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Micro-scaled plastic yielding and shear-banding dynamics in metallic glasses

Journal of materials science & Technology 2023年第21期152卷 237-246页

作者： D.X.Han G.Wang Q.Wang R.Feng X.D.Ma K.C.Chan C.T.Liu Institute of Materials Shanghai UniversityShanghai 200444China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina Neutron Scattering Division Oak Ridge National LaboratoryOak RidgeTN 37831United States Department of Material Science and Engineering College of Science and EngineeringCity University of Hong KongHong KongChina Center for Advanced Structural Materials College of Science and EngineeringCity University of Hong KongHong KongChina

Shear-banding behavior in metallic glasses plays a key role in the operation of plastic deformation,which is associated with yield *** a micro-scale,the shear-banding behavior must be affected by many factors from the test machine and the ***,in this study,comprehensively considering a machine compliance,a geometry imperfection of micro-pillar,and a substrate sink-in the machine-sample-substrate system,we developed a plastic-strength model at a micrometer scale in this study,which is evidenced by the microscale compressive properties of 18 kinds of metallic *** the-oretical model provides a guidance for the elastic limits and shear-banding dynamics of metallic glasses at the micro-scale,which can be applicable to characterize the microscale deformation behavior of other amorphous materials.

关键词： Metallic glasses Shear-banding dynamics Micro-compression Plastic deformation

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Highly efficient catalytic activity of MXene Nanosheet supported on CuFeO2 nanoparticles applied on hydrogen evolution

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Ceramics International 2024年第16期51卷 22592-22599页

作者： Lan, Zhen-Yuan Vasu, Dhanapal Liu, Yung-Chieh Yu, Chung-Lun Chiu, Te-Wei Yonezawa, Tetsu Jia, Hongbing Department of Materials and Mineral Resources Engineering National Taipei University of Technology Taipei10608 Taiwan Institute of Materials Science and Engineering National Taipei University of Technology Taipei10608 Taiwan Division of Material Science and Engineering Faculty of Engineering Hokkaido University Hokkaido Sapporo060-8628 Japan Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Nanjing210094 China

The development of efficient and clean renewable energy to replace fossil fuels has been a prominent topic in recent years, with HER in the field of renewable energy widely regarded as a promising avenue. The HER involves the adsorption and desorption of hydrogen ions, making the electron transfer rate particularly crucial. This study employed a novel chemical solution route under an ambient atmosphere to prepare highly crystalline hexagonal ferromagnetic material CuFeO2 nanoparticles. By incorporating the Nanosheet material MXene, forthputting its unique strong interlayer Van Der Waals forces, CuFeO2 is embedded within the layers of MXene. Compounding CuFeO2 with MXene increases the active sites of the material, enhancing electron transfer rates and reducing the required potential for HER. The electrochemical impedance spectroscopy results demonstrated a significant reduction in resistance upon the addition of MXene. The best HER performance was observed in CFO-300mg MX, exhibiting the lowest overpotential of −0.5 V vs. RHE and a Tafel slope of 147 mV dec−1. © 2024

关键词： Hydrogen evolution reaction

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Frameworked electrolytes:Ionic transport behavior and high mobility for solid state batteries

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InfoMat 2024年第2期6卷 76-89页

作者： Jianguo Sun Hao Yuan Jing Yang Tuo Wang Yulin Gao Qi Zhao Ximeng Liu Haimei Wang Yong-Wei Zhang John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore ST Engineering Advanced Material Engineering Pte.Ltd. SingaporeSingapore National University of Singapore(Chongqing)Research Institute Chongqing Liang Jiang New AreaChongqingthe People's Republic of China Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

