VACUUM
·
2025
·
IF 3.9
Quanli Hu,Hanqiong Luo,Chao Song,Yin Wang,Jinghai Liu
HoCrO 3 displays fascinating magnetic characteristics. Owing to the co-presence of Ho 3+ and Cr 3+ ions, complex magnetic interactions are exhibited. A facile electrospinning as well as annealing way was utilized to make Fe-substituted HoCrO 3 nanofibers, which were HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 . The perovskite orthorhombic structures of HoCrO 3 , HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 were revealed by Rietveld refined XRD patterns. With the Fe substitution, the magnetic behaviors of HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 NFs changed from canted antiferromagnetic at low temperature to paramagnetic at high temperature because of the combination of three kinds of magnetic contributions, namely Cr 3+ , Ho 3+ , and Fe 3+ . Fe substitution also enhanced the Cr 3+ ordering temperature from 139 to 161 K. This study should stimulate the development of holmium chromite nanomaterials for data storage devices and sensors.
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
PeerJ
·
2024
·
IF 2.3
Ying Zhang,Fengrui Cheng,Xingrui Cai,Jingping Wu
Background Epstein-Barr virus induced gene 3 ( EBI3 ), a member of the IL-12 family, is known to be involved in malignant progression in a variety of cancers, but its role in melanoma is unclear. The aim of this study was to explore the effects of EBI3 on the malignant phenotype melanoma to reveal its potential as a therapeutic target. Methods In this study, we used bioinformatics to analyze the expression of EBI3 in pan-cancer and verified its expression level in melanoma cells by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). Subsequently, the effects of EBI3 knockdown on cell proliferation, migration and invasion were detected using the Cell Counting Kit-8 (CCK-8) and Transwell assays. Changes in immune-related cytokines were detected by ELISA, and macrophage polarization was observed using immunofluorescence. Finally, the phosphorylation levels of signaling pathways such as Smad3, STAT6 and cGAS-STING were analyzed by Western blot. Results EBI3 was evidently highly-expressed in melanoma, and silencing of EBI3 could visibly suppress the survival and migration/invasion of melanoma cells, concurrent with the increased levels of BAX and CDH1 and the decreased expressions of BCL2 and CDH2 . Meanwhile, EBI3 knockdown diminished the phosphorylation levels of both Smad3 and STAT6 and the levels of immune response-relevant cytokines in melanoma cells, while aggravating the macrophage M1 polarization and the expression of cGAS, p-STING and p-IRE1 α in THP-1 monocyte-derived macrophages co-cultured with EBI3 -silenced melanoma cells. Conclusion This study filled the blank on the involvement of EBI3 in melanoma, hinting the possibility of controlling EBI3 as a therapeutic strategy in the management of melanoma.
研究领域:
肿瘤学
·
免疫学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Ming-Yue Wang,Yun-Yue Yuan,Zhen-Qing Qi,Jia-Yi Chen,Zhan-Guo Jiang,Cai-Hong Zhan
The development of novel systems for the polyoxometalate–organic cage (POC) is an attractive research field for their fascinating topological structures and well-defined functional cavities. Here, we report the successful self-assembly of anionic POC architectures {XW9Ni6L3}4 (X = Si or P and L = p-aminobenzoic acid), comprising Ni6-substituted trivacant lacunary polyoxometalate (POM) and the organic ligand with both rigid COOH and flexible coordination NH2 groups. It is worth noting a Keggin {XW12} (X = Si or P) in the interior cavity, which is not encountered in reported POCs. More remarkably, in the cage architecture, the chiral C3 conformation was generated based on asymmetric coordination arrangement of ligands, which results in the deviation of the polyhedra and the helical arrangement of the ligands and finally constitutes the hierarchical chirality of the {POM4L12} cages. The solution stability, magnetic behavior, and dye adsorption of {SiW12}@{SiW9Ni6L3}4 have also been investigated.
