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A Nonlinear Optical Switchable Sulfate of Ultrawide Bandgap

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CCS Chemistry 2021年第7期3卷 2298-2306页

作者： Yanqiang Li Congling Yin Xiaoyan Yang Xiaojun Kuang Jie Chen Lunhua He Qingran Ding Sangen Zhao Maochun Hong Junhua Luo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 University of Chinese Academy of Sciences Beijing 100049 MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilinGuangxi 541004 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190 Songshan Lake Materials Laboratory DongguanGuangdong 523808 Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China FuzhouFujian 350108

Nonlinear optical(NLO)switchable materials have attracted intense attention because of their promising applications in optoelectronic ***,previous studies are mainly limited to molecular-based compounds that usually exhibit narrow ***,we report all-inorganic Li_(9)Na_(3)Rb_(2)(SO_(4))_(7) as an ultrawide-bandgap NLO switchable material.

关键词： ultrawide bandgap NLO optics switchable material phase transition sulfates

Diffusion and Reaction Behavior of Palladium Coating and Copper Matrix Prepared by Halogen-Free Direct Coating Palladium technology

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SSRN 2023年

作者： Su, Hui Li, Shaolin Song, Kexing Zhou, Yanjun Cao, Jun Cao, Fei Gao, Yan Ge, Chenyang Li, Jiyuan Henan University of Science and Technology Henan Key Laboratory of Nonferrous Materials Science and Processing Technology Luoyang471023 China Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology Luoyang471023 China Henan Academy of Sciences Zhengzhou450002 China Henan Polytechnic University China Xi’an University of Technology Xi’an710000 China Henan Institute of Metallurgy Zhengzhou450000 China

Palladium-coated copper wires at different coating temperatures were prepared by the halogen-free direct coating process. The effects of coating temperature on the morphology of palladium coated on the surface of copper wire and the mechanical properties of palladium-coated copper wire were studied. The microstructure characteristics of the palladium coating at typical temperatures and the diffusion, reaction and bonding characteristics of the copper-palladium interface were discussed, and the diffusion, reaction and bonding characteristics of elements at the copper-palladium interface. The influence mechanism of coating temperature on the surface morphology of the palladium coating was proposed. © 2023, The Authors. All rights reserved.

关键词： Diffusion

Nanoporous nickel with rich adsorbed oxygen for efficient alkaline hydrogen evolution electrocatalysis

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Science China materials 2022年第7期65卷 1825-1832页

作者： Qingfeng Hu Zelin Chen Jiajun Wang Xuerong Zheng Xiaopeng Han Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Sluggish water dissociation kinetics severely limits the rate of alkaline electrocatalytic hydrogen evolution reaction(HER).Therefore,finding highly active electrocatalysts and clarifying the mechanism of water dissociation are challenging but *** this study,we report an integrated nanoporous nickel(np-Ni)catalyst with high alkaline HER performance and the origin of the corresponding enhanced catalytic *** 1 mol L^(-1) KOH solution,this np-Ni electrode shows an HER overpotential of 20 mV at 10 mA cm^(-2),along with fast water dissociation *** excellent performance is not only attributed to the large surface area provided by the three-dimensional interconnected conductive network but also from the enhanced intrinsic activity induced by the unique surface *** studies reveal that the types of oxygen species that naturally form on the Ni surface play a key role in water ***,when the lattice oxygen almost disappears,the Ni surface terminates with_(ads)orbed oxygen(O_(ads)),exhibiting the fastest water dissociation *** functional theory calculation suggests that when O_(ads)acts as the surface termination of Ni metal,the orientation and configuration of polar water molecules are strongly affected by O_(ads).Finally,the H–OH bond of interfacial water molecules is effectively activated in a manner similar to hydrogen *** work not only identifies a high-performance and low-cost electrocatalyst but also provides new insights into the chemical processes underlying water dissociation,thus benefiting the rational design of electrocatalysts.

关键词： alkaline hydrogen evolution water dissociation electron redistribution adsorbed oxygen hydrogen bond

Interface suppressed nematicity and enhanced superconductivity of FeSe/NdFeO3 in the low doping regime

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arXiv

arXiv 2024年

作者： Li, Chihao Song, Yuanhe Wang, Xiaoxiao Lei, Minyinan Chen, Xiaoyang Xu, Haichao Peng, Rui Feng, Donglai Laboratory of Advanced Materials State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200438 China Shanghai Research Center for Quantum Sciences Shanghai201315 China National Synchrotron Radiation Laboratory School of Nuclear Science and Technology University of Science and Technology of China Hefei230026 China New Cornerstone Science Laboratory University of Science and Technology of China Hefei230026 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

