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1,070 results on '"Zhang, Jingxian"'

1. Angle-Resolved Magneto-Chiral Anisotropy in a Non-Centrosymmetric Atomic Layer Superlattice

Author

Cheng, Long, Bao, Mingrui, Zhang, Jingxian, Zhang, Xue, Yang, Qun, Li, Qiang, Cao, Hui, Qiu, Dawei, Liu, Jia, Ye, Fei, Wang, Qing, Liang, Genhao, Li, Hui, Cheng, Guanglei, Zhou, Hua, Zuo, Jian-Min, Zhou, Xiaodong, Shen, Jian, Zhu, Zhifeng, Mu, Sai, Wang, Wenbo, and Zhai, Xiaofang

Subjects
Condensed Matter - Materials Science
Abstract

Chirality in solid-state materials has sparked significant interest due to potential applications of topologically-protected chiral states in next-generation information technology. The electrical magneto-chiral effect (eMChE), arising from relativistic spin-orbit interactions, shows great promise for developing chiral materials and devices for electronic integration. Here we demonstrate an angle-resolved eMChE in an A-B-C-C type atomic-layer superlattice lacking time and space inversion symmetry. We observe non-superimposable enantiomers of left-handed and right-handed tilted uniaxial magnetic anisotropy as the sample rotates under static fields, with the tilting angle reaching a striking 45 degree. Magnetic force microscopy and atomistic simulations correlate the tilt to the emergence and evolution of chiral spin textures. The Dzyaloshinskii-Moriya interaction lock effect in competition with Zeeman effect is demonstrated to be responsible for the angle-resolved eMChE. Our findings open up a new horizon for engineering angle-resolved magneto-chiral anisotropy, shedding light on the development of novel angle-resolved sensing or writing techniques in chiral spintronics.

Published
2024

2. Orthorhombic metal carbide-borides MeC$_2$B$_{12}$ (Me=Mg, Ca, Sr) from first principles: structure, stability and mechanical properties

Author

Bystrenko, Oleksiy, Zhang, Jingxian, Sun, Tianxing, Ruan, Hu, Duan, Yusen, Zhang, Kaiqing, and Li, Xiaoguang

Subjects
Condensed Matter - Materials Science
Abstract

First principle DFT simulations are employed to study structural and mechanical properties of orthorhombic B12-based metal carbide-borides. The simulations predict the existence of Ca- and Sr- based phases with the structure similar to that of experimentally observed earlier compound MeC$_2$B$_{12}$. Dynamical stability of both phases is demonstrated, and the phase MeC$_2$B$_{12}$ is found to be thermodynamically stable. According to simulations, Ca- and Sr- based phases have significantly enhanced mechanical characteristics, which suggest their potential application as superhard materials. Calculated shear and Young moduli of these phases are nearly 250 and 540 GPa, respectively, and estimated Vickers hardness is 45-55 GPa., Comment: 11 pages, 4 figures, 3 tables

Published
2024

7. Mechanical properties of AlMgB14-related boron carbide structures. A first principle study

Author

Bystrenko, Oleksiy, Zhang, Jingxian, Fangdong, Dong, Li, Xiaoguang, Tang, Weiyu, Zhang, Kaiqing, and Liu, Jianjun

Subjects
Condensed Matter - Materials Science
Abstract

We examine the effects produced by replacing B-B interlayer bonds by C-C bonds in AlMgB14-related boron network on its mechanical properties. The elastic constants, Vickers hardness and shear strength are evaluated by means of first principle computer simulations on the basis of density functional theory. The results of simulations suggest a possibility of existence of several orthorhombic boron carbide phases with strongly enhanced mechanical properties with the Young modulus and Vickers hardness being within the range of 550-600 GPa and 43-50 GPa, respectively, Comment: 9 pages, 6 figures, 2 tables

Published
2022
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9. The exceedingly strong two-dimensional ferromagnetism in bi-atomic layer SrRuO3 with a critical conduction transition

Author

Zhang, Jingxian, Cheng, Long, Cao, Hui, Bao, Mingrui, Zhao, Jiyin, Liu, Xuguang, Zhao, Aidi, Choi, Yongseong, Zhou, Hua, Shafer, Padraic, and Zhai, Xiaofang

Subjects
Quantum Physics, Physical Sciences, Condensed Matter Physics, two-dimensional (2D) ferromagnetism, correlated oxides, SrRuO3, non-Fermi liquid, weak localization, Nanoscience & Nanotechnology
Abstract

In recent years, few-layer or even monolayer ferromagnetic materials have drawn a great deal of attention due to the promising integration of two-dimensional (2D) magnets into next-generation spintronic devices. The SrRuO3 monolayer is a rare example of stable 2D magnetism under ambient conditions, but only weak ferromagnetism or antiferromagnetism has been found. The bi-atomic layer SrRuO3 as another environmentally inert 2D magnetic system has been paid less attention heretofore. Here we study both the bi-atomic layer and monolayer SrRuO3 in (SrRuO3)n/(SrTiO3)m (n = 1, 2) superlattices in which the SrTiO3 serves as a non-magnetic and insulating space layer. Although the monolayer exhibits arguably weak ferromagnetism, we find that the bi-atomic layer exhibits exceedingly strong ferromagnetism with a Tc of 125 K and a saturation magnetization of 1.2 µB/Ru, demonstrated by both superconducting quantum interference device (SQUID) magnetometry and element-specific X-ray circular dichroism. Moreover, in the bi-atomic layer SrRuO3, we demonstrate that random fluctuations and orbital reconstructions inevitably occurring in the 2D limit are critical to the electrical transport, but are much less critical to the ferromagnetism. Our study demonstrates that the bi-atomic layer SrRuO3 is an exceedingly strong 2D ferromagnetic oxide which has great potentials for applications of ultracompact spintronic devices. [Figure not available: see fulltext.].

