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Revealing the atomic mechanism of diamond–iron interfacial reaction

Carbon Energy 2024年第3期6卷 255-263页

作者： Yalun Ku Kun Xu Longbin Yan Kuikui Zhang Dongsheng Song Xing Li Shunfang Li Shaobo Cheng Chongxin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhouChina Department of Mechanical Engineering Stanford UniversityStanfordCaliforniaUSA Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefeiChina Institute of Quantum Materials and Physics Henan Academy of SciencesZhengzhouChina

Diamond,with ultrahigh hardness,high wear resistance,high thermal conductivity,and so forth,has attracted worldwide ***,researchers found emergent reactions at the interfaces between diamond and ferrous materials,which significantly affects the performance of diamond-based ***,combing experiments and theoretical calculations,taking diamond–iron(Fe)interface as a prototype,the counter-diffusion mechanism of Fe/carbon atoms has been ***,it is identified that Fe and diamond first form a coherent interface,and then Fe atoms diffuse into diamond and prefer the carbon vacancies ***,the relaxed carbon atoms diffuse into the Fe lattice,forming Fe_(3)***,graphite is observed at the Fe_(3)C surface when Fe_(3)C is over-saturated by carbon *** present findings are expected to offer new insights into the atomic mechanism for diamondferrous material's interfacial reactions,benefiting diamond-based device applications.

关键词： coherent interface counter-diffusion diamond iron phase transition

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Creation of three-dimensional composite architectures via high-intensity focused ultrasound inside of foams

RSC Applied Polymers

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RSC Applied Polymers 2024年第4期2卷 692-700页

作者： Lee, Chang-Uk Cui, Jianxun Tewani, Hridyesh R. Prabhakar, Pavana Boydston, Andrew J. Department of Chemistry University of Wisconsin Madison 53706 WI United States Department of Mechanical Engineering University of Wisconsin Madison 53706 WI United States Department of Civil and Environmental Engineering University of Wisconsin Madison 53706 WI United States Department of Chemical and Biological Engineering University of Wisconsin Madison 53706 WI United States Department of Materials Science and Engineering University of Wisconsin Madison 53706 WI United States

Free-form creation of 3-dimensional (3D) structures, such as in additive manufacturing (AM) and 3D printing (3DP), typically requires a direct line-of-sight or physical contact between an energy source and a build material. By stepping away from this equipment paradigm, we discovered a method to achieve 3D composites inside of opaque, open-cell foams that enables unprecedented access to bicontinuous, interlocked composite structures. We found that high-intensity focused ultrasound (HIFU) provided efficient, localized heating at a focal point that could be spatially controlled within a foam matrix. Foam specimens were infused with thermally curable acrylate resin formulations, which enabled free-form creation of 3D structures as the HIFU focal point was moved throughout the interior of the foam. The 3D structure was created entirely based upon the toolpath, without any build plate or inherently sequenced layer-by-layer processes. Since the foam and cured resin were mechanically interlocked in the process, HIFU curing achieved bicontinuous composites seemingly independent of surface compatibilities between the foam and resin. Starting with commercially available polyurethane foams, we investigated combinations with different resin systems to achieve a range of mechanical properties from the final composite structures. For example, using poly(ethylene glycol) diacrylate (PEGDA) resulted in stiff, hard composite domains within the foam, whereas resins comprising 2-hydroxyethyl acrylate (HEA) led to soft, elastomeric composite structures. Multimaterial composites were also achieved, simply by displacing uncured resin from the foam and exchanging it with a different resin formulation. Control over the shape and orientation of internal structural features within the foam scaffolds also enabled controllable anisotropic mechanical responses from the composites. © 2024 RSC.