The discovery of interface-enhanced superconductivity in single-layer FeSe/oxides has generated intensive research interests. Beyond the family of FeSe interfaced with various TiO2 terminated oxides, high pairing temperature up to 80 K has been recently observed in FeSe interfaced with FeOx-terminated LaFeO3. Here we successfully extend the FeSe/FeOx superconducting interface to FeSe/NdFeO3, by constructing 1uc-FeSe/6uc-NdFeO3/Nb:SrTiO3 heterostructures. Intriguingly, well-annealed FeSe/NdFeO3 exhibits a low doping level of 0.038∼0.046 e−/Fe which deviates universally magic doping level (0.10∼0.12 e−/Fe) and provides a new playground for studying the FeSe/oxide interface in the low electron-doped regime. Comparing it with thick FeSe films at the comparable electron doping level induced by surface potassium dosing, FeSe/NdFeO3 shows a larger superconducting gap and the absence of a nematic gap, indicating an enhancement of the superconductivity and suppression of nematicity by the FeSe/FeOx interface. These results not only expand the FeSe/FeOx superconducting family but also enrich the current understanding on the roles of the oxide interface. © 2024, CC BY.

关键词： Iron compounds

Differential Effects of Sn and Si Solutes on the Microstructure and Properties of Cu–Ni–Al Alloys with Coherent L12-Γ′ Phases

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SSRN 2023年

作者： Li, Zhumin Hu, Yinglin Zheng, Yuehong Liu, Renwei Li, Jiansheng Liu, Tong Liu, Qi Li, Xiaona School of Materials Science and Engineering Anhui Polytechnic University Wuhu241000 China Key Laboratory of Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Ministry of Education Dalian116024 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Shimadzu China Co. LTD Shanghai200233 China

In order to further improve the comprehensive properties and inhibit the discontinuous precipitation of nano-spherical γ′ coherent precipitates strengthened Cu-Ni-Al alloys. Herein, the Si and Sn, with same main group but showing different elemental interaction, was selected as the fourth element in the way of replacing a small portion of Ni, and series of alloy composition were designed and prepared in a wide Cu content (75~85.71 at. %), and the effect of Si or Sn addition on microstructure, properties at room temperature and stability are investigated. The results demonstrate that Si is completely dissolved into γ and γ′ phase, but a little of Sn solid solution into γ′ phase. The two adding elements can accelerate the precipitation of γ′ phase, suppress the grain boundaries discontinuous precipitation and provide dual-nanostructure strengthening effect, which enhance the hardness and conductivity, and Si exhibits more preferable effect. The thermodynamic calculation and the work function results indicate that the addition of Sn would induce the descending stability of γ and γ′ phase, but Si is beneficial to the improvement of stability and γ and γ′ phase. Compared to Sn, Si is more suitable to be a candidate for the multi-component design of Cu–Ni–Al alloy. These findings may offer new insights on composition optimization of Cu–Ni–Al alloy with coherent L12-γ′ phases. © 2023, The Authors. All rights reserved.

关键词： Precipitation (chemical)

High salinity brine zero liquid discharge enabled by fabric-based evaporator with heterogeneous ion diffusion

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Separation and Purification technology 2025年 376卷

作者： Zhuo, Lei Zhang, Zhixun Liu, Zixiao Xiao, Xingfang Zhang, Qian Wang, Yuanfeng Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Department of Materials Science and Engineering University of California Los Angeles Los AngelesCA90095 United States

Designing solar evaporators with efficient water transport pathways represents an innovative solution for industrial brine wastewater desalination and resource recovery. However, many existing approaches struggle to sustain performance under high-salinity conditions, posing significant challenges for practical applications. Herein, we report a fabric-based evaporator with heterogeneous ion diffusion (FEHID) designed for zero liquid discharge (ZLD) desalination of high-concentration saline water. Constructed using pyrrole modified cotton fabric with distinct plain and tubular patterns, the FEHID exploits heterogeneous ion diffusion to control salt crystallization while achieving a photothermal conversion efficiency of 92.6 % under one sun illumination. The tubular sections enhanced water supply via capillary action, directing saline water flow and promoting localized salt crystallization in plain regions for easy collection. Additionally, the water supply regulated temperature of the evaporator, thereby maximizing thermal utilization efficiency. The FEHID achieved an evaporation rate of 1.53 kg·m−2·h−1 for 15 wt% saline water under one sun illumination, which was accomplished by adjusting the number of filled yarns, maintaining stable performance during an 8-hour desalination test. Outdoor experiments further demonstrated superior evaporation efficiency and salt resistance over seven days, with freshwater output exceeding 10.5 L·m−2·d−1. The scalable, industrially manufacturable design highlights FEHID as a viable approach for sustainable saline wastewater treatment and resource recovery. © 2025

关键词： Desalination

Ultrabroadband and Multifunctional Achromatic Mikaelian Lens on an Elastic Plate

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Physical Review Applied 2022年第6期18卷 064047-064047页

