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Metamaterials:From Engineered materials to engineering materials

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engineering 2022年第10期17卷 1-2页

作者： John Pendry Ji Zhou Jingbo Sun Department of Physics Imperial College LondonLondon SW72AZUK School of materials Science and engineering Tsinghua UniversityBeijing 100084China

As a new frontier in materials science,metamaterials have experienced a boom in the past two *** research field began with artificially structured materials exhibiting extraordinary electromagnetic properties unavailable in nature;now,it extends to a large family of artificial-material systems with wide-ranging,extraordinary,and outstanding properties for applications in fields such as electromagnetics,optics,mechanics.

关键词： Engine frontier optics

Wood-inspired engineering materials

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Science China materials 2018年第12期61卷 1625-1626页

作者： Lennart Bergstrom Department of materials and Environmental Chemistry Stockholm UniversityStockholm 10691Sweden

Nature continues to serve as inspiration for the design and fabrication of high-performance materials [1,2].The structural and compositional features responsible for e.g. the high hardness and fracture toughness of nacre,tooth enamel and other biominerals have served as a bench- mark for the structural design of hard and strong materials [3].Wood has been utilized by humankind for millennia for protection,construction,energy and for cultural and religious *** hierarchical and cellular structure of wood and the structure-property rela- tions of the constituents and their assemblies:e.g. cellulose,hemicellulose and lignin,has been the focus of intense research efforts and resulted in advances in the fabrication of wood-based functional and structural high- performance materials [4,5].

关键词： CMF CPF Wood-inspired engineering materials

The Study of the Antimicrobial Properties of Selected engineering materials’ Surfaces

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Journal of Minerals and materials Characterization and engineering 2014年第2期2卷 78-87页

作者： Olawale Samuel Fatoba David Ehigie Esezobor Olaitan Lukman Akanji Abiodun Joseph Fatoba Damilola Macgregor John Etubor Deparment of Cell Biology and Genetics University of Lagos Lagos Nigeria Department of Chemical Metallurgical and Materials Engineering Tshwane University of Technology Pretoria South Africa Department of Metallurgical and materials engineering University of Lagos Lagos Nigeria

This paper studies the antimicrobial activity of selected engineering materials surfaces at room and chill temperatures. The antimicrobial effects of selected materials surfaces were evaluated by dropping the test pieces into prepared cultures of Bacillus spp, Escherichia coli, and Staphylococcus aereus isolated from fruits, animal feaces and natural environment respectively. Bacteria count obtained after 0, 30, 60, 90, 120, 180, 240 and 300 minutes at room temperature and chill condition was taken and compared with their initial count. The amount of live bacteria drops by several orders of magnitude, to zero, on metallic copper and brass within 30 to 300 minutes in both room and chill conditions. In contrast, no reduction is seen in the number of colonies of live bacteria on plastics, ceramic and stainless steel in both room and chill conditions. These results suggest that the selection of metallic copper and brass for touch surfaces in hospitals, surfaces exposed to fruit processing and household utensils can materially assist in reducing bacterial contamination, which should lead to a reduction in the transmission of infectious organisms.

关键词： Antimicrobial Material Surfaces Temperature Bacteria Environment

Frost-heaving pressure in geotechnical engineering materials during freezing process

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International Journal of Mining Science and Technology 2018年第2期28卷 287-296页

作者： Wang Pingsheng Zhou Guoqing State Key Laboratory for Geomechanics and Deep Underground engineering China University of Mining and Technology Department of Civil engineering Monash University

Energy and resources including coal, oil, and gas are in demand all over the world. Because these resources near the earth's surface have been exploited for many years, the extraction depth has *** mining shafts in the coal extraction process become deeper, especially in western China, an artificial freezing method is used and is concentrated in the fractured rock mass. The frost-heaving pressure(FHP)is directly related to the degree of damage of the fractured rock mass. This paper is focused on FHP during the freezing process, with emphasis on the frost-heaving phenomenon in engineering materials. A review of the frost phenomenon in the geotechnical engineering literature indicates that:(1) During the soil freezing process, the ice content that is influenced by unfrozen water and the freezing rate are the determining factors of FHP;(2) During the freezing process of rock and other porous media, the resulting cracks should be considered because the FHP may damage the crack structure;(3) The FHP in a joint rock mass is analyzed by the joint deformation in field and experimental tests and can be simulated by the equivalent expansion method including water migration and joint deformation.