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MXenes for Various Applications:Recent Trends and Future Aspects

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SmartMat 2025年第2期6卷 94-136页

作者： Iftikhar Hussain Riffat Amna BKalidasan Gokana Mohana Rani Hari Bandi Sada Venkateswarlu Shahid Ali Khan Debananda Mohapatra Kaili Zhang Department of Mechanical Engineering City University of Hong KongHong KongChina Department of Civil and Environmental Engineering Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Research Centre for Nanomaterials and Energy Technology(RCNMET) Faculty of Engineering and TechnologySunway UniversityDarul EhsanSelangorMalaysia Department of Biological Sciences and Bioengineering NanoBio High-Tech Materials Research CenterInha UniversityIncheonRepublic of Korea Department of Electronics and Information Convergence Engineering Institute for Wearable Convergence ElectronicsKyung Hee UniversityYonginRepublic of Korea Nanotechnology Centre Centre for Energy and Environmental Technologies(CEET)VSB–Technical University of OstravaOstrava-PorubaCzech Republic Graduate School of Semiconductor Materials and Devices Engineering Ulsan National Institute of Science and Technology(UNIST)UlsanRepublic of Korea

Two-dimensional(2D)MXene structure,versatile surface reactivity,flexibility,wearability,and outstanding thermal attributes make them highly suitable for numerous *** comprehensive review based on MXenes delves into the potential uses of fewer assessed applications,such as materials,solar thermal desalination,energy harvesting,electrochemical sensing,environmental remediation,and removal of heavy metal *** industries associated with the summarized applications include hybrid photovoltaic thermal systems,energy storage,energy conversion,soft electronics,and other ***,the review underscores the importance and future guidance of continued research in the MXene field to harness the potential benefits of not only summarized applications but also diverse applications.

关键词： electrochemical sensing energy harvesting environmental remediation MXene:phase change materials removal of heavy metal ions solar thermal desalination

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Deep Style Transfer for Generation of Photo-realistic Synthetic Images of CNT Forests

Deep Style Transfer for Generation of Photo-realistic Synthe...

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2023 IEEE Applied Imagery Pattern Recognition Workshop, AIPR 2023

作者： Kotha, Prashanth Reddy Attari, Minasadat Maschmann, Matthew Bunyak, Filiz University of Missouri Department of Electrical Engineering and Computer Science ColumbiaMO United States University of Missouri Department of Mechanical and Aerospace Engineering ColumbiaMO United States University of Missouri MU Materials Science and Engineering Institute ColumbiaMO United States

ISBN: (纸本)9798350359527

Carbon nanotubes (CNTs) are promising nano-materials with diverse applications in various fields, ranging from electronics and energy storage to biomedical applications. Characterization of CNT forest structures and prediction of material properties through image analytics are critical for new material design and discovery. Artificial intelligence and machine learning (AI/ML) driven approaches offer promising solutions towards these goals. These data-driven approaches rely on large amounts of annotated data for robust training. However, growing, imaging, and annotation of CNT forests are complex, time consuming, expensive processes limiting availability of such data. In this paper, we propose a novel neural style transfer pipeline to generate photo-realistic and structure-Aware synthetic images of CNT forests by imposing scanning electron microscopy (SEM) like appearance to physics-based simulation results. The proposed pipeline relies on a novel wavelet-based style transfer network and a selective decision fusion mechanism that allows better preservation of the thin curvilinear structures of CNTs, particularly their intricate details and connectivity, without introducing unwanted artifacts. Experimental results and quantitative analysis demonstrate refined style transfer that generates photo-realistic images that can be used to train AI/ML-driven CNT forest image analysis systems. © 2023 IEEE.