作者： Jin Chen Guangyuan Su Shaohang Xu Mingji Chen Yongquan Liu Daining Fang Ji Zhou School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory for Strength and Vibration of Mechanical Structures Department of Engineering Mechanics School of Aerospace Engineering Xi’an Jiaotong University Xi’an 710049 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The emergence and development of acoustic artificial materials stimulate a large number of applications for the manipulation of ultrasonic and elastic waves. Most of the reported metasurfaces and metamaterials only work effectively at a given frequency and target a fixed functionality. Reconfigurable designs may solve this problem, to a certain extent, but require the introduction of complex active control components. Here, by integrating multiple functionalities on a conformally mapped Mikaelian lens with a hyperbolic secant refractive-index distribution, a broadband passive lens is presented and accomplished on an elastic plate. Just by adjusting the location and type of source, different regulations of flexural waves can be switched from one sort to another. Through projecting the refractive-index profile onto the thickness of the plates, the proposed Mikaelian lens is designed and fabricated. Theoretical prediction and experimental results demonstrate beam scanning at an angle of up to 120° from 30 to 180 kHz and achromatic subwavelength focusing with a full width at half maximum of around 0.3λ from 30 to 120 kHz. Without using locally resonant materials or active control elements, this work provides a feasible way to construct multifunctional flexural-wave devices.

关键词： Acoustic metamaterials Continuum mechanics Mechanical deformation

Effect of Rare Earth Elements on Corrosion Resistance of Austenitic Stainless Steel

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SSRN 2023年

作者： Yu, Panpan Mukhtar, Aiman Huang, Lei Wang, Pan Wang, Zhihui Zhao, Tianliang Wu, Kaiming The State Key Laboratory of Refractories and Metallurgy Hubei Province Key Laboratory of Systems Science in Metallurgical Process International Research Institute for Steel Technology Collaborative Innovation Center for Advanced Steels Wuhan University of Science and Technology Wuhan China Iron and Steel New Technology Research Institute Guangxi BG New Materials Co LTD Beihai536000 China

The effect of rare earth (RE) on pitting resistance of austenitic stainless steel was studied by chemical immersion, electrochemical impedance spectroscopy, and potentiodynamic polarization. The morphology of inclusions was characterized by scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS). The results show that the inclusions of stainless steel without rare earth are mainly (Al,Mg,Si,Ca)-Ox composite inclusions. With the increase of rare earth content in austenitic stainless steel, the content of Al was significantly reduced, and the inclusions were gradually transformed into spherical rare earth inclusions. Addition of 0.005% rare earth content to 0-RE stainless steel can reduce the area and number of inclusions, while 0.011% can enlarge the size and increase the number of inclusions, which can also be the reason of lowered pitting corrosion resistance of H-RE stainless steel than M-RE stainless steel. The electrochemical test results show that with the increase of rare earth content, the pitting potential increases first, and an appropriate amount of rare earth elements can promote the formation of iron oxide in the protective phase of the passivated film, making it denser, thus improving the corrosion resistance of the material. Mott-Schottky measurements show that n-type passive films with reduced carrier concentration are formed on the surface of austenitic stainless steel. This study provides a theoretical basis for the application of rare earth in stainless-steel. © 2023, The Authors. All rights reserved.

关键词： Corrosion resistance

Superwettable Microchip for Visual Detection of Date-Rape Drug in Beverages

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SSRN 2024年

作者： Li, Zhenping Xu, Hao Du, Yukun Huang, Zhongyu Li, Jing Liu, Lian Dong, Ying Yang, Xiao-Yu Department of Forensic Medicine Tongji Medical College Huazhong University of Science and Technology 13 Hangkong Road Wuhan430030 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Shenzhen Research Institute Laoshan Laboratory Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology 947 Peace Avenue Wuhan430081 China Optosky Optical LTD 1130 Jimei North Avenue Xiamen361022 China Hubei Key Laboratory of the Forensic Science Hubei University of Police 99 Nanniwan Avenue Wuhan430034 China

Gamma-hydroxybutyric acid (GHB), which is used in drug-facilitated sexual assault, is typically delivered in the form of gamma-butyrolactone (GBL) in beverage carriers. In response to the growing need of methods for rapid and on-site sensing of the drugs, we carried out an investigation aimed at developing a superwettable microchip for visual detection of the date-rape drug GBL in adulterated beverages. The superwettable microchip is comprised of Fe3O4 nanoparticles which aggregate to form a reactive spot on a superhydrophobic fabric. The spot captures and confines microdroplets containing GBL on the superhydrophobic substrate. Fe(III), generated by HCl promoted reaction of the Fe3O4 spot, then participates in a colorimetric reaction with GBL to form a naked eye observable colored complex. Quantitative determination of GBL in beverages is achieved by analyzing the red-color content of a smartphone camera derived image. The detection range of this assay protocol is ca. 0.05-10 mg mL−1, which meets the requirements to detect potentially dangerous concentration of GBL in drinks. The detection stability of the superwettable microchip for GBL in water and common beverages is maintained over at least 30 cycles. © 2024, The Authors. All rights reserved.

关键词： Nanoparticles