JOURNAL OF SOLID STATE CHEMISTRY
·
2019
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IF 2.291
Peixi Hao,Linwen Jiang,Hanlei Zhao,Jiangtao Li,Shiwen Qiu,Hongbing Chen
The MFeO 3 : R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders were successfully synthesized by the sol–gel combustion method using glycine-based gel at a low ignition temperature. The as-burnt products present honeycomb-like structure with many irregular continuous pores due to the releasing of a large amount of gas during the combustion reaction process. The lattice parameters and cell volumes of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders are compared in detail. The magnetic properties of all the samples were studied systematically. The results show that the doping of rare-earth ions enhanced greatly the coercivity of GdFeO 3 and LaFeO 3 as a result of the enhancement of magnetic anisotropy . The influence of doped rare-earth ions on the magnetic properties was summarized. The distinction of magnetism of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) were explained in detail by the intrinsic magnetism of doped rare-earth ions. This work is significant for the application of rare-earth elements in other magnetic materials.
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RSC Advances
·
2018
·Vol. 8
·期 23
·12944-12950
·
IF 2.936
Yang Su,Li-Na Hao,Kun Liu,Jun Zhang,Liang Dong,Yunjun Xu,Yang Lu,Hai-Sheng Qian
Upconversion core–shell nanoparticles have attracted a large amount of attention due to their multifunctionality and specific applications. In this work, based on a NaGdF4 sub-10 nm ultrasmall nanocore, a series of core–shell upconversion nanoparticles with uniform size doped with Yb3+, Er3+ and NaDyF4 shells with different thicknesses were synthesized by a facile sequential growth process. NaDyF4 coated upconversion luminescent nanoparticles showed an obvious fluorescence quenching under excitation at 980 nm as a result of energy resonance transfer between Yb3+, Er3+ and Dy3+. NaGdF4:Yb,Er@NaDyF4 core–shell nanoparticles with ultrathin layer shells exhibited a better T1-weighted MR contrast.
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OPTICAL MATERIALS
·
2018
·
IF 2.32
Cheng Zhao,Xu Zhang,Xiaoqing Shu,Xudong Liu,Dawei Fang,Youtao Song,Jun Wang
In this paper, Er-doped carbon quantum dots (Er-CQDs) is first incorporated into CdS quantum dot sensitized solar cells (QDSSCs) for broadening light absorption range and accelerating electron transport . Er-CQDs are prepared by hydrothermal method forming Er-CQDs/TiO 2 film. The CdS quantum dots (QDs) are deposited on Er-CQDs/TiO 2 film by successive ionic layer adsorption and reaction (SILAR) method, constituting CdS/Er-CQDs/TiO 2 photoanode . The structural and optical properties of the CQDs and CdS/Er-CQDs/TiO 2 photoanode are characterized by FT-IR, UV–vis, FL and PL techniques. The composition and morphology are confirmed by XRD , EDX, SEM and TEM techniques. The optical properties of the influence of Er-CQDs on photovoltaic performance of CdS QDSSCs is studied by electrochemical methods. The experiment data show that the photovoltaic performance of CdS/Er-CQDs/TiO 2 working electrode can greatly be enhanced compared that of CdS/TiO 2 . In comparison, the PCE increases from 0.34% of CdS/TiO 2 device to 0.43% of CdS/CQDs/TiO 2 device, whose escalating rate is 26.45%. Furthermore, the PCE increases from 0.34% of CdS/TiO 2 device to 0.59% of CdS/Er-CQDs/TiO 2 device, whose escalating rate reaches 73.53%.
