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arXiv 2017年

作者： Rath, Pranati K. Samal, Pramoda Kr. Panda, Srikanta Mishra, Debesh D. Aluri, Pavan K. Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Theoretical Physics Center for Science Facilities Chinese Academy of Sciences Beijing100049 China Department of Physics Utkal University Bhubaneswar Odisha751004 India State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Korea Institute for Advanced Study Quantum Universe Center 85 Hoegi-ro Dongdaemun-gu Seoul02455 Korea Republic of Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejeon305348 Korea Republic of

We apply our symmetry based Power tensor technique to test conformity of PLANCK Polarization maps with statistical isotropy. On a wide range of angular scales (l = 40 − 150), our preliminary analysis detects many statistically anisotropic multipoles in foreground cleaned full sky PLANCK polarization maps viz., COMMANDER and NILC. We also study the effect of residual foregrounds that may still be present in the galactic plane using both common UPB77 polarization mask, as well as the individual component separation method specific polarization masks. However some of the statistically anisotropic modes still persist, albeit significantly in NILC map. We further probed the data for any coherent alignments across multipoles in several bins from the chosen multipole range. Copyright © 2017, The Authors. All rights reserved.

关键词： Polarization

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Revealing the Interfacial Chemistry of Fluoride Alkyl Magnesium Salts in Magnesium Metal Batteries

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Angewandte Chemie 2023年第21期135卷

作者： Juncai Long Dr. Shuangshuang Tan Junjun Wang Dr. Fangyu Xiong Lianmeng Cui Prof. Qinyou An Prof. Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China College of Materials Science and Engineering Chongqing University Chongqing 400030 China Wuhan University of Technology (Xiangyang Demonstration Zone) Xiangyang 441000 China

Exploring promising electrolyte-system with high reversible Mg plating/stripping and excellent stability is essential for rechargeable magnesium batteries (RMBs). Fluoride alkyl magnesium salts (Mg(OR F ) 2 ) not only possess high solubility in ether solvents but also compatible with Mg metal anode, thus holding a vast application prospect. Herein, a series of diverse Mg(OR F ) 2 were synthesized, among them, perfluoro-tert-butanol magnesium (Mg(PFTB) 2 )/AlCl 3 /MgCl 2 based electrolyte demonstrates highest oxidation stability, and promotes the in situ formation of robust solid electrolyte interface. Consequently, the fabricated symmetric cell sustains a long-term cycling over 2000 h, and the asymmetric cell exhibits a stable Coulombic efficiency of 99.5 % over 3000 cycles. Furthermore, the Mg||Mo 6 S 8 full cell maintains a stable cycling over 500 cycles. This work presents guidance for understanding structure–property relationships and electrolyte applications of fluoride alkyl magnesium salts.

关键词： Electrolyte Fluoride Alkyl Magnesium Salts Rechargeable Magnesium Batteries Solid Electrolyte Interface

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PEMFC传输现象三维模拟

PEMFC传输现象三维模拟

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第五届中国智能交通年会暨第六届国际节能与新能源汽车创新发展论坛

作者： ZHAN Zhi-gang 詹志刚 WANG Chen 王谌 PEI Hou-chang 裴后昌 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China 武汉理工大学材料复合新技术国家重点实验室武汉430070

质子交换膜燃料电池中的传热、传质及电化学过程决定着电池的性能，各因素相互影响，传输现象十分复杂。本文基于质量守恒、动量守恒、能量守恒以及Bulter-Volmer等方程，考虑水的相变，对一个5流道3维结构的电池内的传输现象进行模拟... 详细信息

质子交换膜燃料电池中的传热、传质及电化学过程决定着电池的性能，各因素相互影响，传输现象十分复杂。本文基于质量守恒、动量守恒、能量守恒以及Bulter-Volmer等方程，考虑水的相变，对一个5流道3维结构的电池内的传输现象进行模拟，分析了其中传热、传质及电子(质子)传输现象，并对其中的影响因素进行了关联分析；模拟得到的电池性能和实验数据对比，吻合良好。结论对于理解电池内的传输机理、优化电池设计具有指导意义。

关键词：质子交换膜燃料电池传输现象三维模拟关联分析

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Self‐Propelled Micromotors Driven by the Magnesium–Water Reaction and Their Hemolytic Properties†

