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Surface activation of viscose textiles via air,argon,and oxygen dielectric barrier discharge plasma:influence of peak voltage

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plasma Science and Technology 2024年第7期26卷 134-147页

作者： Shrouk ELASHRY Usama M.RASHED Mostafa A.WAHBA Hend M.AHMED Nabil M.ELSIRAGY plasma Laboratory Physics DepartmentFaculty of scienceTanta UniversityTanta 31527Egypt physics Department Faculty of Science(Male)Al-Azhar UniversityCairo 11651Egypt Textile Research Industrial division National Research CentreDokkiGiza 12622Egypt

This paper discusses the use of atmospheric pressure dielectric barrier discharge(DBD)plasma treatment to enhance the surface qualities of viscose *** study explores the effects of different plasma gases,discharge voltages,and exposure times on the treated *** findings emphasize the importance of optimizing the plasma's peak voltage to achieve the desired surface treatment *** document also presents data on colour strength,wettability,colour fastness,and tensile strength of the treated fabrics,as well as scanning electron microscopy(SEM)analysis of surface morphology and chemical analysis using fouriertransition infrared spectroscopy(FTIR)and energy dispersive X-ray(EDX).The results show that treatment at a peak voltage of 11.83 k V is more efficient,except for the tensile strength which is enhanced at a peak voltage of 8.92 k *** oxygen plasma treatment significantly improves the colour strength,which exhibits an increase from 11 to *** intensified colour was attributed to the significant influence of electrostatic interactions between the charged hydroxyl groups of the oxygen plasma treated viscose textiles and the dye molecules,which enhance the *** oxygen DBD plasma exhibits a higher ability to enhance the properties of textiles when compared to air and argon *** study presents a sustainable,economical,secure,and ecologically friendly approach to explore new fabrics for specific uses.

关键词： Lissajous diagrams printability wettability tensile strength SEM EDX FTIR

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Probing valence quark width of the proton in deeply virtual Compton scattering at high energies

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Chinese physics C 2024年第5期48卷 235-243页

作者：向文昌曹德文周代翠 physics division Guangzhou Maritime UniversityGuangzhou 510725China Key Laboratory of Quark and Lepton physics(MOE) and Institute of Particle PhysicsCentral China Normal UniversityWuhan 430079China

We use the refined hot spot model to study the valence quark shape of the proton with the deeply virtual Compton scattering at high energies in the color glass condensate *** investigate the individual valence quark shape,a novel treatment of the valence quark width is *** calculate the cross-sections for coherent and incoherent deeply virtual Compton scattering using,for the first time,different widths(Bu and Bd)for the profile density distributions of the up and down quarks instead of using the same width as in the *** find that the cross-sections calculated with Bu≥Bd at each collision energy are consistent with each other,which is in agreement with theoretical expectations,whereas those computed with Bu

关键词： gluon saturation physics color glass condensate proton shape fluctuations

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A simple method for pulse contrast enhancement via self-focusing

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High Power Laser Science and Engineering 2024年第2期12卷 51-61页

作者： Zaharit Refaeli Gilad Marcus Yariv Shamir Applied physics division Soreq NRCYavneIsrael Applied physics Institute The Hebrew UniversityThe Edmond J.Safra Campus-Givat RamJerusalemIsrael

Here we report on a simple-to-implement and cost-effective approach for laser pulse contrast enhancement,based on the χ(3)nonlinear self-focusing *** intentionally induced and gently controlled self-focusing in a thin glass transforms the time-dependent intensity into variation in beam *** by a spatial discriminating filter,only the strongly focused fraction traverses the setup,at the expense of efficiency.A numerical model,accounting for the pulse and material parameters via a Gaussian ABCD matrix,provides an estimate for the instantaneous beam waist and transmission efficiency,which enables us to evaluate the resulting contrast *** estimated contrast enhancement spans between 0.5 and 2.5 orders of magnitude,in conjunction with approximately 25%–90%estimated efficiency,depending on the pulse *** a preliminary experiment we demonstrated the effect with 10s-μJ sub GW regime with approximately 40%efficiency and a contrast improvement of more than or equal to 20 dB.

关键词： nonlinear optics pulse contrast self-focusing ultrafast laser

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Perspective of alkaline zinc-based flow batteries

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Science China Chemistry 2024年第1期67卷 260-275页

作者： Zhizhang Yuan Xianfeng Li division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 110623China

Energy storage technologies have been identified as the key in constructing new electric power systems and achieving carbon neutrality,as they can absorb and smooth the renewables-generated *** zinc-based flow batteries are well suitable for stationary energy storage applications,since they feature the advantages of high safety,high cell voltage and low ***,many alkaline zinc-based flow batteries have been proposed and developed,e.g.,the alkaline zinc–iron flow battery and alkaline zinc–nickel flow *** development and application are closely related to advanced materials and battery *** this perspective,we will first provide a brief introduction and discussion of alkaline zinc-based flow *** we focus on these batteries from the perspective of their current status,challenges and *** bottlenecks for these batteries are briefly *** with the practical requirements and development trends of alkaline zinc-based flow battery technologies,their future development and research direction will be summarized.

