检索结果-内蒙古大学图书馆

Controllable preparation and microwave absorption properties of shape anisotropic Fe_(3)O_(4) nanobelts

Journal of Materiomics 2021年第5期7卷 957-966页

作者： Jialiang Pan Rujing Zhang Jun Ling Min Wang Zechen Li Zhen Zhen Limin He Hongwei Zhu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China The First Scientific Research Institute of Wuxi Wuxi214035JiangsuChina Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical MaterialsBeijing100095China

To substantially prevent electromagnetic threatens,microwave absorbing materials(MAMs)are required to eliminate surplus electromagnetic *** a typical MAM,Fe_(3)O_(4) particles with complex permittivity and permeability have been widely applied due to the coexistence of magnetic loss and dielectric ***,the necessary high mass fraction significantly limited its applications,thus Fe_(3)O_(4) nanostructures have been extensively investigated to overcome this *** this work,uniform Fe_(3)O_(4) nanobelts were prepared by electrospinning and two-step thermal *** controlling the composition and viscosity of the electrospinning precursor solution,Fe_(3)O_(4) nanobelts with tunable lateral sizes(200 nme1 mm)were *** samples with low content(only 16.7 wt%)Fe_(3)O_(4) exhibited wide maximum effective absorbing bandwidths(EAB)over 3 GHz,and Fe_(3)O_(4) nanobelts with smaller lateral sizes showed a maximum EAB of 4.93 ***,Fe_(3)O_(4) nanobelts with smaller lateral sizes presented superior reflection loss properties,the lowest reflection loss reached-53.93 dB at 10.10 GHz,while the maximum EAB was up to 2.98 *** excellent microwave reflection loss of Fe_(3)O_(4) nanobelts was contributed to the enhanced synergistic effect of magnetic loss,dielectric loss,and impedance matching,originated from the hierarchically cross-linked networks and shape *** study could broaden the practical applications of magnetic absorbers,and provided an approach for the development of shape anisotropic magnetic materials.

关键词： Fe_(3)O_(4) Nanobelts Shape anisotropy Microwave absorption Reflection loss

来源：评论

学校读者我要写书评

暂无评论

Dimensionality-driven in-plane antiferromagnetism in two-dimensional SrRuO3

引用

Physical Review B 2023年第6期107卷 064418-064418页

作者： Mo Zhu Zhangzhang Cui Yingying Zhang Zheling Shan Weiwei Li Qingyou Lu Zhengcao Li Yalin Lu Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science and Engineering University of Science and Technology of China Hefei Anhui 230026 China Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China Hefei Anhui 230026 China State Key Laboratory for New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and Engineering Tsinghua University Beijing 100084 China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory and Hefei Science Center Chinese Academy of Sciences Hefei 230031 China

Control of dimensionality is a powerful tool to unlock hidden electronic and magnetic phases. In particular, reduced dimensionality in strongly correlated oxides leads to an intriguing “dead-layer” behavior that a transition from (ferromagnetic) metal to (antiferromagnetic) insulator occurs as the thickness approaches the two-dimensional limit. However, the origin of such transition has been a subject of debate that both the intrinsic dimensionality effect and the extrinsic disorder effect are proposed to be the driving force. Here, we reveal a transition from ferromagnetic metal with perpendicular magnetic anisotropy to antiferromagnetic insulator with in-plane magnetic anisotropy in SrRuO3 epitaxial films down to the monolayer limit. Experimentally, we demonstrate that SrRuO3 films below 3 unit cells become magnetic insulators and the spin easy axis changes to the in-plane ⟨110⟩ directions. First-principles calculations reveal that the interplay of the orbital-selective quantum confinement on Ru 4d orbitals and the oxygen octahedral rotation drives the ultrathin films from ferromagnetic metal to antiferromagnetic insulator, reorienting Ru spins from the perpendicular to the ⟨110⟩ directions. Our findings demonstrate how reduced dimensionality can tailor the magnetic state and provide significant advances in one of the debated topics in complex oxide heterostructures that dimensionality effect alone can be the driving force of dead-layer phenomenon in two-dimensional systems.