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Chinese Physics B
·
2018
·Vol. 27
·期 9
·097301
·
IF 1.321
Ang Li,Jin-Lei Wu,Xue-Song Xu,Yang Liu,Ya-Nan Bao,Bin Dong
The W18O49 nanoflowers with a diameter of 500 nm are prepared by a facile hydrothermal method. The Er–Yb: NaYF4 nanoparticles are adsorbed on the petals (the position of the strongest local electric field on W18O49 nanoflowers). With a 976 nm laser diode (LD) as an excitation source, the selectively green upconversion luminescence (UCL) is observed to be enhanced by two orders of magnitude in Er–Yb: NaYF4/W18O49 nanoflowers heterostructures. It suggests that the near infrared (NIR)-excited localized surface plasmon resonance (LSPR) of W18O49 is primarily responsible for the enhanced UCL, which could be partly reabsorbed by the W18O49, thus leading to the selective enhancement of green UCL for the Er–Yb: NaYF4. The fluorescence intensity ratio is investigated as a function of temperature based on the intense green UCL, which indicates that Er–Yb: NaYF4/W18O49 nanoflower heterostructures have good potential for developing into temperature sensors.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Yinzhong Liu,Xuechun Yang,Yun Guo,Lingchao Wang,Xiaoshun Wei,Qingjie Wang,Yiyu Qiao,Xiaotao Zhu,Lingli Cheng,Zheng Jiao
n -Butanol, a volatile organic compound with relatively low toxicity, requires precise detection for public health and environmental safety. In this research, metal-organic framework (MOF)-ZnO nanostructures (zinc oxide nano-materials with the utilization of metal-organic frameworks as precursors) doped with rare earth elements (Ce, Eu, and Er) were synthesized via a homogeneous co-precipitation route. The produced samples were comprehensively characterized employing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) method, X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy to evaluate the morphological, structural, and optical characteristics. The gas-sensing capabilities of the RE (Ce, Eu, Er)-ZnO series of sensors were subsequently assessed in comparison to those of pristine MOF-ZnO by adjusting the doping type and ratio of rare earth elements to optimize the sensor performance. Among the materials tested, the 0.08 wt% Eu-ZnO sensor exhibits the best-of-breed sensitivity and selectivity, achieving the impressive response value of 616.11 and the detection limit of 361.52 ppb working at 230 °C under 100 ppm of n- butanol exposure, this achievement attains 8.7 times greater than that of pristine MOF-ZnO (70.72). Moreover, with the aid of ultraviolet excitation, the performance of the 0.08 wt% Eu-ZnO sensor is further enhanced, with the sensitivity response elevating to 1000.65 and 4.3 times greater than that of pristine MOF-ZnO (231), leading to the lower detection limit of 259.70 ppb at 220 °C. These findings underscore the significant potential of rare earth incorporation and UV irradiation playing as the synergistic strategy to augment the gas-sensing capabilities, preeminently in the detection of low-concentration volatile organic compounds.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
To address the two critical issues of low near-infrared (NIR) photon utilization and poor ultraviolet (UV) stability in perovskite solar cells (PSCs), this study synthesized Sm 3+ and Er 3+ co-doped TiO 2 nanorod (NRs) arrays via a hydrothermal method and employed them as the electron transport layer (ETL) for carbon-based PSCs. The incorporation of Sm 3+ and Er 3+ simultaneously improves perovskite infiltration, carrier-transport efficiency, and light absorption performance. Compared with pristine TiO 2 , the Sm/Er co-doped NRs effectively suppress non-radiative recombination, reduce series resistance, improve electron mobility, and prolong carrier lifetime. Furthermore, the introduction of Sm 3+ , Er 3+ into TiO 2 NRs weakens the radial growth of nanorods. A positive bandgap shift and a negative flat-band potential shift were observed after doping. The co-doped PSCs achieved 12 % increase in conversion efficiency when compared with the undoped device. The doped perovskite exhibited strong resistance to ultraviolet-induced degradation. The device has an infrared light efficiency of 0.15 % at the wavelength of 800–1100 nm.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-18
·
IF 12.6
Huang Haoyang,Liu Shaowei,Xu Ligeng,Liang Hengrui,Wu Zihao,Chen Tianfeng,Wang Jinlin,Liu Jun
Though prescribed as first-line drugs for esophageal squamous cell cancer (ESCC) therapy, the antitumor efficacy of Nab-Paclitaxel (Nab-PTX) is still unsatisfactory owing to the limitation on the dosage and therapy duration of Nab-PTX caused by adverse effects. Inspired by the very essential role of Selenoprotein N (SelN) in mediating the calcium homeostasis and the associated redox homeostasis in cells, herein, in this essay, we screened the inhibition effect of selenium-containing drugs in different forms on ESCC cell line. Investigation on KYSE-150 cells demonstrated that Nab-PTX in combination with low dosage of LNT-SeNPs may synergistically improve its antitumor efficacy on ESCC cells through promoting the cellular apoptosis. Proteomics analysis uncovered the core synergistic mechanism of LNT-SeNPs on Nab-PTX was significantly dependent on the endoplasmic reticulum (ER) stress induced by SelN-mediated Ca 2+ -IRE1α, IRE1α(S724)-CHOP-BCL2 axis. SelN knockdown KYSE-150 cell model further confirmed the very indispensable role of SelN in mediating the synergistic effect on Nab-PTX. Moreover, in vivo evaluation on KYSE-150 tumor-bearing mice models also demonstrated the supplementation of LNT-SeNPs with low dosage during the Nab-PTX treatment may synergize the antitumor efficacy and significantly mitigate the adverse reactions or toxicity resulting from a substantial dose of Nab-PTX. Overall, along with the facile accessibility of raw materials, this study reports LNT-SeNPs as a synergistic agent to promote the antitumor efficacy of Nab-PTX, which may be translated as a wide-applicable, efficient and highly safe strategy for clinical treatment of ESCC. Graphical abstract