研究领域:
无机化学
·
材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Ruizhuo Li,Jing Dong,Guojun Wu,Limin Gao,Min Yang
Turbidity interference in measurements can reduce the accuracy of fluorescence detection. Conventional turbidity compensation methods directly establish the relationship between turbidity value and fluorescence but cannot accurately characterize the complex interference of turbidity on fluorescence detection. This paper introduces a novel turbidity compensation technique that separates the interference caused by turbidity particles into scattering intensifying and scattering-absorption attenuating components and corrects them separately. First, the scattering spectrum overlapping with fluorescence is estimated and subtracted from the actual sample spectrum to mitigate the fluorescence intensification caused by scattering. Then, attenuation coefficients at different turbidity intervals are calculated to compensate for fluorescence attenuation. Finally, the two components are combined to obtain the final corrected result. Based on the proposed method, the fluorescence spectra data of Platymonas helgolandica var. tsingtaoensis and Synechococcus elongatus undeod is evaluated. The core problem for comper different turbidity interferences were analyzed. Intensifying and attenuating coefficients based on turbidity values and scattering spectra were determined, ensuring adaptability to known and unknown turbidity conditions. The study results show that the fluorescence variation at different concentrations and turbidity levels are influenced by sample concentration and turbidity, exhibiting nonlinear behavior. The compensation model developed was applied to experimental data, achieving a mean relative error of less than 4% and a satisfactory root-mean-square error, significantly enhancing prediction accuracy. This method offers a straightforward and rapid application to detect a wide range of fluorescent substances.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wanjie Xu,Yuanzhi Chen,Liubin Shi,Laisen Wang,Dong-Liang Peng
Binary superparticles formed by self-assembling two different types of nanoparticles may utilize the synergistic interactions and create advanced multifunctional materials. Bi-magnetic superparticles with a core–shell structure have unique properties due to their specific spatial configurations. Herein, we built Mn 3 O 4 @Ni core–shell binary superparticles via an emulsion self-assembly technique. The superparticles are generated with a spherical morphology, and have a typical average size of about 240 nm. By altering the ratio of the two magnetic nanoparticles , the thickness of Ni shells can be adjusted. Oleic acid ligands are crucial for the formation of core–shell structure. Magnetic analysis suggests that core–shell superparticles display dual-phase magnetic interactions, contrasting with the single-phase magnetic behaviors of commonly core–shell magnetic nanoparticles . The calculation on the effective magnetic anisotropy constants indicates that the presence of Ni shell layers reduces the dipole interactions among the Mn 3 O 4 core particles. Due to the presence of Ni nanoparticle shells, the blocking temperature of Mn 3 O 4 is reduced, while the Curie temperature of Mn 3 O 4 is independent on Ni content. Tunable magnetic properties can be achieved by modulating the Ni nanoparticle shell thickness. This study offers insights for the development of core–shell superparticles with varied magnetic characteristics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 21
·7725-7731
·
IF 5.7
Jingxia Wang,Bin Wang,Yifen Wang,Ruixia Yang,Lanfang Wang,Fang Wang,Xiaohong Xu,Yang Liu
Binary transition metal telluride (MTe2−x, 0 ≤ x ≤ 1) nanocrystals (NCs) display fascinating structure- and composition-dependent magnetic properties for potential applications in spintronic devices. However, achieving precise control over the morphology and composition of MTe2−x NCs during synthesis poses significant challenges due to the limited reactivity between the metal and Te as well as the ambiguous reaction mechanisms. Here, we demonstrate a general synthetic approach to produce a diverse range of MTe2−x NCs, including Cr2Te3, MnTe2, FeTe2, CoTe2−x, and NiTe2−x. Specifically, a series of NiTe2−x nanosheets were synthesized by manipulating the feed ratio of Te : Ni and reaction temperature. Our results indicate that the formation mechanism of these binary MTe2−x NCs can be elucidated through the tellurization of preformed metal oxide nanoparticles. The binary MTe2−x NCs displayed different magnetic behaviors including ferromagnetic FeTe2 and Cr2Te3, paramagnetic CoTe2−x and NiTe2−x, and antiferromagnetic MnTe2. Our work establishes a foundation for the synthesis of magnetic MTe2−x NCs with precisely tailored morphology and composition and emergent magnetic characteristics.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 16
·5336-5344
·
IF 4
Lijun He,Jia Yang,Wenbin Guo,Yan Li,Alberto J. Fernández-Carrión,Xiaojun Kuang
A controlled chemical reduction process was performed on LaCrO3 assisted by CaH2 at a relatively low temperature (773 K), and the impact on the photocatalytic and magnetic properties is discussed. The reduction process leads to the formation of oxygen vacancies that enhance photocatalytic properties by acting as traps that retard the hole/electron recombination processes. In addition, the existence of oxygen defects induces some subtle structural modifications, resulting in Cr–O–Cr angle variation that influences the magnetic behavior of the material. Therefore, the use of a controlled chemical reduction process is an effective method for tunning the physical–chemical properties of transition-metal oxide-based materials, even in cases with high chemical stability.
