimensional transition metal dichalcogenides (2D TMDs) have drawn considerable attention due to their promising applications in biomedical and optoelectronic areas. However, the emission of 2D TMDs materials and devices is mostly limited from visible to the edge of near-infrared (NIR), which restricts their wide applications. Herein, we develop Er doped WSe 2 nanosheets through cation exchange and ultrasonication-assisted liquid-phase exfoliation. Thanks to the Er ions, the luminescence of 2D nanosheets can be extended to NIR II window. The emission at NIR II range can effectively penetrate several centimeters thick biological tissue. Furthermore, a series of photothermal experiments is also performed with 808 nm laser. The photothermal conversion efficiency of as-produced nanosheets is determined to be as high as 35.2%, which is greatly higher than many previous reports. It suggests that as-prepared nanosheets combining NIR II emission and highly effective photothermal conversion property may be promising as a bifunctional agent for bioimaging and photothermal therapy.
研究领域:
材料科学
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生物医学工程
·
光学
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DOI
高影响因子
OPTICS COMMUNICATIONS
·
2023
·
IF 2.4
Yongbao Xiao,Jinzhong Zhu,Ludong Kuang,Yao Ji,Qilai Zhao,Changsheng Yang,Weichao Wang
Single-frequency fiber lasers (SFFLs) are of pivotal importance across optical communication , scientific research and national defense due to their excellent beam quality, long coherent length and low noise. However, the development of high-gain rare-earth-doped glass fibers, which are the key medium used in the SFFLs, remains a critical scientific challenge. To address this issue, we design and fabricate a single-mode fluoro-sulfo-phosphate-based Er 3 + /Yb 3 + -codoped glass fiber (denoted as FSP-EYDF). The gain properties and laser performance of the FSP-EYDF have been investigated comprehensively. The results show that the small signal gain coefficient of the home-made FSP-EYDF can reach 4.7 dB/cm at 1535 nm, which is three times higher than that of the silica glass fiber. A short piece of FSP-EYDF with a length of only 1.6 cm has been utilized as a gain medium to support an SFFL operating at 1534.4 nm, which has a threshold of ∼ 18 mW and a linewidth of 3.15 kHz. This study indicates that high-gain FSP fibers are promising candidates for compact low-threshold narrow-linewidth SFFLs.
研究领域:
光学通信
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材料科学
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激光技术
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DOI
高影响因子
Polymer Chemistry
·
2015
·Vol. 6
·期 30
·5430-5436
·
IF 5.52
Dongfeng Fan,Xu Fei,Jing Tian,Longquan Xu,Xiuying Wang,Shuqi Fan,Yi Wang
Er organic complexes are generally used in polymer-based optical amplifiers by doping. This study presents a method for creating an Er-containing photosensitive polymer by free radical copolymerization. Two types of Er organic complexes containing polymeric reactivity groups were synthesized and investigated. Er(TTA)2(Phen)(MA), which has high photoluminescence, was polymerized with glycidyl methacrylate (GMA) for use as a novel UV-written polymer material. Poly(GMA-co-Er(TTA)2(Phen)(MA) was prepared with different proportions of Er, and its spectroscopic properties were investigated in detail. Polymer films with the optimum proportion (the molar ratio of GMA and Er(TTA)2(Phen)(MA) was 115 : 1) exhibited good UV-light lithographic sensitivity, narrow near-infrared luminescence, good thermal stability (Td: up to 303 °C), and solvent resistance after crosslinking. Micropatterns with smooth top surfaces were fabricated from the resulting polymer by direct UV exposure and chemical development.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 9
·5013-5027
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IF 3.502
Yongbao Xiao,Yao Ji,Yichen Ye,Shujing Huang,Weichao Wang
Alkali-earth-metaphosphate-based fluoro-sulfo-phosphate M(PO 3 ) 2 –AlF 3 –MSO 4 (MPFS, M = Ca, Sr, Ba) glasses have been developed via simultaneously incorporating fluoride and sulfate into metaphosphate glass. Their glass-forming regions were efficiently determined under the guidance of thermodynamic calculation method. The physical and structural properties of BaPFS glass were investigated in detail. Furthermore, near-infrared spectroscopic properties of Er 3+ -doped BaPFS (Er–BaPFS) glass were studied. Physical parameters, such as Abbe's number ν d (55-75) and nonlinear refractive index n 2 (1.17-1.86 × 10 −13 esu), of BaPFS glass are strongly depended on P/F/S ratio. The structure of BaPFS glass gradually depolymerizes and tends to become multianionic when Ba(PO 3 ) 2 is substituted by AlF 3 and BaSO 4 . Anion-substitution strategy effectively modulates the property and structure of glass, providing a scheme to derive glass materials. In addition, enhanced emission at ~1.5 μm has been observed from Er–BaPFS glass along with large emission cross section (5.0-5.5 × 10 −21 cm 2 ) and long lifetime (6.7-7.3 ms), resulting in large figure of merit (3.46-3.84 × 10 −23 cm 2 ·s), which is a promising candidate for solid-state laser.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Dan Yang,Qingfeng Guo,Libing Liao,Yidi Zhang,Lefu Mei,Haikun Liu
In this paper, K 3 ScF 6 :Er 3+ ,Yb 3+ up-conversion luminescent materials with cryolite structure were synthesized via solid-state method. The X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL) under the excitation of a 980 nm laser with different power density were used to investigate the phase structure, elemental composition , and up-conversion luminescence properties of K 3 ScF 6 :Er 3+ ,Yb 3+ . The quenching concentrations of Yb 3+ and Er 3+ were confirmed to 0.15 and 0.05 (mol concentration) in this system, respectively. Upon 980 nm excitation, the K 3 ScF 6 :Er 3+ ,Yb 3+ showed a typical transition of Er 3+ which contains two main bands in the visible region that green and red. According to the fitting result of the pump power dependence of up-conversion intensity, all the green and red up-conversion emission of K 3 ScF 6 :0.05Er 3+ ,0.15 Yb 3+ belong to the two-photon process. To better understand the origin of radiation and energy transfer mechanism of the red and green up-conversion, the possible mechanism and electron transition process were also discussed.