关键词： energy storage alkaline zinc-based flow batteries advanced materials battery structure

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Molecular dynamics study of primary radiation damage in TiVTa concentrated solid-solution alloy

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Chinese physics B 2024年第3期33卷 530-535页

作者：赵永鹏豆艳坤贺新福曹晗王林枫邓辉球杨文 Reactor Engineering Technology Research division China Institute of Atomic EnergyBeijing 102413China School of physics and Electronics Hunan UniversityChangsha 410082China

The primary radiation damage in pure V and TiVTa concentrated solid-solution alloy(CSA)was studied using a molecular dynamics *** have performed displacement cascade simulations to explore the generation and evolution behavior of irradiation *** results demonstrate that the defect accumulation and agglomeration in TiVTa CSA are significantly suppressed compared to pure *** peak value of Frenkel pairs during cascade collisions in TiVTa CSA is much higher than that in pure V due to the lower formation energy of point ***,the longer lifetime of the thermal spike relaxation and slow energy dissipation capability of TiVTa CSA can facilitate the recombination of point *** defect agglomeration rate in TiVTa CSA is much lower due to the lower binding energy of interstitial clusters and reduced interstitial ***,the occurrence probability of dislocation loops in TiVTa CSA is lower than that in pure *** reduction in primary radiation damage may enhance the radiation resistance of TiVTa CSA,and the improved radiation tolerance is primarily attributed to the relaxation stage and long-term defect evolution rather than the ballistic *** results can provide fundamental insights into irradiation-induced defects evolution in refractory CSAs.

关键词： concentrated solid-solution alloy primary radiation damage molecular dynamics simulation

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Design and fabrication of Nd-Fe-B magnet with excellent thermal stability

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Journal of Rare Earths 2024年第5期42卷 980-986,I0006页

作者： Rui Han Shengzhi Dong Dong Li Dongmin Zhang Hongsheng Chen Jiyuan Xu George CHadjipanayis Zhuolin Li Ying Zhang Wei Li division of Functional Materials Research Central Iron and Steel Research InstituteBeijing100081China Department of physics and Astronomy Sharp Lab University of DelawareNewarkDE19716USA Beijing National Laboratory for Condensed Matter physics Institute of PhysicsChinese Academy of SciencesBeijing100190China

A novel Nd-Fe-B type permanent magnet with excellent thermal stability was designed by Co replacing Fe in the main phase and the grain boundary *** remanence and coercivity temperature coefficient reach 0.058%/℃and 0.465%/℃in the te mperature range from 25 to 100℃,which are much lower than those of commercial Nd-Fe-B *** enhanced Curie temperature is obtained for the novel magnet due to the Co substitution,which significantly improves the operating *** microstructure result reveals that an amorphous phase exists in the intergranular grains which is probably responsible for the deterioration of intrinsic *** work can provide a reference for the design and optimization of components of sintered Nd-Fe-B magnets with excellent thermal stability.

关键词： Thermal stability Remanence temperature coefficient Operating temperature Atomic substitution Rare earths

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Circular polarization-selective optical,photothermal,and optofluidic effects in chiral metasurfaces

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Photonics Research 2024年第2期12卷 331-340页

作者： CUIPING MA PENG YU ZHIMIN JING YISONG ZHU PEIHANG LI WENHAO WANG HONGXING XU YANNING ZHANG LIANG PAN TAE-YOUL CHOI ARUP NEOGI ALEXANDER OGOVOROV ZHIMING WANG Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China division of physics and Applied physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore School of physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China Department of Mechanical Engineering University of North TexasDentonTexas 76207USA Department of physics and Astronomy and Nanoscale and Quantum Phenomena Institute Ohio UniversityAthensOhio 45701USA

Circular dichroism (CD) is extensively used in various material systems for applications including biological detection,enantioselective catalysis,and chiral *** paper introduces a chiral absorptive metasurface that exhibits a circular polarization-selective effect in dual bands-positive and negative CD peaks at short wavelengths and long wavelengths,***,we uncover that this phenomenon extends beyond the far-field optical response,as it is also observed in the photothermal effect and the dynamics of thermally induced fluid *** carefully engineering the metasurface design,we achieve two distinct CD signals with high g factors (1) at the wavelengths of 877 nm and 1045 nm,*** findings presented in this study advance our comprehension of CD and offer promising prospects for enhancing chiral light–matter interactions in the domains of nanophotonics and optofluidics.

