检索结果-内蒙古大学图书馆

Subwavelength resolved terahertz real-time imaging based on a compact and simplified system

Chinese Optics Letters 2022年第9期20卷 14-17页

作者： Zhiyong Tan Wenjian Wan Chang Wang Juncheng Cao Laboratory of Terahertz Solid-state Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

A real-time imaging system based on a compact terahertz laser is constructed by employing one off-axis parabolic mirror and one silicon *** imaging of water,water stains,leaf veins,human hairs,and metal wire is *** imaging resolution of 68μm is *** experiments show that this compact and simplified imaging system is suitable for penetration demonstration of terahertz light,water distribution measurement,and imaging analysis of thin samples.

关键词： terahertz real-time imaging subwavelength resolution compact laser

来源：评论

学校读者我要写书评

暂无评论

Progress and perspective of high strain NBT-based lead-free piezoceramics and multilayer actuators

引用

Journal of Materiomics 2021年第3期7卷 508-544页

作者： Pengyuan Fan Kai Liu Weigang Ma Hua Tan Qi Zhang Ling Zhang Changrong Zhou David Salamon Shan-Tao Zhang Yangjun Zhang Bo Nan Haibo Zhang School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan430074PR China School of Materials Science and Engineering University of New South WalesSydney2052Australia School of Mechanical and Electrical Engineering Shihezi UniversityShiheziChina College of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004PR China Central European Institute of Technology(CEITEC)Brno University of Technology Czech Republic National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringCollege of Engineering and Applied ScienceCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China State Key Laboratory of Automotive Safety and Energy School of Vehicle and MobilityTsinghua UniversityBeijing100084PR China Guangdong HUST Industrial Technology Research Institute Dongguan523808PR China

In this review,the evolution of high strain Na_(0.5)Bi_(0.5)TiO_(3)-based lead-free piezoceramics and their multilayer actuators has been ***,in terms of Na_(0.5)Bi_(0.5)TiO_(3)-based ceramic materials,the origin of high strain,the typical chemical modification methods of obtaining large strain and extrinsic factors affecting the large strain are *** it briefly summarizes the problems existing in Na_(0.5)Bi_(0.5)TiO_(3)-based ceramics for multilayer actuator *** to optimize strain performance by means of microstructure control and phase structure design are also ***,in terms of multilayer actuator,we describe its characteristics,applications and preparation process systematically,as well as the recent development of Na_(0.5)Bi_(0.5)TiO_(3)-based multilayer *** last,perspectives on directions of following work and promising fields for the applications of the materials and their devices are presented.

关键词： Lead-free piezoceramics Bismuth sodium titanate Electric-field-induced strain Multilayer actuators

来源：评论

学校读者我要写书评

暂无评论

Al3+ diffusion-directed assembly of GO-CNTs multi-layered composite coatings: Preparation and tribological performance

引用

Surface and Coatings Technology 2024年 484卷

作者： Zhu, Jinyu Yang, Yawen Ma, Limin Jia, Weihong Hou, Kaiming Li, Zhangpeng Wang, Jinqing Yang, Shengrong State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai264006 China Qingdao Center of Resource Chemistry & New Materials Qingdao266000 China

To resolve graphene coating's typical problems in tribological applications, including poor interfacial bonding, agglomeration, and low wear resistance, a dimensionally composited coating based on graphene oxide (GO) and carbon nanotubes (CNTs) was successfully prepared by a feasible metal-ion diffusion-directed assembly method. Experiments showed that the Al3+ diffusion-directed assembly method could significantly increase the coating interfacial binding strength, elasticity modulus, and hardness. In addition, the synergistic lubrication of GO and CNTs during friction enabled the Al3+-GO-CNTs5.0 coating to sustain a longer operation duration of 12,900 cycles. This study refers to inducing coordination with metal ions in various valence states and compositing carbon-based nanomaterials in different dimensions, which provides a feasible way to improve the lubricating coating's mechanical and tribological performances. © 2024 Elsevier B.V.

