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Two-dimensional Dir.c plasmon-polaritons in graphene,3D topological insulator and hybrid systems

Light(Science & Applications) 2022年第11期11卷 2602-2616页

作者： Chihun In un Jeong Kim Hyunyong Choi Department of Physics Freie Universitat BerlinBerlin 14195Germany Department of Physical Chemistry Fritz-Haber-lInstitute of the Max-Planck-SocietyBerlin 14195Germany Department of Physics and Astronomy Seoul National UniversitySeoul 08826Republic of Korea Institute of Applied Physics Seoul National UniversitySeoul 08826Republic of Korea Advanced Sensor Laboratory Samsung Advanced Institute of TechnologySuwonGyeonggido 16419Republic of Korea

Collective oscillations of massless particles in two-dimensional(2D)Dir.c materials offer an innovative route toward implementing atomically thin devices based on low-energy quasiparticle *** confinement of nearfield distribution on the 2D surface is essential to demonstrate extraordinary optoelectronic functions,providing means to shape the spectral response at the mid-infrared(ir.*** the dynamic polarization from the linear response theory has successfully accounted for a range of experimental observations,a unified perspective was stll elusive,connecting the state-of-the-art developments based on the 2D Dir.c ***,we review recent works on graphene and three-dimensional(3D)topological insulator(TI)plasmon-polariton,where the mid-ir.and terahertz(THz)radiation experiences prominent confinement into a deep-subwavelength scale in a novel optoelectronic *** presenting general light-matter interactions between 2D Dir.c plasmon and subwavelength quasiparticle excitations,we introduce various experimental techniques to couple the plasmonpolaritons with electromagnetic *** and optical controls over the plasmonic excitations reveal the hybridized plasmon modes in graphene and 3D Tl,demonstrating an intense near-field interaction of 2D Dir.c plasmon within the highly-compressed *** findings can further be applied to invent optoelectronic biomolecular sensors,atomically thin photodetectors,and laser-driven light sources.

关键词： structure Dir.c topological

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Towards defining soil quality of Mediterranean calcareous agricultural soils:Reference values and potential core indicator set

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International Soil and Water Conservation Research 2024年第1期12卷 145-155页

作者： Germán A.durán Daniel Sacristán Edelweis Farrús Jaume Vadell Institut de Recerca i FormacióAgrària i Pesquera de les Illes Balears C/Eusebi Estada14507009PalmaSpain Plant Biology Department University of Valencia46100BurjassotValenciaSpain Soil and Envir.nmental Quality Department Centro de Investigaciones sobre Desertificación-CIDE(CSIC-Universitat de València-Generalitat Valenciana)Carretera Moncada-Náquera km 4.546113MoncadaValenciaSpain universitat de les Illes Balears Cra.De Valldemossakm 7507122PalmaSpain

To avoid soil degradation,adapt to climate change and comply with the Sustainable Development goals 2030(un General Assembly),establishing the quality/fertility of the agricultural soils of the Mediterranean region and evaluate how these evolve with time is *** enables adequate management practices to be *** Mediterranean calcareous region has received little attention in this sense,in spite its soil ***,24 different representative calcareous agricultural soils of the Mediterranean region,including the main management strategies of agricultural soils(rainfed and ir.igated),were sampled from the island of Mallorca;and their.physical,chemical and biological properties *** values obtained for most of the soil characteristics allowed to establish an initial approach to the reference values for the type of calcareous agricultural soils considered,and to clearly distinguish the effect of rainfed or ir.igation management practices on soils properties and *** enzyme activities were not stimulated by the ir.igation conditions assayed or they were only in dry conditions,suggesting optimum enzyme activities could be obtained when alternating dry and humid soil *** organic carbon,calcium carbonate and active lime revealed of significant importance in the collection of ***,the results obtained clearly indicate the heterogeneity of the region and its implications on the different soil ***,this study could serve as a starting point to adequately establish the quality(fertility)for Mediterranean calcareous agricultural soils and their.reference values by conducting further research in this region and including more type of soils.