关键词： First-principles calculations Magnetic anisotropy Magnetic order Metal-insulator transition van Hove singularity Complex oxides Heterostructures Thin films

来源：评论

学校读者我要写书评

暂无评论

基于机器学习的Fe/Y协同调控抗氨Pt基HOR催化剂用于高效氢气纯化（英文）

引用

Science China materials 2025年

作者：赵焱申王小青王锐吴芳林段文婧李皓唐浩林 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies School of Biological and Chemical Engineering Zhejiang University of Science and Technology School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Catalonia Institute for Energy Research (IREC) Sant Adrià de Besòs Hubei Key Laboratory of Fuel Cell

开发具有更强氨耐受性的高效电催化剂对于氢电化学氢泵的发展至关重要.本研究利用机器学习和夏普利相加解释法确定了两种具有耐氨潜力的过渡金属Fe和Y.随后,通过使用这两种过渡金属对铂的电子结构进行了调节.在此过程中,Fe凭借其优异的...

开发具有更强氨耐受性的高效电催化剂对于氢电化学氢泵的发展至关重要.本研究利用机器学习和夏普利相加解释法确定了两种具有耐氨潜力的过渡金属Fe和Y.随后,通过使用这两种过渡金属对铂的电子结构进行了调节.在此过程中,Fe凭借其优异的催化能力,促进了PtY合金的形成.这种改性显著减少了氨的吸附,增强了抗氨中毒能力,同时提高了氢氧化反应活性.采用双过渡金属调控的电催化剂（FeY-Pt-C,20%Pt）的质量活性为1071 mA mgPt-1,是Pt-C催化剂（20%Pt）的2.23倍.值得注意的是,即使在5000 ppmNH3的影响下,FeY-Pt-C仍能保持其93.1%的初始电催化活性,显示出卓越的抗氨中毒能力.因此,这项研究为HOR催化剂在氢氨分离领域中的应用提供了见解.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Beating stripe solitons arising from helicoidal spin-orbit coupling in Bose-Einstein condensates

引用

Physical Review E 2025年第4期111卷 044203-044203页

作者： Cui-Cui Ding Qin Zhou B. A. Malomed Research Group of Nonlinear Optical Science and Technology Research Center of Nonlinear Science School of Mathematical and Physical Sciences Wuhan Textile University Wuhan 430200 China State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China Department of Physical Electronics School of Electrical Engineering Faculty of Engineering and the Center for Light-Matter University Tel Aviv University Tel Aviv Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile

We demonstrate that the model of a spatially nonuniform two-component Bose-Einstein condensates (BEC) featuring the helicoidal spin-orbit coupling (SOC), gives rise to dark-bright soliton complexes characterized by spatiotemporal periodic oscillations in each component. These solitons are formed by the superposition of dark and bright ones, and exhibit a beating state over time and a striped state across space, earning them the designation of beating stripe solitons. Our analysis demonstrates that helicoidal SOC significantly affects the formation and dynamical properties of these solitons, also serving as the primary driver for spin oscillations. Through the nonlinear superposition of the beating stripe solitons, a range of intricate scenarios of the interaction between multiple solitons emerges, including head-on collisions, bound states, and parallel states.

关键词： Solitons

来源：评论

学校读者我要写书评

暂无评论

Ultra-High Steep Ion Beam Etching by Employing Highly Dynamic Holder

Ultra-High Steep Ion Beam Etching by Employing Highly Dynami...

引用

China Semiconductor technology International Conference (CSTIC)

作者： Baosheng Du Zeli Wang Simian Zhang Pengcheng Qu Guoxing Liang Weidong Sun Xiaoming Yang Chen Wang Suzhou Youlun Vacuum Equipment Technology Co. Ltd. Suzhou China State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and Engineering Tsinghua University Beijing China Great Wall Navigation Technology Co. Ltd. Beijing China Beijing Zhongkehangxing Technology Co. Ltd. Beijing China Beijing Advanced Innovation Center for Integrated Circuits Beijing China

ISBN: (数字)9798331513351

ISBN: (纸本)9798331513368

For high-quality etching of incredibly small dimensions and complicated structures, it is essential to provide great control over sidewall morphology during the IBE process. This study presents a two-dimensional high precision adjustable motion sample holder and corresponded dynamic etching process for ion beam etching system designed to improve control over sidewall morphology and improve etching uniformity during the etching process. Structural enhancements increase the control accuracy to 0.1°, highly improving incident angle precision. It minimizes surface roughness in nanopatterning and ensures high-quality etching, meeting the strict requirements of sidewall contour control, improving the sidewall angle from 67.8° to 84.7°. The proposed solution significantly enhances etching uniformity for small, complex structures.