All solid-state batteries(ASSBs)are the holy grails of rechargeable batteries,where extensive searches are ongoing in the pursuit of ideal solid-state ***,there is still a long way off to the satisfactorily high(enough)ionic conductivity,long-term stability and especially being able to form compatible interfaces with the solid ***,we have explored ionic transport behavior and high mobility in the sub-nano pore networks in the framework ***,the frameworked electrolyte behaves as a solid,and however in the(sub)-nano scales,the very limited number of solvent molecules in confinement makes them completely different from that in liquid *** from a liquid-electrolyte counterpart,the interactions between the mobile ions and surrounding molecules are subject to dramatic changes,leading to a high ionic conductivity at room temperature with a low activation ***+ions in the sub-nano cages of the network structure are highly mobile and diffuse rather independently,where the rate-limiting step of ions crossing cages is driven by the local concentration gradient and the electrostatic interactions between Li^(+)*** new class of frameworked electrolytes(FEs)with both high ionic conductivity and desirable interface with solid electrodes are demonstrated to work with Li-ion batteries,where the ASSB with LiFePO_(4)shows a highly stable electrochemical performance of over 450 cycles at 2℃ at room temperature,with an almost negligible capacity fade of 0.03‰ each *** addition,the FE shows outstanding flexibility and anti-flammability,which are among the key requirements of large-scale applications.

关键词： frameworked electrolyte macroscopically solid with 3D ionic channels in sub-nano-scales solid-state battery space confinement of Li ions

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Superwetting Ag/α-Fe_(2)O_(3) anchored mesh with enhanced photocatalytic and antibacterial activities for efficient water purification

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Green Energy & Environment 2024年第1期9卷 89-103页

作者： Jiakai Li Changpeng Lv Jiajia Song Xiaoling Zhang Xizhen Huang Yingzhuo Ma Haijie Cao Na Liu Department of Chemistry Tsinghua UniversityBeijing100084China Anhui Provincial Engineering Laboratory of Silicon-based Materials Engineering Technology Research Center of Silicon-based Materials(Anhui)School of Material and Chemical EngineeringBengbu UniversityBengbu233030China Institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao UniversityQingdao266071China

Superwetting materials have drawn unprecedented attention in the treatment of oily wastewater due to their preferable anti-fouling property and selective oil/water ***,it is still a challenge to fabricate multifunctional and environmentally friendly materials,which can be stably applied to purify the actual complicated ***,a Ag/Ag/α-Fe_(2)O_(3) heterostructure anchored copper mesh was intentionally synthesized using a facile two-step hydrothermal *** resultant mesh with superhydrophilicity and underwater superoleophobicity was capable of separating various oil/water mixtures with superior separation efﬁciency and high permeationﬂux driven by ***ﬁting from the joint effects of the smaller band gap of Ag/α-Fe_(2)O_(3) heterojunction,inherent antibacterial capacity of Ag/α-Fe_(2)O_(3) and Ag nanoparticles,favorable conductive substrate,as well as the hierarchical structure with superwettability,such mesh presented remarkably enhanced degradation capability toward organic dyes under visible light irradiation and antibacterial activity against both Escherichia coli(***)and Staphylococcus aureus(***)compared with the pure Ag/α-Fe_(2)O_(3) coated ***,the mesh exhibited bifunctional water puriﬁcation performance,in which organic dyes were eliminated simultaneously from water during oil/water separation in oneﬁltration *** importantly,this mesh behaved exceptional chemical resistance,mechanical stability and long-term ***,this material with multifunctional integration may hold promising potential for steady water puriﬁcation in practice.

关键词： Superwetting Ag/α-Fe_(2)O_(3)heterostructure Enhanced photocatalytic and antibacterial activities Water purification Long-term reusability

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Delineation of profoundly birefringent nonlinear photonic crystal fiber in terahertz frequency regime

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Journal of Optical Communications 2025年第1期46卷 41-49页

作者： Yadav, Sapana Singh, Sachin Lohia, Pooja Umar, Ahmad Dwivedi, Dilip Kumar Photonics and Photovoltaic Research Lab Department of Physics and Material Science Madan Mohan Malaviya University of Technology Gorakhpur273010 India Department of Electronics and Communication Engineering Madan Mohan Malaviya University of Technology Gorakhpur273010 India Najran University Najran11001 Saudi Arabia Department of Materials Science and Engineering The Ohio State University Columbus OH43210 United States

The photonic aspects of semiconducting hexagon-shaped photonic crystal fiber including effective mode area, effective mode index, dispersion, and confinement loss, have already been investigated. The finite element method has been used to compute the maximum distribution of the studied photonic crystal fiber by COMSOL software. The linear modifications from both the effective mode index and an effective mode area have been investigated. Dispersion and confinement loss are examined in terms of air hole ring number and wavelength. For every wavelength, the effective-index model implies that the studied fiber can indeed be single mode. Even though its practical single-mode range inside the opacity aperture of silica appears large, it is eventually confined by a bend-loss edge at both brief & medium wavelengths. Moreover, the reported fiber offers minimal confinement loss of almost 10-8 dB/cm, birefringence 0.0012, and dispersion around 10-11 ps/km nm. © 2022 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Birefringence