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Angewandte Chemie 2013年第28期125卷

作者： Fangzhi Mou Chuanrui Chen Huiru Ma Yixia Yin Qingzhi Wu Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 (P.R. China) Department of Chemistry Wuhan University of Technology (P.R. China)

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Hierarchical CdS/m-TiO 2 /G ternary photocatalyst for highly active visible light-induced hydrogen production from water splitting with high stability

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Nano Energy 2018年 47卷 8-17页

作者： Yi Lu Xiu Cheng Ge Tian Heng Zhao Li He Jie Hu Si-Ming Wu Ying Dong Gang-Gang Chang Silvia Lenaerts Stéphane Siffert Gustaaf Van Tendeloo Zhao-Fei Li Ling-Ling Xu Xiao-Yu Yang Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Research Group of Sustainable Energy and Air Purification (DuEL) Department of Bioscience Engineering University of Antwerp Antwerp Belgium Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) – Université Littoral Côte d’Opale 145 Avenue Maurice Schuman 59140 Dunkerque France EMAT (Electron Microscopy for Materials Science) University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgium Petrochemical Research Institute of PetroChina Beijing 102206 China National Center for Magnetic Resonance in Wuhan State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium

Hierarchical semiconductors are the most important photocatalysts, especially for visible light-induced hydrogen production from water splitting. We demonstrate herein a hierarchical electrostatic assembly approach to hierarchical CdS/m-TiO 2 /G ternary photocatalyst, which exhibits high photoactivity and excellent photostability (more than twice the activity of pure CdS while 82% of initial photoactivity remained after 15 recycles during 80 h irradiation). The ternary nanojunction effect of the photocatalyst has been investigated from orbitals hybrid, bonding energy to atom-stress distortion and nano-interface fusion. And a coherent separation mechanism of charge carriers in the ternary system has been proposed at an atomic/nanoscale. This work offers a promising way to inhibit the photocorrosion of CdS and, more importantly, provide new insights for the design of ternary nanostructured photocatalysts with an ideal heterojunction.

关键词： CdS Mesoporous TiO 2 Graphene sheets Ternary photocatalysis Visible light-induced water splitting

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Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films

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Physical Review B 2019年第10期100卷 104109-104109页

作者： M. J. Han E. A. Eliseev A. N. Morozovska Y. L. Zhu Y. L. Tang Y. J. Wang X. W. Guo X. L. Ma Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Wenhua Road 72 110016 Shenyang China University of Chinese Academy of Sciences Yuquan Road 19 100049 Beijing China Institute for Problems of Materials Science National Academy of Sciences of Ukraine Krjijanovskogo 3 03142 Kyiv Ukraine Institute of Physics National Academy of Sciences of Ukraine 46 Prospekt Nauky 03028 Kyiv Ukraine University of Science and Technology of China Jinzhai Road 96 230026 Hefei China State Key Lab of Advanced Processing and Recycling on Non-ferrous Metals Lanzhou University of Technology Langongping Road 287 730050 Lanzhou China

The coupling between antiferrodistortion (AFD) and ferroelectric (FE) polarization, universal for all tilted perovskite multiferroics, is known to strongly correlate with domain wall functionalities in the materials. The intrinsic mechanisms of domain wall phenomena, especially AFD-FE coupling-induced phenomena at the domain walls, have continued to intrigue the scientific and technological communities because of the need to develop future nanoscale electronic devices. Over the past years, theoretical studies have often shown controversial results, owing to the fact that they are neither sufficiently nor directly corroborated with experimental evidence. In this work, the AFD-FE coupling at uncharged 180° and 71° domain walls in BiFeO3 films is investigated by means of aberration-corrected scanning transmission electron microscopy with high-resolution scanning transmission electron microscopy and rationalized by phenomenological Landau-Ginzburg-Devonshire (LGD) theory. We reveal a peculiar morphology at the AFD-FE walls, including kinks, meandering, and trianglelike regions with opposite oxygen displacements and curvature near the interface. The LGD theory confirms that the tilt gradient energy induces these unusual morphologies and the features would change delicately with different kinds of domain walls. Moreover, the 180° AFD-FE walls are proved to be conductive with an unexpected reduction of the Fe-O-Fe bond angle, which is distinct from theoretical predictions. By exploring AFD-FE coupling at the domain walls, and its induced functionalities, we provide exciting evidence into the links between structural distortions and its electronic properties, which provide great benefit for fundamental understanding of domain wall functionalities as well as functional manipulations for novel nanodevices.