关键词： Wear resistance

来源：评论

学校读者我要写书评

暂无评论

Magnetic corner states in a two-dimensional gyromagnetic photonic crystal

引用

Physical Review B 2023年第1期107卷 014105-014105页

作者： Yan-Chen Zhou Hua-Shan Lai Jian-Lan Xie Xiao-Chen Sun Cheng He Yan-Feng Chen National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering Nanjing University Nanjing 210093 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing 210093 China

Recently discovered higher-order states extensively enrich the study of topological phases, allowing one to manipulate wave propagating or localizing in more than one dimension lower than the bulk. To date, vast higher-order topological phases have been demonstrated in photonics, acoustics, mechanics, and electronics; however, these are usually in magnetic-free scenarios. Here, we report our realization of magnetic corner states in a two-dimensional honeycomb lattice gyromagnetic photonic crystal. By simultaneously breaking both time-reversal and parity symmetries with one-sublattice magnetic bias, we elaborately gap the native gapless chiral edge states of the quantum-Hall phase. In the complete band gaps, we experimentally observe a pair of unconventional corner states originating from the hybridization of two Wannier centers to shape symmetrical and antisymmetrical modes. Furthermore, we can switch on (off) the corner field localizations solely by adding (removing) the magnetic fields of the corner sites without changing other configurations.

关键词： Magneto-optics Topological effects in photonic systems Topological materials

来源：评论

学校读者我要写书评

暂无评论

Extraterrestrial artificial photosynthetic materials for in-situ resource utilization

引用

National science Review 2021年第8期8卷 108-133页

作者： Liuqing Yang Ce Zhang Xiwen Yu Yingfang Yao Zhaosheng Li Congping Wu Wei Yao Zhigang Zou Eco-Materials and Renewable Energy Research Center(ERERC) Jiangsu Key Laboratory for Nano TechnologyNational Laboratory of Solid State MicrostructuresSchool of PhysicsNanjing University Collaborative Innovation Center of Advanced Microstructures College of Engineering and Applied SciencesNanjing University Kunshan Innovation Institute of Nanjing University Macau Institute of Systems Engineering Macau University of Science and Technology School of Science and Engineering The Chinese University of Hong Kong Qian Xuesen Laboratory of Space Technology China Academy of Space Technology Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

Aerospace milestones in human history, including returning to the moon and manned Martian missions,have been implemented in recent years. Space exploration has become one of the global common goals, and to ensure the survival and development of human beings in the extraterrestrial extreme environment has been becoming the basic ability and technology of manned space exploration. For the purpose of fulfilling the goal of extraterrestrial survival, researchers in Nanjing University and the China Academy of Space Technology proposed extraterrestrial artificial photosynthesis(EAP) technology. By simulating the natural photosynthesis of green plants on the Earth, EAP converts CO/HO into fuel and Oin an in-situ,accelerated and controllable manner by using waste COin the confined space of spacecraft, or abundant COresources in extraterrestrial celestial environments, e.g. Mars. Thus, the material loading of manned spacecraft can be greatly reduced to support affordable and sustainable deep space exploration. In this paper, EAP technology is compared with existing methods of converting CO/HO into fuel and Oin the aerospace field, especially the Sabatier method and Bosch reduction method. The research progress of possible EAP materials for in-situ utilization of extraterrestrial resources are also discussed in depth. Finally,this review lists the challenges that the EAP process may encounter, which need to be focused on for future implementation and application. We expect to deepen the understanding of artificial photosynthetic materials and technologies, and aim to strongly support the development of manned spaceflight.

关键词： solar energy extraterrestrial survival artificial photosynthesis CO2 reduction oxygen evolution

来源：评论

学校读者我要写书评

暂无评论

Large enhancement of properties in strained lead-free multiferroic solid solutions with strong deviation from Vegard's law

引用

Matter 2025年第1期8卷

作者： Wang, Tao Zou, Min-Jie Zhang, Dehe Ku, Yu-Chieh Zheng, Yawen Pan, Shen Ren, Zhongqi Xu, Zedong Huang, Haoliang Luo, Wei Tang, Yunlong Chen, Lang Liu, Cheng-En Chang, Chun-Fu Das, Sujit Bellaiche, Laurent Yang, Yurong Ma, Xiu-Liang Kuo, Chang-Yang Liu, Xingjun Chen, Zuhuang State Key Laboratory of Advanced Welding and Joining of Materials and Structures School of Materials Science and Engineering Harbin Institute of Technology Shenzhen518055 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Wenhua Road 72 Shenyang110016 China National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures Department of Materials Science and Engineering Nanjing University Nanjing210093 China Department of Electrophysics National Yang Ming Chiao Tung University Taiwan Hsinchu30010 Taiwan Department of Physics Southern University of Science and Technology Shenzhen518055 China Shenzhen518045 China Smart Ferroic Materials Center Physics Department and Institute for Nanoscience and Engineering University of Arkansas FayettevilleAR72701 United States School of Materials Science and Engineering University of Science and Technology of China Wenhua Road 72 Shenyang110016 China Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 Dresden01187 Germany Materials Research Centre Indian Institute of Science Bangalore560012 India Department of Materials Science and Engineering Tel Aviv University Tel Aviv Ramat Aviv6997801 Israel National Synchrotron Radiation Research Center 101 Hsin-Ann Road Taiwan Hsinchu30076 Taiwan