关键词： Carbon nanotubes

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Enhanced breakdown strength and energy storage density of AgNbO_(3)ceramics via tape casting

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Rare Metals 2023年第2期42卷 495-502页

作者： Ming-Yuan Zhao Jing Wang Lin Chen Hao Yuan Mao-Hua Zhang Su-Wei Zhang Lei Zhao Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province College of Physics Science and TechnologyHebei UniversityBaoding071002China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China Department of Materials and Earth Sciences Nonmetallic Inorganic MaterialsTechnical University of DarmstadtDarmstadt64287Germany State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Antiferroelectric materials are promising candidates for energy-storage applications due to their double hysteresis loops,which can deliver high power *** the antiferroelectric materials,AgNbO_(3)is proved attractive due to its environmental-friendliness and high potential for achieving excellent energy storage ***,the recoverable energy storage density of AgNbO_(3)ceramics is limited by their relatively low breakdown ***,the breakdown strength of the pure AgNbO_(3)ceramics prepared using the tape casting method is enhanced to 307 kV·cm^(-1),which is,to the best of our knowledge,among the highest values reported for pure AgNbO-3bulk *** high breakdown strength may be due to its dense microstructure and good crystallinity obtained by the tape casting method and the optimized sintering *** to its enhanced breakdown strength,AgNbO_(3)ceramics show high recoverable energy storage density of 2.8 J·cm^(-3).These results have led to the development of lead-free antiferroelectric materials and devices with high energy storage density.

关键词： AgNbO_(3) Energy storage performance Antiferroelectric Tape casting

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Advances in powder nano-photocatalysts as pollutant removal and as emerging contaminants in water:Analysis of pros and cons on health and environment

Advanced Powder Materials

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Advanced Powder materials 2024年第6期3卷 33-69页

作者： Sahil Thakur Abhijeet Ojha Sushil Kumar Kansal Navneet Kumar Gupta Hendrik C.Swart Junghyun Cho Andrej Kuznetsov Shuhui Sun Jai Prakash Department of Chemistry National Institute of Technology HamirpurHamirpur(H.P.)177005India Department of Materials Science and Engineering National Institute of Technology HamirpurHamirpur(H.P.)177005India Dr.S.S.Bhatnagar University Institute of Chemical Engineering and Technology Panjab UniversityChandigarh 160014India Center for Sustainable Technologies Indian Institute of Science(IISc)Gulmohar MargMathikereBengaluru 560012India Department of Physics University of the Free State(UFS)BloemfonteinZA 9300South Africa Department of Mechanical Engineering&Materials Science and Engineering Program State University of New York(SUNY)BinghamtonNY 13902-6000USA University of Oslo Department of Physics and Centre for Materials Science and NanotechnologyPO Box 1048 BlindernN-0316OsloNorway Institut National de la Recherche Scientifique(INRS)-CentreEnergie Materiaux et Telecommunications VarennesQuebec J3X 1P7Canada

Photocatalysis is an advanced oxidation process where light exposure triggers a semiconducting nanomaterial(nano-photocatalyst)to generate electron-hole(e^(-)/h^(+))pairs and free *** phenomenon is widely used for the photocatalysis-assisted removal of organic and other contaminants using wide range of nanophotocatalysts,offering an efficient approach to environmental ***,the introduction of powdered nano-photocatalysts into water systems often leads to unintended secondary pollution in the form of residual nano-photocatalysts,ion leaching,free radicals,toxic by-products *** practices potentially introduce emerging secondary contaminants into aquatic environments,posing risks to both aquatic life and human *** resulting chemical by-products and intermediates can effectively induce chronic toxicity,neurological and developmental disorders,cardiovascular defects,and intestinal ailments in humans and aquatic *** having a range of health and environmental consequences,this dark side of nano-photocatalysts has been comparatively less explored and discussed in the *** this review,the pros and cons of powder nanophotocatalysts are discussed in view of their advantages as well as disadvantages in wastewater *** discussion encompasses their classification based on composition,dimensions,structure,and activity,as well as recent advancements in improving their photocatalytic *** article also explores the recent advances on their applications in photocatalytic removal of various water pollutants/contaminants of emerging concern(i.e.,organic pollutants,micro/nano plastics,heavy ions,disinfections,etc.)Furthermore,an emphasis on the role of such nano-photocatalysts as emerging(secondary)contaminants in water system,along with a thorough discussion of latest studies related to the health and environmental issues,has been ***,it addresses critical issues in applying powder nano-photo

关键词： Powder nano-photocatalysts Advanced oxidation processes Wastewater treatment Pros and cons Emerging contaminants Health and environment issues

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Revolutionizing Industry 5.0: Harnessing the Power of Digital Human Modelling

Revolutionizing Industry 5.0: Harnessing the Power of Digita...