关键词： Frost heaving pressure Fractured rock Low temperature Freezing process Water and ice content

Self-regulation in chemical and bio-engineering materials for intelligent systems

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CAAI Transactions on Intelligence Technology 2018年第1期3卷 40-48页

作者： Zhongyuan Huang Kewei Lei Dan He Yanbin Xu Jacob Williams Liu Hu Macy McNeil Juan M. Ruso Zhen Liu Zhanhu Guo Zhe Wang Chemistry Department Xavier University of Louisiana New Orleans LA 70125 USA College of Chemistry and Chemical engineering Xinyang Normal University Xinyang 464000 Henan People's Republic of China materials Science and Chemical engineering Ningbo University Ningbo 315211 People's Republic of China Department of Pharmaceutical Analysis Chongqing Medical University Chongqing 400016 People's Republic of China School of Chemistry and materials Science Ludong University Yantai 264025 Shandong People's Republic of China Department of Physics and engineering Frostburg State University Frostburg MD 21532 USA Department of Mechanical engineering University of Maryland College Park MD 20742 USA Integrated Composites Laboratory (ICL) Department of Chemical & Biomolecular Engineering University of Tennessee KnoxvilleTN 37996 USA National engineering Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou 450002People's Republic of China Soft Matter and Molecular Biophysics Group Department of Applied Physics University of Santiago de Compostela15782 Santiago de Compostela Spain

Herein, the authors review the self-regulation system secured by well-designed hybrid materials, composites, and complex system. As a broad concept, the self-regulated material/system has been defined in a wide research field and proven to be of great interest for use in a biomedical system, mechanical system, physical system, as the fact of something such as an organisation regulating itself without intervention from external perturbation. Here, they focus on the most recent discoveries of self-regulation phenomenon and progress in utilising the self-regulation design. This paper concludes by examining various practical applications of the remarkable materials and systems including manipulation of the oil/water interface, cell out-layer structure, radical activity, electron energy level, and mechanical structure of nanomaterials. From material science to bioengineering, self-regulation proves to be not only viable, but increasingly useful in many applications. As part of intelligent engineering, self-regulatory materials are expected to be more used as integrated intelligent components.

关键词：复合材料纳米技术智能技术人工智能

Silicon-processes-compatible contact engineering for twodimensional materials integrated circuits

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Nano Research 2023年第11期16卷 12471-12490页

作者： Li Gao Zhangyi Chen Chao Chen Xiankun Zhang Zheng Zhang Yue Zhang Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China School of materials Science and engineering Peking UniversityBeijing 100871China Key Laboratory of Advanced materials and Devices for Post-Moore Chips Ministry of EducationUniversity of Science and Technology BeijingBeijing 100083China

Two-dimensional(2D)semiconductors,especially transition metal dichalcogenides(TMDCs),have been proven to be excellent channel materials for the next-generation integrated circuit(IC).However,the contact problem between 2D TMDCs and metal electrodes has always been one of the main factors restricting their *** this review,we summarized recent work on 2D TMDCs contact from the perspective of compatible integration with silicon processes and practical application requirements,including the contact performance evaluation indicators,special challenges encountered in 2D TMDCs,and recent optimization ***,we sorted out and highlighted the performance indicators of 2D TMDCs contacts,including contact resistance(RC),contact scaling,contact stability,and contact electrical/thermal *** challenges of 2D TMDCs and metal contact,such as severe Fermi level pinning,large RC,and difficult doping,are systematically ***,typical methods for optimizing 2D TMDCs RC,edge contact strategies for scaling contact lengths,and solutions for improving contact stability are *** on the current research and problems,the development direction of 2D TMDCs contacts that meet the silicon-based compatible process and application performance requirements is proposed.