关键词： Soil fertility Mediterranean agricultural soils Calcareous soils Soil enzymes Soil management

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Dynamic recrystallization behavior and microstructural evolution of Mg alloy AZ31 through high-speed rolling

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Journal of Materials Science & Technology 2018年第10期34卷 1747-1755页

作者： Jeong Hun Lee Jong un Lee Sang-Hoon Kim Seok Weon Song Chong Soo Lee Sung Hyuk Park Ulsan Regional Division Korea Institute of Industrial Technology School of Materials Science and Engineering Kyungpook National University Technical Research Laboratories POSCO Graduate Institute of Ferrous Technology Pohang University of Science and Technology

High-speed rolling （HSR） is known to improve the workability of Mg alloys significantly, which makes it possible to impose a large reduction in a single pass without fracture. In the present study, dynamic recrystallization （DRX） behavior and microstructural and textural variations of Mg alloy AZ31 dur-ing a HSR process were investigated by conducting rolling with different imposed reductions in the range of 20%-80% at a high rolling speed of 470 m/min and 400℃. High-strain-rate deformation during HSR suppresses dislocation slips but promotes twinning, which results in the formation of numer-ous twins of several types, i.e., {10-12} extension twins, {10-11} and {10-13} contraction twins, and {10-11}-{10-12} double twins. After twinning, high strain energy is accumulated in twin bands because their.crystallographic orientations are favorable for basal slips, leading to subsequent DRX at the twin bands. Accordingly, twinning activation and twinning-induced DRX behavior play crucial roles in accommodating plastic deformation during HSR and in varying microstructure and texture of the high- speed-rolled （HSRed） sheets. Area fraction of fine DRXed grains formed at the twin bands increases with increasing rolling reduction, which is attributed to the combined effects of increased strain, strain rate, and deformation temperature and a decreased critical strain for DRX. Size, internal strain, and texture intensity of the DRXed grains are smaller than those of unDRXed grains. Therefore, as rolling reduction increases, average grain size, stored internal energy, microstructural inhomogeneity, and basal texture intensity of the HSRed sheets gradually decrease owing to an increase in the area fraction of the DRXed grains.

关键词： Magnesium alloy High-speed rolling Twinning Dynamic recrystallization Microstructure

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Tailoring the optical and magnetic properties of La-BaM hexaferrites by Ni substitution

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Chinese Physics B 2022年第2期31卷 570-575页

作者： Hafiz T.Ali MRamzan M Imran Arshad Nicola A.Morley M.Hassan Abbas Mohammad Yusuf Atta Ur Rehman Khalid Mahmood Adnan Ali Nasir.Amin MAjaz-un-Nabi Department of Mechanical Engineering College of EngineeringTaif UniversityTaif 21944Saudi Arabia Department of Physics Government College UniversityFaisalabadPakistan Department of Materials Science and Engineering University of SheffieldSir Robert Hadfield BuildingMapping St.SheffieldS13JDUK Department of Clinical Pharmacy College of PharmacyTaif UniversityTaif 21944Saudi Arabia

We investigate the impact of Ni insertion on the structural,optical,and magnetic properties of Ba_(0.8)La_(0.2)Fe_(12-x)Ni_(x)O_(19)hexaferrites(Ni substituted La-BaM hexaferrites).Samples were prepared using the conventional co-precipitation method and sintered at 1000℃for 4 hours to assist the crystallization *** analysis of the structure of the samples was carried out using an x-ray diffraction(XRD)*** M-type hexagonal structure of all the samples was confir.ed using XRD *** lattice parameters a and c were found to be in the ranges of 5.8925±0.001 nm–5.8952±0.001 nm and 23.2123±0.001 nm–23.2219±0.001 nm,*** M-type hexagonal nature of the prepared samples was also indicated by the presence of corresponding FT-ir.bands and Raman modes in the FT-ir.and Raman spectra,*** results confir.ed the successful synthesis of the samples according to the requir.d stoichiometric ratio.A UV-vis spectrometer was used to record the absorption spectra of the prepared samples in the wavelength range of 200 nm–1100 *** optical energy bandgap of the samples was found to be in the range of 1.21 eV–3.39 *** M–H loops of the samples were measured at room temperature at an applied magnetic field range of 0 kOe–60 kOe.A high saturation magnetization of 99.92 emu/g was recorded in the sample with x=0 at a microwave operating frequency of 22.2 *** high value of saturation magnetization is due to the substitution of La3+ions at the spin-up(12k,2a,and 2b)*** Ni substitution is proven to be a potential candidate for the tuning of the optical and magnetic parameters of M-type ***,we suggest that the prepared samples are suitable for use in magneto-optic applications.