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International Symposium for Production Research, ISPR 2023

作者： Donmezer, Semih Demircioglu, Pinar Bogrekci, Ismail Bas, Gokcen Durakbasa, M. Numan Institute of Production Engineering and Photonic Technologies Vienna University of Technology Vienna1060 Austria Institute of Materials Science TUM School of Engineering and Design Technical University of Munich Garching85748 Germany Department of Mechanical Engineering Faculty of Engineering Aydin Adnan Menderes University Aydin09100 Turkey

ISBN: (纸本)9783031539909

Industry 5.0 signifies a significant transformation in the manufacturing sector, propelled by the convergence of advanced technologies and the incorporation of human-centric principles. This work explores the transformative potential of Digital Human Modelling (DHM) in revolutionizing Industry 5.0 across various sectors, including manufacturing, textiles, robotics, and energy. The manufacturing sector stands to benefit significantly from the application of DHM, as it enables enhanced design and optimization of production processes while considering human factors and ergonomics. DHM facilitates the development of human-centered smart factories, enabling efficient operations and improved safety management. In the textile sector, DHM offers opportunities to enhance the design of ergonomic workstations, optimize worker comfort, and improve overall productivity. In the area of robotics, DHM plays a critical role in ensuring the safety and well-being of workers. It enables the evaluation and optimization of human-robot interactions. DHM enables the design of collaborative work environments, where robots and humans can work together. In the energy sector, DHM contributes to the optimization of energy consumption, reducing carbon footprints, and promoting sustainable practices. By harnessing the power of DHM in these sectors, Industry 5.0 can achieve remarkable advancements in terms of efficiency, safety, productivity, and sustainability. This paper highlights the potential of DHM to reshape the manufacturing sector and its applications across textiles, robotics, and energy. The insights and findings presented here serve as a guide for researchers and practitioners aiming to unlock the full potential of DHM in driving the success of Industry 5.0. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Textiles

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Synthesis of coral-like structures of Pr-Yb co-doped YIG: Structural,optical, magnetic and antimicrobial properties

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Journal of Rare Earths 2024年第3期42卷 543-554,I0004页

作者： A.Fernandez Francisca P.Araujo Y.Guerra S.Castro-Lopes J.Matilla-Arias Idglan S.de Lima Edson C.Silva-Filho Josy A.Osajima F.Guerrero R.Pena-Garcia Federal University of Piau Graduate Program in Materials Science and EngineeringTeresinaPIBrazil Federal Rural University of Pernambuco Academic Unit of Cabo de Santo AgostinhoCabo de Santo AgostinhoPEBrazil Federal University of Piaui Department of PhysicTeresinaPBrazil Federal University of Pernambuco Graduate Program in Materials ScienceRecifePEBrazil University of Granma Departmentof Basic Sciences and Applied InformaticsFaculty of Technical SciencesBayamoCuba Federal University of Amazonas Department of PhysicManausAMBrazil Federal University of Pernambuco Department of PhysicRecifePEBrazil