Efforts to combine the advantages of multiple systems to enhance functionalities through solid-solution design present a great challenge due to the constraint imposed by the classical Vegard's law. Here, we successfully navigate this trade-off by leveraging the synergistic effect of chemical doping and strain engineering in the solid-solution system of (1-x)BiFeO3-xBaTiO3. Unlike bulks, a significant deviation from Vegard's law accompanied by enhanced multiferroism is observed in strained solid-solution epitaxial films, where we achieve a pronounced tetragonality (∼1.1), enhanced saturated magnetization (∼12 emu/cm3), substantial polarization (∼107 μC/cm2), and high ferroelectric Curie temperature (∼880°C), all while maintaining impressively low leakage current. These characteristics surpass the properties of their parent BiFeO3 and BaTiO3 films. Moreover, the superior ferroelectricity has never been reported in corresponding bulks (e.g., P ∼5 μC/cm2 and TC ∼300°C for bulk, with x = 0.5). These findings underscore the potential of strained (1-x)BiFeO3-xBaTiO3 films as lead-free, room temperature multiferroics. © 2024 Elsevier Inc.

关键词： Ferroelectricity

来源：评论

学校读者我要写书评

暂无评论

Towards Wearable Multifunctional Cellulose Nanofiber/Silver Nanowire/ Graphene Oxide Film: Electromagnetic Protection, Antibacterial, and Motion Monitoring

SSRN

引用

SSRN 2024年

作者： Jia, Hui Wang, Zheng Yang, Xiao Wang, Hao Xie, Lijing Tao, Zechao Kong, Qingqiang Zhang, Shou-Chun Jiang, Dong Chen, Cheng-Meng CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan030001 China University of Chinese Academy of Sciences Beijing100049 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China School of Electronic Science and Engineering Fujian Engineering Research Center for Solid‐State Lighting Xiamen University Xiamen361005 China

Strong electromagnetic radiation has seriously threatened human body health due to the rapid development of 5G electronic devices towards millimeter wave (mmwave) and broadband. The demand for wearable and multifunctional materials with high-performance electromagnetic protection is very urgent. Here, a wearable and multifunctional cellulose nanofiber/silver nanowire/graphene oxide (CNF-Ag NWs/GO) hybrid film with a sandwich structure is successfully fabricated by a convenient dip-coating method. Such a structure is constituted by a flexible CNF substrate and electromagnetic shielding blocks of Ag NWs and encapsulation units of GO. Benefiting from the packaging of GO sheets by the hydrogen bond interaction, a dense Ag NWs conductive network is woven. The resulting film shows extremely low sheet resistance of 13.75 Ω/ and superior electromagnetic shielding performance of 47.6 dB in the mmwave range (26-40 GHz). Meanwhile, an excellent antibacterial property and a motion monitoring ability with high sensitivity are also acquired. The work realizes a multi-functional integration and provides new insight into the development of wearable electromagnetic protection materials. © 2024, The Authors. All rights reserved.

关键词： Electromagnetic shielding

来源：评论

学校读者我要写书评

暂无评论

CsPbBr3 perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication

引用

Photonics Research 2021年第12期9卷 2341-2350页

作者： KONTHOUJAM JAMES SINGH XIAOTONG FAN ANNADA SANKAR SADHU CHUN-HO LIN FANG-JYUN LIOU TINGZHU WU YU-JUNG LU JR-HAU HE ZHONG CHEN TOM WU HAO-CHUNG KUO Department of Photonics&Institute of Electro-Optical Engineering College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan International Ph.D.Program in Photonics(UST) College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan Department of Electronic Science Fujian Engineering Research Center for Solid-State LightingXiamen UniversityXiamen 361005China School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia Research Center for Applied Sciences Academia SinicaTaipei 11529Taiwan Department of Materials Science and Engineering City University of Hong KongKowloon TongHong KongChina