关键词： M-type hexaferrite nanostructured materials magnetic properties optical properties

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Synthesis,Crystal Structure and Spectroscopic Properties of 1,2-Benzothiazine Derivatives:An Experimental and DFT Study

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Chinese Journal of Structural Chemistry 2015年第1期34卷 15-25页

作者： MUHAMMAD Nadeem Arshad TARIQ Mahmood ATHER Faroque Khan MUHAMMAD Zia-Ur-Rehman ABDULLAH M.Asir. ISLAM Ullah Khan RIFFAT-un-Nisa KHURSHID Ayub AZAM Mukhtar MUHAMMAD Tariq Saeed Chemistry Department Faculty of ScienceKing Abdulaziz University Centre of Excellence for Advanced Materials Research (CEAMR) King Abdulaziz University Department of Chemistry COMSATS Institute of Information TechnologyAbbottabad ir.BM COMSATS Institute of Information Technology Applied Chemistry Research Center PCSIR Laboratories ComplexFerozpur RoadLahore 54600Pakistan Materials Chemistry Laboratory Department of ChemistryGC University Department of Chemistry College of ScienceKing Faisal University Department of Chemistry University of EducationOkara CampusOkara-Pakistan

1,2-Benzothiazine derivatives methyl 3-methoxy-4-oxo-3,4-dihydro-2H-benzo[e] [1,2]thiazine-3-carboxylate 1,1-dioxide（1） and methyl 2-ethyl-3-hydroxy-4-oxo-3,4-dihydro-2Hbenzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide（2） were synthesized, and characterized by spectroscopic techniques; 1H-NMR and infrared（ir. spectroscopy. Crystals of 1 and 2 were grown by slow evaporation of methanol and ethyl acetate, respectively and their.crystal structures were investigated by single-crystal X-ray diffraction analysis. Geometric properties were calculated by the B3 LYP method of density functional theory（DFT） at the 6-31G＋（d） basis set to compare with the experimental data. Simulated properties were found in strong agreement with the experimental ones. Intermolecular forces have also been modeled in order to investigate the strength of packing and strong hydrogen bonding was observed in both compounds 1 and 2. Electronic properties such as Ionization Potential（IP）, Electron Affinities（EA） and coefficients of the highest occupied molecular orbital（HOMO） and the lowest unoccupied molecular orbital（LUMO） of com- pounds 1 and 2 were simulated for the fir.t time.

关键词： 1,2-benzothiazine B3LYP/6-31+G (d) density functional theory (DFT) HUMO-LUMO crystal structures

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决定商业模式成败的能力因素探析

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科技进步与对策 2016年第17期33卷 79-84页

作者：刘亚军湘潭大学商学院湖南湘潭411105

商业模式运行以获得关键资源为起点,以创造最大客户价值为目标。企业在决定采用何种商业模式前,应首先识别备选模式在关键资源争夺及价值创造方面的优势和劣势,培育相应的能力以扬长补短。作为能够消除商业模式劣势(补短)的保健型能力,... 详细信息

商业模式运行以获得关键资源为起点,以创造最大客户价值为目标。企业在决定采用何种商业模式前,应首先识别备选模式在关键资源争夺及价值创造方面的优势和劣势,培育相应的能力以扬长补短。作为能够消除商业模式劣势(补短)的保健型能力,具有壁垒性、侧重竞争性和动态扩展性;而作为能够强化商业模式优势(扬长)的激励型能力,具有价值创造性、侧重创新性和动态聚焦性。企业拥有较强保健型能力不一定成功,但缺乏保健型能力一定会失败。反过来,企业缺乏激励型能力不一定会失败,但成功企业往往拥有较强的激励型能力。在商业模式运行过程中,企业只有同时拥有这两种能力,才能立于不败之地。厘清了关键资源和能力的概念,揭示了其对商业模式的影响机理,从正反两方面解释了导致商业模式成败的原因,并为研究基于商业模式的竞争战略打开了一个窗口。

关键词：商业模式保健型能力激励型能力

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Electrical Investigation of Some Silver Containing Ceramics Obtained from Coprecipitated Oxalates

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Journal of Materials Science & Technology 1999年第1期15卷 87-90页