研究领域:
材料化学
·
光催化
·
固体化学
·
功能材料
·
无机化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Le An,Rui Xiang,Heshan Bai
Vitrimers behave like traditional thermosets with good thermal and mechanical properties at service temperature, combined with thermoplastic behaviors above a specific temperature due to their dynamic cross-linked networks. However, there is a lack of effort in studying the mechanical properties of existing vitrimers, which are important for applying them in practical applications. The objective of this work is to experimentally investigate the tensile, compressive, flexural, torsional, and impact properties of a widely studied epoxy-based vitrimer through the various tests: tensile test, compressive test, three-point bending test, torsional test, and pendulum impact test. Since the vitrimer has the same chemical composition as conventional epoxy, all the mechanical tests mentioned above are also conducted on the epoxy for comparison. The results show that the vitrimer is comparable to the epoxy in tensile, compressive, flexural, and torsional properties, while its impact strength is substantially improved. Finally, the thermoplastic behaviors (i.e., reprocessing, recycling, reshaping) of the vitrimer are also studied.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2017
·
IF 2.124
Jianjun Li,Chujun Nie,Beibei Duan,Xu Zhao,Haibao Lu,Weilong Yin,Yibin Li,Xiaodong He
To understand the relationship between mechanical behavior and fiber assembly in electrospun ceramic-based fibrous mats, the tensile performance of silica , silica/polydimethylsiloxane and silica/polymethyl methacrylate hybrid fibrous mats was investigated. Elastic-plastic behavior as a whole was confirmed in the silica-based fibrous mats. The initial isotropy and disordered networks with point contact between the randomly oriented fibers before the tensile test and the highly oriented fibrous bundles with side contact between the aligned fibers after the tensile test were observed using scanning electron microscopy.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 17
·
IF 1.64
Jin Luo,Yanhua Wang,Rong Ren,Weilin Sun,Zhiquan Shen
The layer-by-layer self-assembly technique was used to fabricate a series of multilayer thin films with poly[4′-(4-methacryloyphenyl)-2,2′:6′,2″-terpyridine] (PmPhtpy), polycyanofullerenes, and transition metals (Ni 2+ and Co 2+ ). The polymer PmPhtpy was prepared by free-radical polymerization, and this was confirmed by Fourier transform infrared (FTIR) and 1 H-NMR spectroscopy. The polycyanofullerenes, which were characterized by FTIR, ultraviolet–visible (UV–vis), and 13 C-NMR spectroscopy, was synthesized via the bromination of fullerene and then substitution with a nucleophilic reagent [potassium cyanide (KCN)]. The optical properties of the films were measured by attenuated total reflection infrared and UV–vis spectroscopy, and the results indicate that the driving force of the fabrication of the multilayer film was the coordination interaction. The magnetic behavior was examined as a function of the magnetic field strength at 5 K and the temperature (5–300 K). The magnetic hysteresis loops of the films showed a typical S shape at 5 K; this suggested soft ferromagnetic properties. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40681.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2017
·
IF 2.942
Yuehua Sun,Chaoqun Peng,Xiaofeng Wang,Richu Wang,Junliang Yang,Dou Zhang
Al 2 O 3 polyelectrolyte suspensions containing PAA-PEI complexes have been used for direct ink writing to fabricate complex 3D structures with micro-sized feature. Zeta potential and rheological behavior of the Al 2 O 3 polyelectrolyte suspensions were investigated. The isoelectric point of Al 2 O 3 particles shifts from alkaline region to acidic region as the [COOH]:[NH x ] ratio increases from 0.12 to 3. The rheological results reveal that the 40 vol% Al 2 O 3 suspension with [COOH]:[NH x ] ratio of 0.3 and 15 mg/mL methylcellulose at pH 10 is the optimal suspension for direct ink writing, due to its good shear thinning and viscoelastic behavior . The filament in lattice structure prepared using this polyelectrolyte suspension can maintain its original shape with little spreading. In the micrograph of sample sintered at 1600 °C for 2 h, the uniform size of grains indicates that the structure is fully sintered under this sintering condition.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Caili Dai,Weitao Li,Ya Cui,Yongpeng Sun,Wenjun Wu,Zhongliang Xu,Yifei Liu,Zhe Yang,Xuepeng Wu
To investigate the effects of functional groups on the formation of wormlike micelles, a cationic surfactant, N-tetradecyl-N-(2-hydroxyethyl)dimethylammonium bromide (DM), was synthesized in this work. The viscoelastic behaviors of DM aqueous solution mixed with sodium salicylate (NaSal), sodium benzoate (NaBen) and sodium laurate (NaLau), respectively, have been studied with rheological measurements. Cryogenic transmission electron microscopy (cryo-TEM) and 1 H NMR technology have been employed to investigate the morphology and arrangement of wormlike micelles. The results show that the effects of NaSal and NaLau on wormlike micellar growth are significantly higher than that of NaBen. Superficially, such a great difference in the rheology properties arises from the effect of hydroxyl group in NaSal because this is the sole difference between the NaSal and NaBen. By comparing with NaBen in DM solution, the long hydrocarbon chain of NaLau induces greater hydrophobic interactions between Lau − anions and DM surfactants than aromatic phenyl group of NaBen, and hydrophobic interactions play an important role in the growth of micelles.
研究领域:
化学
·
材料科学
·
表面化学
✓ 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）