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BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Hongqi Chen,Fei Yuan,Shaozhen Wang,Juan Xu,YiYan Zhang,Lun Wang
In this work, we design a FRET system for sensitive and selective determination of thrombin in red region, in which NaYF 4 :Yb,Er upconversion nanoparticles (UCNPs) act as donor and gold nanorods (Au NRs) act as acceptor. NaYF 4 :Yb,Er UCNPs with a strong emission at 661 nm were successfully synthesized by tuning the doped ions ratio. Carboxyl-functionalized NaYF 4 :Yb,Er UCNPs and Au NRs were then prepared and conjugated with the thrombin aptamers, respectively. The fluorescence emission band of NaYF 4 :Yb,Er UCNPs ( λ max =661 nm) highly overlaps with the absorption band of Au NRs( λ max =666 nm), which benefits from the large tunability of the spectrum band of Au NRs. A FRET system was then formed when thrombin was added to the mixture of NaYF 4 :Yb,Er UCNPs and Au NRs, which were both modified thrombin aptamers. The fluorescence quenching efficiency of NaYF 4 :Yb,Er UCNPs was increased in a thrombin concentration-dependent manner, which built the principle of thrombin quantification. The linear range was 2.5–90 nM in an aqueous buffer, and 3.75–112.5 nM in spiked human serum samples for thrombin. It also demonstrates a high selectivity to other biological species due to the specific binding. The measurement of thrombin in human plasma is satisfying, suggesting that the FRET system is of practical value in a complex biological sample matrix in red region.
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Journal of Physical Chemistry C
·
2015
·
IF 4.772
Hanlu Zhang,Dengfeng Peng,Wei Wang,Lin Dong,Caofeng Pan
In this study, we report an Er-doped quaternary piezoelectric semiconductor CaZnOS:Er3+ which shows both mechanoluminescence and upconversion luminescence properties. Under mechanical stimulation, green light emission can be observed by the naked eye from a flexible film fabricated by encapsulating CaZnOS:Er3+ particles between two polyethylene glycol terephthalate substrates. The integral emission intensity is proportional to applied pressure, making CaZnOS:Er3+ suitable for dynamic pressure sensing applications. Moreover, the doped sample also shows bright visible emission with near-infrared (980 nm) excitation. The fluorescence intensity ratio between two upconversion emission bands corresponding to 2H11/2, 4S3/2 → 4I15/2 transitions of Er3+ is sensitive to the variation of temperature. As a multifunctional optical material, CaZnOS:Er3+ could be used to not only visualize two-dimensional pressure distribution, through mechanically induced emission, but also sense temperature via the upconversion (UC) luminescence. This work provides a novel kind of multifunctional luminescent material for the development of integrated and coupling devices.
研究领域:
材料科学
·
光学工程
·
传感器技术
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Imran Khan,Hussain Sawwan,Khaled Alsaikhan,Atef El Jery,Kanwal Iqbal,Anam Iqbal,Olajire S. Olanrele
The limited efficiency of water oxidation is a significant challenge in the photocatalytic production of hydrogen peroxide (H 2 O 2 ) without sacrificial agents. Among the different water oxidation reactions, the two-electron water oxidation reaction (2e− WOR) stands out as a promising route for direct H 2 O 2 generation, owing to its favorable kinetics. However, strategies to effectively activate 2e − WOR remain underdeveloped. In this work, we employ a molecular engineering approach to achieve a high density of oxygen vacancy sites on the surface of BiVO 4 (Ov-BiVO 4 ). These vacancies promote favorable interactions with the oxygen-rich ligands of MIL-101 through electrostatic self-assembly, resulting in enhanced growth and reduced formation energy of the material. The optimized photocatalyst demonstrates a remarkable initial photocatalytic H 2 O 2 production rate of 4550.4 μmol g −1 h −1 in pure water, a 38-fold increase compared to the unmodified BiVO 4 . Additionally, the apparent quantum yield (AQY) reaches 12.35% at 420 nm. This enhanced performance is attributed to the synergistic effects of oxygen vacancies, the incorporation of rare earth bimetallic centers, and the Z-scheme heterojunction, all of which facilitate the separation of photogenerated charge carriers. Notably, the unsaturated coordination sites of Ce and Er efficiently promote O 2 adsorption and activate the 2e − oxygen reduction reaction (ORR) pathway, crucial for efficient H 2 O 2 production. MIL-101 further improves the water oxidation reaction, optimizing the redox reaction matching within the system. This work introduces a straightforward molecular engineering method for dual-atom anchoring with tailored coordination environments, emphasizing the importance of redox dual-regulation for achieving efficient H 2 O 2 synthesis.