作者： M.I.El-Hofy(Physics Department, Faculty of Science, Menoufia university, Shebin El-Kom, Egypt)A.M.Donia(Chemistry Department, Faculty of Science, Menoufia university, Shebin El-Kom, Egypt)M.M.Abou-Sekkina(Chemistry Department, Faculty of Science, Taota un Physics Department Faculty of Science Menoufia University Shebin El-Kom Egypt Chemistry Department Faculty of Science Menoufia University Shebin El-Kom Egypt Chemistry Department Faculty of Science Tanta University Tanta Egypt

Silver-ceramics (Ag2MO2)(M=Co, Ni, or Cu) were prepared through thermal decompositionof coprecipitated oxalates. Pellets of these materials were annealed at 350℃ for different timeperiods up to 5 h. The effect of ann... 详细信息

关键词： CuO Figure Electrical Investigation of Some Silver Containing Ceramics Obtained from Coprecipitated Oxalates

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Mn掺杂TiO_2负载竹质活性炭纤维的制备及可见光光催化性能研究

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功能材料 2015年第13期46卷 13121-13124,13129页

作者：马晓军田芝凡天津科技大学包装与印刷工程学院天津300222

采用溶胶-凝胶法和浸渍法制备Mn掺杂TiO2负载竹质活性炭纤维(Mn/Ti-BACF)光催化复合材料,利用扫面电镜(SEM)、X射线衍射仪(XRD)、傅立叶变换红外光谱(FT-ir.、紫外-可见光分光光度计(UV-Vis)等考察了Mn掺杂量对Mn/Ti-BACF复合材料结构... 详细信息

采用溶胶-凝胶法和浸渍法制备Mn掺杂TiO2负载竹质活性炭纤维(Mn/Ti-BACF)光催化复合材料,利用扫面电镜(SEM)、X射线衍射仪(XRD)、傅立叶变换红外光谱(FT-ir.、紫外-可见光分光光度计(UV-Vis)等考察了Mn掺杂量对Mn/Ti-BACF复合材料结构和可见光光催化性能的影响。结果发现,Mn掺杂改善了TiO2在竹质活性炭纤维表面的负载;Mn离子的掺杂并没有改变样品基材的碳网结构,也未出现新的Mn—O的特征吸收峰。随着Mn掺杂浓度的增加,Mn/Ti-BACF样品中TiO2粒径逐渐减小,可见光下的吸光度先增加后减少。当n(Mn)∶n(Ti)=1∶200时,样品在可见光下对亚甲基蓝的降解率达到了97.7%。

关键词： TiO2 Mn掺杂竹质活性炭纤维结构可见光光催化

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“依视路”杯全国法语文学翻译竞赛原文

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法语学习 2008年第1期 8-11页

作者： un PRSENT TERNEL

Lir. , c'est obir.à l'injonction des morts . Le texte littrair. cependant n'est pas la parole d'un sujet ,aujourd'hui disparu,et qui s'y serait conserve ;lir. n'est pas entendre :personne ne parle . Ne

关键词： “依视路”杯中国法语文学翻译竞赛原文文学翻译

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N,O-羧甲基壳聚糖树脂的制备及其对重金属吸附性能研究

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功能材料 2013年第21期44卷 3081-3084页

作者：宋磊党奇峰刘成圣于乐军张冉王玉杰于德君中国海洋大学海洋生命学院山东青岛266003

通过乳化交联法制备了一种新型的戊二醛交联N,O-羧甲基壳聚糖树脂,用SEM和FT-ir.树脂的表面结构和化学结构进行表征。用树脂吸附水溶液中的Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)等重金属离子,研究了不同pH值、接触时间和初始浓度对吸附量的影响。当p... 详细信息

通过乳化交联法制备了一种新型的戊二醛交联N,O-羧甲基壳聚糖树脂,用SEM和FT-ir.树脂的表面结构和化学结构进行表征。用树脂吸附水溶液中的Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)等重金属离子,研究了不同pH值、接触时间和初始浓度对吸附量的影响。当pH值=5时,树脂对Cu(Ⅱ)的吸附量达到最大值;当pH值=6时,对Pb(Ⅱ)和Cd(Ⅱ)的吸附量达到最大值。利用两种吸附等温线模型对数据进行拟合并对吸附动力学进行研究,实验数据对Langmuir.温线模型具有较高的拟合度,拟合后对Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)的最大吸附量分别为156.25、222.22和178.57mg/g,吸附过程符合拟二级反应动力学模型。

关键词： N ,O-羧甲基壳聚糖吸附 Cu(Ⅱ) Pb(Ⅱ) Cd(Ⅱ)

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