关键词： Domain walls Ferroelectricity Atomic force microscopy Transmission electron microscopy

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Addendum: Solution epitaxy of polarization-gradient ferroelectric oxide films with colossal photovoltaic current

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Nature communications 2024年第1期15卷 3878-3878页

作者： Lin, Chen Zhang, Zijun Dai, Zhenbang Wu, Mengjiao Liu, Shi Chen, Jialu Hua, Chenqiang Lu, Yunhao Zhang, Fei Lou, Hongbo Dong, Hongliang Zeng, Qiaoshi Ma, Jing Pi, Xiaodong Zhou, Dikui Wu, Yongjun Tian, He Rappe, Andrew M. Ren, Zhaohui Han, Gaorong State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Center of Electron Microscope School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry University of Pennsylvania Philadelphia PA United States Oden Institute for Computational Engineering and Sciences University of Texas at Austin Austin 78712 TX United States Key Laboratory for Quantum Materials of Zhejiang Province Department of Physics School of Science Westlake University Hangzhou 310024 China Zhejiang Province Key Laboratory of Quantum Technology and Device Department of physics Zhejiang University Hangzhou 310027 China Center for High Pressure Science and Technology Advanced Research 201203 Shanghai China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University 100091 Beijing China Institute of Advanced Semiconductors & Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 311215 China Research Center for Intelligent Sensing Zhejiang Lab Hangzhou 311100 China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

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Preparation and Microstructure of Laminated ZrB2-SiC Ceramics with Porous ZrB2 Interlayers

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Journal of Physics: Conference Series 2013年第1期419卷

作者： H Yuan J Li Q Shen L Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 PR China Beijing Industrial Technology Research Institute Beijing 101111 PR China To whom any correspondence should be addressed

Laminated ZrB2-SiC ceramics with porous ZrB2 interlayers were successfully prepared by Spark plasma Sintering (SPS)/tape casting, laminating and Reactive Spark Plasma Sintering (RSPS). ZrB2-SiC plates were sintered by SPS. And ZrO2-B4C sheets were prepared by tape casting, which will undergo reducing reaction that produces porous ZrB2 interlayers during SSPS processing. The ZrB2-SiC plates and ZrO2-B4C sheets were laminated alternately and reactive sintered to laminated ceramics with porous ZrB2 interlayers. The porosity and thickness of the porous layers were controlled by the tape casting processing and sintering pressure. The microstructure of the laminated ZrB2-SiC ceramics was analysed and discussed in details.

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Preparation and Oxidation of ZrB2/SiC/Zr2Al4C5 Multi-phase Ceramics with Spark Plasma Sintering

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Journal of Physics: Conference Series 2013年第1期419卷

作者： Qilong Guo Junguo Li Zhiyu Ma Ye Nie Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 People's Republic of China Sinoma International Engineering CO. Ltd.(Nanjing) 106 Jiangjun avenue Nanjing Jiangsu 211100 China

The ZrB2/SiC/Zr2Al4C5 multi-phase ceramics were fabricated by spark plasma sintering (SPS) at 1800 °C for 3 min under 20 MPa in an vacuum. Oxidation behavior of multi-phase ceramics were investigated using thermo gravimetric analysis (TGA) from 20 °C to 1500 °C and muffle furnace in stagnant air at 1200 °C. Samples were analyzed after oxidation by X-ray diffraction (XRD), scanning electron microscopy (SEM) along with energy dispersive spectroscopy (EDS) to determine the reaction products and to observe the microstructure. The results showed that the aluminium borate and mullite crystallize on the surface in the samples oxidized. The effect of Zr2Al4C5 content on the oxidation resistance of the ZrB2 ceramics were discussed respectively, and oxidation mechanism was also analysised.

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Correction : The synthesis of size-adjustable superparamagnetism Fe3O4 hollow microspheres

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Discover nano 2024年第1期19卷 163页

作者： Chao Xu Xiaolong Lu Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 People's Republic of China. Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 People's Republic of China. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 People's Republic of China. daihonglian@***. Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 People's Republic of China. daihonglian@***.

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