We propose a flexible white-light system for high-speed visible-light communication(VLC)applications,which consists of a semipolar blue InGaN/GaN single-quantum-well micro-light-emitting diode(LED)on a flexible substrate pumping green CsPbBr3 perovskite quantum-dot(PQD)paper in nanostructure form and red CdSe QD *** highest bandwidth for CsPbBr3 PQD paper,229 MHz,is achieved with a blue micro-LED pumping source and a high data transmission rate of 400 Mbps;this is very promising for VLC *** 817 MHz maximum bandwidth and a 1.5 Gbps transmission speed are attained by the proposed semipolar blue *** proposed flexible white light system and the high-bandwidth PQD paper could pave the way for VLC wearable devices.

关键词： pumping communication quantum

来源：评论

学校读者我要写书评

暂无评论

Integrated low-cost and low-loss spot size converter for thin film lithium niobate 13

Integrated low-cost and low-loss spot size converter for thi...

引用

Optoelectronic Devices and Integration XIII 2024

作者： Yi, Zhaozheng Wang, Mingjin Liu, Wenzhen Zhou, Shengmin Si, Jiahao Tang, Chenyan Xin, Dongxu Zheng, Wanhua Laboratory of Solid State Optoelectronics Information Technology Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China College of Future Technology University of Chinese Academy of Sciences Beijing101408 China

ISBN: (纸本)9781510682009

An integrated low-cost and low-loss spot size converter (SSC) for thin film lithium niobate (TFLN) is important to support various high-performance hetero-integrated devices, such as electro-optic modulators, optical frequency combs, and optical phased array. The high performance and power consumption restrict the development of hetero-integrated devices consisting of silicon on insulator and lithium niobate, because of a large difference in mode field sizes between TFLN waveguides and standard single mode fibers or semiconductor lasers. Up to now, most low-loss SSCs whose feature sizes range from tens to hundreds of nanometers, are fabricated by high-cost electron beam lithography. Here we theoretically propose an integrated low-cost and low-loss SSC that reduces the end-face coupling losses in integrated system and improve the coupling efficiency, meanwhile especially its feature size of 1 μm can be fabricated by standard lithography. Based on evanescent wave coupling theory, a Si3N4 tapered waveguide surrounded by an amorphous silicon thin layer is used to enhance evanescent wave coupling strength, thereby achieving a high coupling efficiency of 88% between the TFLN and semiconductor lasers. The low-cost and low-loss SSC provides a potential method for hetero-integrated TFLN devices. © 2024 SPIE. All rights reserved.

关键词： Single mode fibers

来源：评论

学校读者我要写书评

暂无评论

In situ synergistic strategy of sacrificial intermedium for scalablemanufactured and controllable layered double hydroxide film

引用

science China materials 2022年第7期65卷 1842-1852页

作者： Yi-Xing Zhu Guang-Ling Song Da-Jiang Zheng Maria Serdechnova Carsten Blawert Mikhail L.Zheludkevich Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China Institute of Surface Science Helmholtz-Zentrum HereonMax-Planck Strasse 121502 GeesthachtGermany State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQueensland 4072Australia Institute of Materials Science Faculty of EngineeringKiel UniversityKiel 24143Germany

Layered double hydroxides(LDHs),a class of two-dimensional(2D)brucite-like layers,have been effectively applied in diverse ***,the current synthesis methods restrict the in situ scaling-up and tunable production of LDH-based *** by the growing characteristic of“Bryophyllum pinnatum”,a sacrificial co-sputtered Zn-Al transition layer was introduced for the first time to in situ grow a scalable-manufactured and thickness-controllable LDH film on arbitrary substrate materials with flexible shapes through“partial dissolution”and“solution infiltration”*** LDH films could be tailored by the creative regulation of the component,structure and surface state of the transition *** showed that the as-prepared LDH film had strong mechanical robustness under harsh abrasion conditions due to its large thickness and multi-level ***,a series of galvanic couple model experiments based on Zn/Al single-metal transition layers were designed to solve the real-time monitoring issue in the complex hydrothermal *** work not only develops a new strategy to design and grow in situ LDH films with multifaceted features,but also reveals sophisticated LDH formation ***,the findings of this study may broaden the practical application of LDH-based materials toward advanced and smart devices.

关键词： sacrificial transition layer Zn-Al LDH film conversion mechanism solution infiltration controllable growth

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：