Coral-like structures of the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal structure formation, without any secondary phase. It is shown that, the relatively large ionic radius of the dopant cations results in an expansion of the lattice parameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc-O bond distances and decrease in the average crystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-phase formation of YIG crystal structure and are observed changes in the stretching and vibrational modes, respectively. The morphological study, energy dispersive spectroscopy(EDS) spectra and textural properties show corallike structures, peaks associated with Pr^(3+) and Yb^(3+) atoms and the effect of dopants on surface area,diameter, and pore volume, respectively. The optical analysis from diffuse reflectance spectra witnessed an increase in the optical gap band, a decrease in Urbach energy and blue shift in the charge transfer,correlated with the expansion of the unit cell due to the dopant's insertion in the YIG structure. A typical ferrimagnetic behavior is exhibited by the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12)compound. The saturation magnetization(M_(s)), cubic anisotropy constant(K_(1)) and coercive field(H_(c)) increase with the Pr^(3+)cations content, as consequence of their magnetic nature and distribution around of Fe^(3+)ions due to the coexistence with the Yb^(3+). Finally, for the first time, antibacterial tests by mean of the direct contact method were performed for YIG co-doped with Pr^(3+)and Yb^(3+)and it is shown that, relatively high dosages of Pr^(3+) cations favored the activity against S. aureus, therefore, a new biological property for YIG doped with rare earths is presented.

关键词： Yttrium iron garnet(YIG) Coral-like structures Rare earths Band gap energy Magnetic properties Antimicrobial properties

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Modulating the electronic spin state by constructing dual-metal atomic pairs for activating the dynamic site of oxygen reduction reaction

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Nano Research 2023年第2期16卷 1869-1877页

作者： Shenghua Ye Shuhua Xie Yaqi Lei Xiuyuan Yang Jing Hu Lirong Zheng Zhida Chen Yonghuan Fu Xiangzhong Ren Yongliang Li Xiaoping Ouyang Qianling Zhang Jianhong Liu Xueliang Sun College of Chemistry and Environmental Engineering Graphene Composite Research CenterShenzhen UniversityShenzhen 518060China Department of Mechanical and Materials Engineering University of Western OntarioLondonOntario N6A 5B9Canada Shenzhen Eigen-Equation Graphene Technology Co.Ltd. Shenzhen 518000China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China

In this study,dual-metal atomic pairs of manganese(Mn)-iron(Fe)binuclear sites(BNSs)with two conjoint MnN4 and FeN4 moieties(MnFeN8)anchored onto a graphite-like structure(GLS)(Mn-Fe BNSs/GLS)were *** binuclear MnFeN8 structure was verified experimentally and *** measurements and Gaussian calculations reveal that this unique Mn-Fe BNSs exhibit strong short-range electronic interaction between Mn and Fe sites,which decouples two paired d electrons in Fe sites,thereby transforming Fe sites from an intermediate to a high spin *** optimal electronic configuration of Fe sites and their binuclear structure facilitate an oxygen reduction reaction(ORR)thermodynamically and dynamically,respectively,endowing Mn-Fe BNSs with improved ORR performance.

关键词： manganese(Mn)-iron(Fe)binuclear sites synergistic effect spin state oxygen reduction reaction

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Entropy engineering in CaZn_(2)Sb_(2)-YbMg_(2)Sb_(2)Zintl alloys for enhanced thermoelectric performance

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Rare Metals 2022年第9期41卷 2998-3004页

作者： Ke-Jia Liu Zong-Wei Zhang Chen Chen Li-Hua Wei Huo-Lun He Jun Mao Qian Zhang School of Materials Science and Engineering and Institute of Materials Genome&Big DataHarbin Institute of TechnologyShenzhen518055China Department of Mechanical Engineering The University of Hong KongHong Kong999077China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China

The significant atomic disorder induced by entropy engineering can effectively suppress lattice thermal conductivity and improve thermoelectric *** variety of compositions of Zintl phases offers a wide range of possibilities for entropy *** we successfully prepared a five-component solid solution(CaZn_(2)Sb_(2))_(0.5)(YbMg_(2)Sb_(2))_(0.5) with a configurational entropy of~1.40R,whereR is the gas *** a result,the room-temperature lattice thermal conductivity was only~0.68 W·m^(-1)·K^(-1),which is lower than that of all AM_(2)Sb_(2) Zintl phases.

关键词： alloys entropy performance

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