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Honeycomb-like biochar framework coupled with Fe_(3)O_(4)/FeS nanoparticles as efficient heterogeneous Fenton catalyst for phenol degradation

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Journal of Environmental sciences 2024年第2期136卷 390-399页

作者： Aihua Cheng Yi He Xiaohe Liu Chi He Department of Environmental Engineering College of Geology and EnvironmentXi’an University of Science and TechnologyXi’an 710054China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China National Engineering Laboratory for VOCs Pollution Control Material and Technology University of Chinese Academy of SciencesBeijing 101408China

Achieving an efficient and stable heterogeneous Fenton reaction over a wide pH range is of great significance for wastewater ***,a pollen-derived biochar catalyst with a unique honeycomb-like structure,coupled with the dispersion of magnetic Fe_(3)O_(4)/FeS(Fe/S)nanoparticles,was synthesized by simple impregnation precursor,followed by *** prepared Fe/S-biochar catalyst demonstrated outstanding phenol degradation efficiency across a wide pH range,with 98%of which eliminated even under neutral conditions(pH 7.0).The high catalytic activity was due to the multilevel porous structure of pollenderived biochar provided enough active sites and allowed for better electron transfer,then increases oxidation ability to promote the ***,the acid microenvironment formed by SO_(4)^(2-)group from Fe/S composite extended the pH range for Fenton reaction,and S^(2-)facilitated the conversion of≡Fe^(3+)to≡Fe^(2+),resulting in remarkable degradation ***,biochar can effectively promote cycling stability by limiting Fe *** work may provide a general strategy for designing 3D framework biochar-based Fe/S catalysts with excellent performance for heterogeneous Fenton reactions.

关键词： Biomass Biochar Fenton reaction Fe_(3)O_(4)/FeS(Fe/S) Phenol degradation

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Modeling and Simulation of a Desiccant Coated Kirigami-Based Heat Exchanger

Modeling and Simulation of a Desiccant Coated Kirigami-Based...

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2024 ASHRAE Winter Conference

作者： Smith, Nathaniel Wei, Mingjun Yang, Zhiyao Liu, Mingzhe O’Neill, Zheng Yang, Shu Department of Mechanical Engineering Texas A&M University College StationTX United States Department of Material Science and Engineering University of Pennsylvania PhiladelphiaPA United States

ISBN: (纸本)9781955516822

Desiccant materials absorb water vapor directly from the air without the need to sensibly cool the air below its dewpoint temperature. This provides promising applications in the heating, ventilation, and air-conditioning (HVAC) to reduce energy consumption required for the air dehumidification process. Desiccant coated heat exchangers (DCHX) integrate desiccant materials onto heat exchangers as a compact implementation of desiccant dehumidification into HVAC systems. Compared with other methods of implementation, DCHXs offer better moisture absorption/desorption kinetics due to the active cooling/heating to the desiccant during the alternating dehumidification and regeneration processes. On the other hand, the coupled heat mass transfer with the absorption/desorption on DCHXs poses a challenging problem of a simulation model capable of describing the simultaneous processes for performance prediction, design, and control optimization. This paper describes the development of a model for a DCHX by combining a physics-based model of a hygroscopic hydrogel with a model of a water-cooled coil unit. The model is used to predict the dehumidification and regeneration performance of both a single-DCHX and a dual-DCHX operation of drying air. The model is also used to investigate the effects of key operation parameters including air flow rate and inlet air humidity. © 2024 ASHRAE.

关键词： Heat exchangers

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PROSPECTIVE LIFE CYCLE ASSESSMENT OF NONWOVEN MAT MANUFACTURING: COMPARING PRE-CONSUMER WOOD WASTE FIBERS TO POST-CONSUMER RECYCLED APPAREL FIBERS

PROSPECTIVE LIFE CYCLE ASSESSMENT OF NONWOVEN MAT MANUFACTUR...