关键词： Accuracy Nanopatterning Dynamics Process control Surface morphology Morphology Etching Surface roughness Rough surfaces Ion beams

来源：评论

学校读者我要写书评

暂无评论

Microstructure and Mechanical Properties of Sic-Gnps-Sicw Composites by Oscillatory Pressure Sintering

SSRN

引用

SSRN 2023年

作者： Yang, Yifan Zhu, Tianbin Su, Yuqi Wang, Heng Liang, Xiong Li, Yawei Xie, Zhipeng Han, Yao The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan430081 China National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and Technology Wuhan430081 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Aerospace Institute of Advanced Materials & Processing Technology Beijing100074 China

The preparation of SiC-based ceramics with high densification, high strength and exceptional toughness is still a severe challenge. A new dynamic pressure sintering technique—oscillatory pressure sintering (OPS) was used to prepare SiC ceramics with one-dimensional silicon carbide whiskers (SiCw) and two-dimensional graphene nanoplatelets (GNPs) as reinforcing phases;the microstructure analysis and mechanical properties of such composites were studied. When the contents of GNPs and SiCw were 1 wt% and 5 wt% respectively, the relative density of SiC-based composites reached 99.86%, and their Vickers hardness, flexure strength and fracture toughness were up to 31.55 GPa, 742 MPa and 7.32 MPa·m1/2, respectively. The small grain size and the enhanced interface between the matrix and the reinforcing phase could effectively improve the flexural strength of the composites. The main toughening mechanisms of SiC-based composites were crack deflection and bridging, and the bridging of GNPs and SiCw. Meanwhile, the formation of well-matched coherent interfaces of SiC/GNPS and SiC/SiCw contributed to a synergistic improvement in strength and toughness of SiC-based composites. © 2023, The Authors. All rights reserved.

关键词： Silicon carbide

来源：评论

学校读者我要写书评

暂无评论

Local microenvironment reactive zone engineering promotes water activation

引用

materials Reports: Energy 2025年第2期5卷 1-4,I0001页

作者： Jian Luo Junjie Zheng Mingjie Wu Fang Dong Yuyu Liu Jinli Qiao Yingkui Yang State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China Institut National de la Recherche Scientifique (INRS) Centre Energie Materiaux Telecommunications Varennes QC J3X 1P7 Canada Institute for Sustainable Energy College of Sciences Shanghai University Shanghai 200444 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and Engineering Donghua University Shanghai 201620 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 China

Beyond conventional electrocatalyst engineering, recent studies have demonstrated the effectiveness of manipulating the local reaction environment to enhance the performance of electrocatalytic reactions. The general principles and strategies of local environmental engineering for different electrocatalytic processes have been extensively investigated. This perspective critically appraises the recent advancements in local reaction environment engineering for water activation, aiming to provide a comprehensive assessment of this emerging field.

关键词： Local microenvironment Water activation Oxygen evolution reaction (OER) Hydrogen evolution reaction (HER)

来源：评论

学校读者我要写书评

暂无评论

Major strategies for improving the performance of perovskite solar cells

引用

iEnergy 2023年第3期2卷 172-199页

作者： Lixiu Zhang Hang Li Kai Zhang Wenzhe Li Chuantian Zuo George Omololu Odunmbaku Jingde Chen Cong Chen Luozheng Zhang Ru Li Yuping Gao Baomin Xu Jiangzhao Chen Yongsheng Liu Yang Wang Yanlin Song Jianxin Tang Feng Gao Qing Zhao Yong Peng Mingzhen Liu Lei Tao Yuelong Li Zhimin Fang Ming Cheng Kuan Sun Dewei Zhao Yixin Zhao Shihe Yang Chenyi Yi Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Sichuan UniversityChengdu 610065China School of Energy&Power Engineer-ing Chongqing UniversityChongqing 400044China Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Institute of New Energy Technology Department of Electronic EngineeringCollege of Information Science and TechnologyJinan UniversityGuangzhou 510631China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China College of Chemistry Nankai UniversityTianjin 300071China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelec-tronics School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Photoelectronic Thin Film Devices and Technology Nankai UniversityTianjin 300350China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