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Journal of the Korean Ceramic Society
·
2026
·
IF 4.4
Liu Jiahang,Chen Yumeng,Wang Yiyong,Lu Zhe,Zhou Yanwen,Lee Jun-Seob,Choi Heekyu,Li Yan,Guo Honglin,Jung Yeon-Gil
The targeted design of composition and properties for high-entropy rare-earth zirconates (HE-RE 2 Zr 2 O 7 ) using thermal properties tailoring theory represents a research hotspot in the field of thermal barrier coatings. This work designed and synthesized a class of HE-RE 2 Zr 2 O 7 via solid-state reaction by adjusting the mass disorder, size disorder, and electronegativity, including (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Tb 0.2 ) 2 Zr 2 O 7 (#Tb), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Er 0.2 ) 2 Zr 2 O 7 (#Er), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 O 7 (#Yb), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Lu 0.2 ) 2 Zr 2 O 7 (#Lu). The phase composition and crystal structure were analyzed using XRD, Raman spectroscopy, and TEM, and the thermophysical and mechanical properties were evaluated. The results demonstrate that as the size disorder increases, HE-RE 2 Zr 2 O 7 gradually transforms from a single-phase structure to a dual-phase structure coexisting with pyrochlore and fluorite. In terms of thermophysical properties, all materials exhibit low thermal conductivity and good correlation with both size disorder and mass disorder. Among them, #Lu demonstrates the most outstanding thermal insulation performance, which is attributed to its strong Umklapp scattering and point defect scattering. Additionally, under the combined effects of electronegativity, lattice energy, and size disorder, #Lu exhibits the highest thermal expansion coefficient. Importantly, doping with different rare-earth elements increases the material’s configurational entropy and degree of lattice distortion, optimizing the high-temperature phase stability and chemical compatibility from the kinetic perspective. In terms of mechanical properties, #Lu exhibits the lowest Young’s modulus, highest hardness, and fracture toughness, which is attributed to its high internal size disorder and lattice distortion. This work employs thermal properties tailoring theory to customize the composition of high-entropy RE 2 Zr 2 O 7 . It is essential for developing RE 2 Zr 2 O 7 thermal barrier coatings with tunable thermophysical properties.
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MOLECULAR AND CELLULAR ENDOCRINOLOGY
·
2016
·
IF 3.859
Aiyun Li,Shuihong Zhang,Jia Li,Kang Liu,Fang Huang,Baolin Liu
Objective This study was designed to investigate the hypothesis that metformin and resveratrol exhibited the same effect on inhibition of NLRP3 inflammasome activation with regulation of AMPK in adipose tissue exposed to high glucose. Methods To induce adipose tissue dysfunction, we treated epididymal adipose tissue of mice or differentiated 3T3-L1 adipocytes with high glucose (33 mM) for 24 h. Meanwhile, mice were injected with streptozotocin STZ to induce diabetes and followed by oral administration of metformin (200 mg/kg), resveratrol (50 mg/kg) or ER stress inhibitor TUDCA (50 mg/kg) for 7 days. The effects of metformin and resveratrol on ROS production, mitochondrial fission , ER stress, TXNIP/NLRP3 inflammasome activation, inflammation and apoptosis were observed. Results Metformin and resveratrol inhibited ROS-associated mitochondrial fission by upregulating Drp1 phosphorylation (Ser 637) in an AMPK-dependent manner, and then suppressed ER stress indicated by dephosphorylation of IRE1α and eIF2α in the adipose tissue. As a result from suppressing TXNIP/NLRP3 inflammasome activation, metformin and resveratrol inhibited inflammation and reduced cell apoptosis in adipose tissue or adipocytes exposed to high glucose. Conclusion Metformin and resveratrol protected mitochondrial integrity by inhibiting Drp1 activity and prevented NLRP3 inflammasome activation by suppressing ER stress, and thereby protected adipose function from high glucose insult.
研究领域:
药理学
·
内分泌学
·
分子生物学
·
糖尿病研究
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