研究领域:
材料科学
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无机化学
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光功能材料
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固体化学
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发光物理
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Peng Liu,Jiaqiang Liu,Youwen Zhang,Zhiguo Xia,Yan Xu
Design and synthesis of new fluoride upconversion (UC) luminescent materials with controllable morphologies remains a challenge. Here, novel Ba 4 Bi 3 F 17 :Er 3+ /Yb 3+ UC nanoparticles (UCNPs) were discovered and prepared using a simple one-step solvothermal strategy, and the modulation of the morphology and particle size was investigated in detail. Upon 980 nm excitation, the influence of dosage amounts of Yb 3+ /Er 3+ , and the environmental temperatures on the UC luminescent performance were studied in the temperature range of 293–393 K. The maximum relative sensitivities ( S r ) of Ba 4 Bi 3 F 17 :1 mol%Er, 13 mol%Yb material are calculated to be 0.0122 K -1 and 0.0167 K −1 at 293 K, respectively, based on the two energetic levels of ( 2 H 11/2 , 4 S 13/2 ) and ( 2 H 11/2 , 4 F 9/2 ). In addition, the internal heating performance of the Ba 4 Bi 3 F 17 :Er 3+ /Yb 3+ UCNPs was also evaluated in the pump power range of 112–901 mW, and the internal temperature of the UCNPs increased from 296 to 367 K with the increase of excitation power. This work initiates the discovery of the new bismuth-based fluoride nanothermometers and demonstrates the great potential for bifunctional applications in temperature sensing and optical heater devices.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
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
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环境科学
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 1
·1-16
·
IF 21.8
Huang Shan,Wang Mengmeng,Ni Xinjie,Liu Xinqi,Fang Yi,Xiao Qi,Zhang Yue
Catalysts that effectively degrade organic pollutants and exhibit bactericidal properties are highly up-and-compromising for water treatment applications. To overcome the inherent limitation that the rapid recombination of the photogenerated carriers and to extend the practical utility of Bi 2 WO 6 , a flower-like structure of 7 wt.% Er 3+ -doped Bi 2 WO 6 (Er 7% -Bi 2 WO 6 ) capable of oxygen vacancy and crystal defect was synthesized using a straightforward hydrothermal method. Under visible light irradiation (λ > 420 nm), the Er 7% -Bi 2 WO 6 achieved a Rhodamine B (RhB) degradation efficiency of 92% within 80 min, significantly surpassing that of pristine Bi 2 WO 6 . The kinetic rate constant of Er 7% -Bi 2 WO 6 was determined to be 0.0288 min −1 , which is 5.9 times higher than the 0.0049 min −1 observed for Bi 2 WO 6 . Additionally, the bactericidal rate against Escherichia coli after 120 min of visible light exposure was 93.9%, nearly twice that of Bi 2 WO 6 at 49.8%. Density functional theory calculations and experimental results confirmed that doping with Er 3+ introduced lower band gap and more photogenerated carriers, enhanced visible light absorption, and ultimately improved the photocatalytic performance. Electron paramagnetic resonance and radical trapping experiments identified h⁺ and ·O 2 ⁻ as the primary active species generated during the photocatalytic process of Er 7% -Bi 2 WO 6 . The RhB removal rate remained above 90% after five degradation cycles, and the treatment efficacy on actual water samples was 76%. This study highlights the potential of Er-doped Bi 2 WO 6 to enhance both photocatalytic degradation of organic pollutants and bactericidal performance, thereby expanding the application scope of Bi 2 WO 6 in water treatment. Graphical
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
T. Wei,Z. Dong,C.Z. Zhao,P. Li,J. Wu,L.J. Liu,Y.J. Ma,H.Y. Xiao
Er 3+ -doped filled tungsten bronze Ba 6 Ti 2 Nb 8 O 30 –Sr 6 Ti 2 Nb 8 O 30 solid solutions with different Ba 6 Ti 2 Nb 8 O 30 /Sr 6 Ti 2 Nb 8 O 30 ratios (SBTN x ) have been prepared by a high temperature solid-state reaction. The crystal structure has been investigated simultaneously by the Rietveld structural refinement and upconversion photoluminescence (UC-PL) spectra. It is found that the crystal structure of SBTN x changes from TE-FTB symmetry (0≤ x ≤3, space group P4bm) to OR-FTB symmetry (3.5≤ x ≤5.91, space group Pba2) with x increasing. More interestingly, the structure transition of SBTN x system is also revealed by the UC-PL spectra which indicate the intimate correlation between the UC-PL spectra and the structure transition. Furthermore, the underlying origin concerning the variation of UC-PL spectra has been studied from crystal structure aspect which suggests UC-PL spectra can be explored as a structure probe for present filled tungsten bronze solid solutions.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）