Metal halide perovskite solar cell(PSC)has successfully distinguished itself in optoelectronic field by virtue of the sharp rise in power conversion efficiency over the past *** remarkable efficiency breakthrough at such a fast speed can be mainly attributed to the comprehensive study on film deposition techniques,especially the effective management of surface and interfacial defects in recent ***,we summarized the current trends in performance enhancement for PSCs,with a focus on the generally applicable strategies in high-performance works,involving deposition methods,compositional engineering,additive engineering,crystallization manipulation,charge transport material selection,interfacial passivation,optical coupling effect and constructing tandem solar *** directions and perspectives are also provided.

关键词： Perovskite solar cells efficiency improvement strategies milestones

来源：评论

学校读者我要写书评

暂无评论

Interfacial molecular anchor for ambient all-bladed perovskite solar modules

引用

Joule 2025年第5期9卷

作者： Zhu, Xuejie Yu, Dongqi Zhou, Xin Wang, Nan Liu, Hong Liang, Zihui Wu, Congcong Wang, Kai Jin, Dayong Liu, Shengzhong Yang, Dong State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Dalian116023 China School of Physics and Electronic Technology Liaoning Normal University Dalian116029 China Interdisciplinary Research Center for Biology and Chemistry Liaoning Normal University Liaoning Dalian116029 China Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer Materials School of Materials Science and Engineering Hubei University Wuhan430062 China National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430073 China Huanjiang Laboratory Zhejiang University Zhuji311800 China School of Mathematical and Physical Sciences Faculty of Science University of Technology Sydney SydneyNSW Australia Eastern Institute for Advanced Study Eastern Institute of Technology Ningbo China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

Ambient blade coating of perovskite solar modules shows great potential for large-scale manufacture and commercialization. However, blade coating nanometer-thick buffer layers typically results in a nonuniform surface due to particle instability and aggregation, often leading to insufficient integration and destabilization of the crystallographic lattice in the overlying perovskite layer. Herein, we introduce a layer of "molecular glue" that can effectively anchor the solute that suspends the monodisperse SnO2 nanoparticles into a uniform thin film and adhere it to the top perovskite during the mechanical blading process. Leveraging this holistic nanoparticle-anchoring strategy, we have achieved a seamlessly bonded cathode heterojunction, resulting in a record efficiency of 26.11% for small cells and the highest efficiency so far of 22.76% (certified at 21.60%) for mini-modules. Importantly, these ambiently all-blade-coated devices exhibit an extended lifetime of approximately 1,500 h, as verified by ISOS-O testing, indicating great promise for commercialization. © 2025

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Construction of Sunlight-resistant Color and Process Control of Meta-aramid Fiber

Construction of Sunlight-resistant Color and Process Control...

引用

作者： Hong-Hui Xia Xin Chen Dan Sheng Yun-Li Wang Rui-Qing Li Gen-Yang Cao State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University School of Textile and Clothing Jiangnan University

To increase the color fastness to sunlight of dyed meta-aramid,meta-aramid fabrics are dyed with vat dyes with excellent color fastness to *** was achieved through conducting the suspension dyeing method and the leuco-acids dyeing *** effects of dye concentration,thiourea dioxide concentration,reduction temperature,dyeing temperature and dyeing time on dyeing performance were *** dyeing process is as follows:vat dye 60 g/L,thiourea dioxide 5 g/L,reduction was carried out at 60°C,followed by dyeing at 130°C for 60 *** results show that vat dyeing can deal with the issue of poor color fastness to sunlight of meta-aramid fiber,and leuco-acid dyeing with vat dyes can improve meta-aramid fiber color fastness to sunlight,up to 3-4.

关键词： Vat Dyes Meta-aramid Suspensions Leuco-acids Color Fastness to Sunlight

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：