关键词： two-dimensional(2D)semiconductors transition metal dichalcogenides field effect transistors contact engineering

Morphological engineering of Sensing materials for Flexible Pressure Sensors and Artificial Intelligence Applications

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Nano-Micro Letters 2022年第9期14卷 1-48页

作者： Zhengya Shi Lingxian Meng Xinlei Shi Hongpeng Li Juzhong Zhang Qingqing Sun Xuying Liu Jinzhou Chen Shuiren Liu School of materials Science and engineering Henan Key Laboratory of Advanced Nylon Materials and ApplicationHenan Innovation Center for Functional Polymer Membrane MaterialsZhengzhou UniversityZhengzhou 450001People’s Republic of China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 352001People’s Republic of China School of Mechanical engineering Yangzhou UniversityYangzhou 225127People’s Republic of China

As an indispensable branch of wearable electronics,flexible pressure sensors are gaining tremendous attention due to their extensive applications in health monitoring,human-machine interaction,artificial intelligence,the internet of things,and other *** recent years,highly flexible and wearable pressure sensors have been developed using various materials/structures and transduction *** engineering of sensing materials at the nanometer and micrometer scales is crucial to obtaining superior sensor *** review focuses on the rapid development of morphological engineering technologies for flexible pressure *** discuss different architectures and morphological designs of sensing materials to achieve high performance,including high sensitivity,broad working range,stable sensing,low hysteresis,high transparency,and directional or selective ***,the general fabrication techniques are summarized,including self-assembly,patterning,and auxiliary synthesis ***,we present the emerging applications of high-performing microengineered pressure sensors in healthcare,smart homes,digital sports,security monitoring,and machine learning-enabled computational sensing ***,the potential challenges and prospects for the future developments of pressure sensors are discussed comprehensively.

关键词： Flexible pressure sensor Morphological engineering Sensing performance Manufacturing technique Artificial intelligence

Artificial interphase engineering of electrode materials to improve the overall performance of lithium-ion batteries

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Nano Research 2017年第12期10卷 4115-4138页

作者： Zhiqiang Zhu Xiaodong Chen Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University SONanyang Avenue 639798 Singapore

The overall performance of lithium-ion batteries （LIBs） is closely related to the interphase between the electrode materials and electrolytes. During LIB operation, electrolytes may decompose on the surface of electrode materials, forming a solid electrolyte interphase （SEI） layer. Ideally, the SEI layer should ensure reversible lithium-ion intercalation in the electrodes and suppress interfacial interactions. However, the chemical and mechanical stabilities of the SEI layer are not usually able to meet these requirements. Alternatively, tremendous efforts have been devoted to engineering the surface of electrode materials with an artificial interphase, which shows great promise in improving the electrochemical performance. Herein, we present a comprehensive summary of the state-of-the-art knowledge on this topic. The effects of the arrifidal interphase on the electrochemical performance of the electrode materials are discussed in detail. In particular, we highlight the importance of three functions of artificial interphases, including inhibiting electrolyte decomposition, protecting the electrodes from corrosion, and accommodatinz electrode volume chanzes.

关键词： artifidal interphase solid electrolyte interphase electrode materials lithium-ion batteries

Preface to special issue on“engineering Nanostructured materials for Advanced Energy and Environmental Catalysis”

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Frontiers of Chemical Science and engineering 2023年第11期17卷 1621-1622页

作者： Zhong-Yong Yuan Xiaoyu Yang Xinying Liu School of materials Science and engineering Nankai UniversityTianjin 300350China School of materials Science and engineering Wuhan University of TechnologyWuhan 430070China Institute for Development of Energy for African Sustainability University of South AfricaJohannesburg 1710South Africa

Sustainability in environment and energy is the watchword of the 21st *** excessive growth in fossil energy consumption and the ensuing acceleration of global climate change as well as related air and water pollution have attracted great attention,on the view of national security *** sustainability has recently emerged as an energy policy issue,requiring the rapid development of science and technology to achieve the goal of carbon peaking and carbon *** sustainability challenges faced by the world are complex and involve multiple interdependent *** utilization of green energy has been required to attempt to change the current energy and environment *** the rapid progress in advanced nanotechnologies,nanostructures and corresponding nanomaterials start to play a vital role in solving critical problems,particularly in energy and environmental ***,advanced materials and green catalysis are being more and more important in solving the energy and environmental *** as building units have brought a unique opportunity for advancing science and technology to create updated products meeting the global demands of environmental remediation and sustainable energy development.

关键词： globally neutral catalysis