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ASME 2024 International Design engineering Technical Conferences and Computers and Information in engineering Conference, IDETC-CIE 2024

作者： Durrani, Hira Clarke-Sather, Abigail R. Alves, Paulo H.T.F. University of Minnesota Duluth Applied Material Science DuluthMN United States Department of Mechanical and Industrial Engineering DuluthMN United States

ISBN: (纸本)9780791888391

The apparel industry’s substantial contribution to increasing Municipal Solid Waste (MSW) from discarded apparel through fast fashion approaches necessitates exploring sustainable alternatives. Over the past fifty years, throwing away textiles has risen four times as fast as MSW generation rates in the U.S. This study examines the environmental impact of an existing nonwoven mat manufacturer that uses pre-consumer wood waste to make fiber for nonwoven mats with a post-consumer recycled apparel alternative. This alternative, the Fiber Shredder, a lab-scale innovative mechanical textile recycling technology, takes discarded apparel and turns it into valuable fiber. The recycled cotton fiber produced by the Fiber Shredder from discarded apparel is long enough to manufacture new nonwoven textiles. The final products, nonwoven mats, are intended for landscaping purposes and thus use biodegradable fibers. The novel mechanical textile recycling technology to create fibers from discarded apparel, the Fiber Shredder, developed at the University of Minnesota Duluth, is scaled up theoretically to compare its potential impact upon commercialization to an existing industrial process that creates wood fibers from waste wood. A prospective Life Cycle Assessment (LCA) compared the environmental impacts of three options for manufacturing nonwoven mats;(A) pre-consumer waste wood fibers, (B) current lab scale post-consumer recycled cotton fibers from the Fiber Shredder and (C) post-consumer recycled cotton fibers from the scaled up Fiber Shredder. This LCA encompasses emissions, energy usage, and materials from the acquisition of raw materials through the production processes or cradle-to-gate. The results show that although the lab-scale Fiber Shredder has higher environmental impacts than the commercial nonwoven manufacturer, scaling up the Fiber Shredder will lead to reduced impacts. However, the scaled-up Fiber Shredder still needs improvement in electricity consumption and speed

关键词： Municipal solid waste

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Design and Optimization of the Porous Metamaterial EM Absorbers in X-band

Design and Optimization of the Porous Metamaterial EM Absorb...

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2023 IEEE Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMC+SIPI 2023

作者： Anurakparadorn, Kanat Taub, Alan Michielssen, Eric University of Michigan Macromolecular Science and Engineering Program Department of Material Science and Engineering Ann ArborMI United States University of Michigan Department of Mechanical Engineering Ann ArborMI United States University of Michigan Department of Electrical Engineering and Computer Science Ann ArborMI United States

ISBN: (纸本)9798350309768

A strategy that combines experiment and simulation to design and optimize electromagnetic (EM) metamaterial absorbers containing a periodic porous structure is described. The approach provides the ability to produce absorbers that meet multiple user-specified objectives. Using the measured intrinsic properties of the baseline materials as an input to EM-field based computational modelling and optimization, absorption by the studied metamaterials measured by their reflection loss (RL) increases significantly. The resulting metamaterials have the potential for lower cost and lighter weight while providing greater protection than traditional metal gaskets and foams. © 2023 IEEE.

关键词： Metamaterials

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Effect of orbital symmetry on atomic ionization in near-infrared laser fields

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Chinese Physics B 2025年第1期34卷 289-292页

作者： Manqi Xu Shilin Hu Li Guo Jing Chen Research Center for Advanced Optics and Photoelectronics Department of PhysicsCollege of ScienceShantou UniversityShantou 515063China Key Laboratory of Intelligent Manufacturing Technology of MOE Shantou UniversityShantou 515063China Department of Physics Shanghai Normal UniversityShanghai 200234China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China

We have performed a comparative study of the photoelectron spectra adopting different initial states(2s or 2_(p0))of hydrogen atoms in a near-infrared laser pulse by using the full three-dimensional time-dependent Schr?dinger *** is demonstrated that the atomic photoelectron spectra oscillate out of step as a function of electron kinetic energies for different initial states(2s or 2_(p0)),which is well reproduced by the simulations based on strong field approximation,and the above distinct feature is ascribed to the different interferences from the partial electron wave packets detached by positive and negative electric fields for different initial states of 2s and 2_(p0).

关键词： orbital symmetry photoelectron spectra strong-field approximation

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