关键词： chiral catalysis circular

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Accurate estimation of Li/Ni mixing degree of lithium nickel oxide cathode materials

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Chinese physics B 2024年第5期33卷 631-635页

作者：陈鹏浩徐磊禹习谦李泓 Institute of physics Chinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Frontier Research Center on Clean Energy Huairou DivisionInstitute of PhysicsChinese Academy of SciencesBeijing 101400China

Li/Ni mixing negatively influences the discharge capacity of lithium nickel oxide and high-nickel ternary cathode ***,accurately measuring the Li/Ni mixing degree is difficult due to the preferred orientation of labbased XRD measurements using Bragg–Brentano ***,we find that employing spherical harmonics in Rietveld refinement to eliminate the preferred orientation can significantly decrease the measurement error of the Li/Ni mixing *** Li/Ni mixing ratio obtained from Rietveld refinement with spherical harmonics shows a strong correlation with discharge capacity,which means the electrochemical capacity of lithium nickel oxide and high-nickel ternary cathode can be estimated by the Li/Ni mixing *** findings provide a simple and accurate method to estimate the Li/Ni mixing degree,which is valuable to the structural analysis and screening of the synthesis conditions of lithium nickel oxide and high-nickel ternary cathode materials.

关键词： lithium nickel oxide high-nickel ternary cathode Li/Ni mixing spherical harmonics function discharge capacity

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Interface and mechanical degradation mechanisms of the silicon anode in sulfide-based solid-state batteries at high temperatures

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Chinese physics B 2024年第8期33卷 117-126页

作者：王秋辰黄昱力许晶禹习谦李泓陈立泉 Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Huairou division Institute of PhysicsChinese Academy of SciencesBeijing 101408China

Silicon(Si)is a competitive anode material owing to its high theoretical capacity and low electrochemical ***,the prospect of Si anodes in solid-state batteries(SSBs)has been proposed due to less solid electrolyte interphase(SEI)formation and particle ***,major challenges arise for Si anodes in SSBs at elevated *** this work,the failure mechanisms of Si-Li_(6)PS_(5)Cl(LPSC)composite anodes above 80℃are thoroughly investigated from the perspectives of interface stability and(electro)chemo-mechanical *** chemistry and growth kinetics of Lix Si|LPSC interphase are demonstrated by combining electrochemical,chemical and computational *** and/or Si–P compound formed at Lix Si|LPSC interface prove to be detrimental to interface stability at high *** the other hand,excessive volume expansion and local stress caused by Si lithiation at high temperatures damage the mechanical structure of Si-LPSC composite *** work elucidates the behavior and failure mechanisms of Si-based anodes in SSBs at high temperatures and provides insights into upgrading Si-based anodes for application in SSBs.

关键词： sulfide electrolytes silicon anodes interface stability degradation kinetics all-solid-state batteries

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Vertical plane depth-resolved surface potential and carrier separation characteristics in flexible CZTSSe solar cells with over 12% efficiency

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Carbon Energy 2024年第3期6卷 36-52页

作者： Dae-Ho Son Ha Kyung Park Dae-Hwan Kim Jin-Kyu Kang Shi-Joon Sung Dae-Kue Hwang Jaebaek Lee Dong-Hwan Jeon Yunae Cho William Jo Taeseon Lee JunHo Kim Sang-Hoon Nam Kee-Jeong Yang division of Energy Technology DGISTDaeguRepublic of Korea Research Center for Thin Film Solar Cells DGISTDaeguRepublic of Korea Department of physics Ewha Womans UniversitySeoulRepublic of Korea Department of physics Incheon National UniversityIncheonRepublic of Korea Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

Cu2ZnSn(S,Se)4(CZTSSe)solar cells have resource distribution and economic *** main cause of their low efficiency is carrier loss resulting from recombination of photo-generated electron and *** overcome this,it is important to understand their electron-hole behavior *** determine the carrier separation characteristics,we measured the surface potential and the local current in terms of the absorber *** elemental variation in the intragrains(IGs)and at the grain boundaries(GBs)caused a band edge shift and bandgap(Eg)*** the absorber surface and subsurface,an upward Ec and Ev band bending structure was observed at the GBs,and the carrier separation was *** the absorber center,both upward Ec and Ev and downward Ec-upward Ev band bending structures were observed at the GBs,and the carrier separation was *** improve the carrier separation and suppress carrier recombination,an upward Ec and Ev band bending structure at the GBs is desirable.

关键词： carrier separation CZTSSe flexible solar cell local current surface potential

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