Published
2022

10. COVID-19 vaccination before or during pregnancy results in high, sustained maternal neutralizing activity to SARS-CoV-2 wild-type and Delta/Omicron variants of concern, particularly following a booster dose or infection

Author

Mahyuddin, Aniza P., Swa, Hannah L.F., Weng, Ruifen, Zhang, Jingxian, Dhanaraj, Janice P., Sesurajan, Binny P., Rauff, Mary, Dashraath, Pradip, Kanneganti, Abhiram, Lee, Rachel, Wang, Lin-Fa, Young, Barnaby E., Tambyah, Paul A., Lye, David C., Chai, Louis Y.A., Yee, Sidney, Choolani, Mahesh, and Mattar, Citra N.Z.

Published
2024
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23. Materials Packing Integration Platform Based on Spatial Planning Algorithm

Author

Sun, Huiting, Cui, Lijie, Wang, Jiafu, Wang, Jun, Ding, Chenbo, Zhang, Enze, Zhang, Jingxian, Dou, Runliang, Editor-in-Chief, Liu, Jing, Editor-in-Chief, Khasawneh, Mohammad T., Editor-in-Chief, Balas, Valentina Emilia, Series Editor, Bhowmik, Debashish, Series Editor, Khan, Khalil, Series Editor, Masehian, Ellips, Series Editor, Mohammadi-Ivatloo, Behnam, Series Editor, Nayyar, Anand, Series Editor, Pamucar, Dragan, Series Editor, Shu, Dewu, Series Editor, Hemachandran, K., editor, Boddu, Raja Sarath Kumar, editor, and Alhasan, Waseem, editor

Published
2023
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27. Layilin Anchors Regulatory T Cells in Skin.

Author

Mehta, Pooja, Gouirand, Victoire, Boda, Devi P, Zhang, Jingxian, Gearty, Sofia V, Zirak, Bahar, Lowe, Margaret M, Clancy, Sean, Boothby, Ian, Mahuron, Kelly M, Fries, Adam, Krummel, Matthew F, Mankoo, Parminder, Chang, Hsin-Wen, Liu, Jared, Moreau, Joshua M, Scharschmidt, Tiffany C, Daud, Adil, Kim, Esther, Neuhaus, Isaac M, Harris, Hobart W, Liao, Wilson, and Rosenblum, Michael D

Subjects
Cancer, Aetiology, 2.1 Biological and endogenous factors, Inflammatory and immune system, Animals, Carrier Proteins, Cell Movement, Cells, Cultured, Humans, Immune Tolerance, Lymphocyte Activation, Membrane Glycoproteins, Mice, Mice, Inbred C57BL, Mice, Knockout, Models, Immunological, Organ Specificity, Receptors, Lymphocyte Homing, Skin, T-Lymphocytes, Regulatory, Transforming Growth Factor beta, Immunology
Abstract

Regulatory T cells (Tregs) reside in nonlymphoid tissues where they carry out unique functions. The molecular mechanisms responsible for Treg accumulation and maintenance in these tissues are relatively unknown. Using an unbiased discovery approach, we identified LAYN (layilin), a C-type lectin-like receptor, to be preferentially and highly expressed on a subset of activated Tregs in healthy and diseased human skin. Expression of layilin on Tregs was induced by TCR-mediated activation in the presence of IL-2 or TGF-β. Mice with a conditional deletion of layilin in Tregs had reduced accumulation of these cells in tumors. However, these animals somewhat paradoxically had enhanced immune regulation in the tumor microenvironment, resulting in increased tumor growth. Mechanistically, layilin expression on Tregs had a minimal effect on their activation and suppressive capacity in vitro. However, expression of this molecule resulted in a cumulative anchoring effect on Treg dynamic motility in vivo. Taken together, our results suggest a model whereby layilin facilitates Treg adhesion in skin and, in doing so, limits their suppressive capacity. These findings uncover a unique mechanism whereby reduced Treg motility acts to limit immune regulation in nonlymphoid organs and may help guide strategies to exploit this phenomenon for therapeutic benefit.

Published
2021

49. Qualitative screening of 52 illegally adulterated weight-losing compounds in foods by ultra high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry

Author

SUN Jian, ZHU Yanrong, HU Qing, YU Hong, ZHANG Jingxian, LIU Xianxian, and JI Shen

Subjects
ultra high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry, illegal adulteration, weight-losing, food, qualitative screening, Medicine
Abstract

ObjectiveAn analytical method was developed for the qualitative screening of 52 illegally adulterated weight-losing compounds in foods by ultra high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry.MethodsThe samples were extracted by methanol. Waters CORTECS T3 column （100 mm×2.1 mm， 2.7 μm） was used with acetonitrile -0.1% formic acid aqueous solution as mobile phases by gradient elution. The compounds were detected by electrospray ionization mass spectrometry and Q-TOF-MS detector in positive and negative ion mode. A standard spectrum library was established by reference standards， and the qualitative analysis was finished by the comparison of the retention time， parent ion and fragment ion accurate molecular mass of each compound in the sample and the library.ResultsThe method was specific without interference of blank matrix， and repeatable in sextuplicate. The detection limits of 52 compounds in 5 matrix were 1‒100 mg‧kg-1. The method was successfully applied to the analysis of actual samples，and 16 compounds were checked out in 246 samples.ConclusionThe method is accurate， specific and sensitive， which can be used to combat the illegal adulteration behavior effectively.

Published
2022
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