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Sign-reversible valley-dependent Berry phase effects in 2D valley-half-semiconductors

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npj Computational Materials 2021年第1期7卷 1435-1441页

作者： Xiaodong Zhou Run-Wu zhang zeying zhang Wanxiang Feng Yuriy Mokrousov Yugui Yao Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of Technology100081 BeijingChina Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of Technology100081 BeijingChina College of Mathematics and Physics Beijing University of Chemical Technology100029 BeijingChina Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARA52425 JülichGermany Institute of Physics Johannes Gutenberg University Mainz55099 MainzGermany

Manipulating valley-dependent Berry phase effects provides remarkable opportunities for both fundamental research and practical ***,by referring to effective model analysis,we propose a general scheme for realizing topological magneto-valley phase *** importantly,by using valley-half-semiconducting VSi2N4 as an outstanding example,we investigate sign change of valley-dependent Berry phase effects which drive the change-in-sign valley anomalous transport characteristics via external means such as biaxial strain,electric field,and correlation *** a result,this gives rise to quantized versions of valley anomalous transport *** findings not only uncover a general framework to control valley degree of freedom,but also motivate further research in the direction of multifunctional quantum devices in valleytronics and spintronics.

关键词： Berry phase reversible

Synthesis and Crystal Structure of 4,6Di-tert-butyl-2-hydroxy-3-(N-1-phenylethyliminomethyl) phenyl bis(triphenylphosphine)palladium bromide

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Chinese Journal of Structural Chemistry 1999年第4期18卷 54-59页

作者： XU JiaXi\ zhang zeying\= (College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China) Coll. of Chem. and Molec. Eng. Peking University Beijing 100871 China

１ＩＮＴＲＯＤＵＣＴＩＯＮＰａｌａｄｉｕｍｃｏｍｐｌｅｘｅｓｓｕｃｈａｓｔｅｔｒａｋｉｓ（ｔｒｉｐｈｅｎｙｌｐｈｏｓｐｈｉｎｅ）ｐａｌａｄｉｕｍａｒｅａｋｉｎｄｏｆｉｍｐｏｒｔａｎｔｃａｔａｌｙｓｔｓｉｎｔｈｅｒｅａ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＰａｌａｄｉｕｍｃｏｍｐｌｅｘｅｓｓｕｃｈａｓｔｅｔｒａｋｉｓ（ｔｒｉｐｈｅｎｙｌｐｈｏｓｐｈｉｎｅ）ｐａｌａｄｉｕｍａｒｅａｋｉｎｄｏｆｉｍｐｏｒｔａｎｔｃａｔａｌｙｓｔｓｉｎｔｈｅｒｅａｃｔｉｏｎｏｆｃａｒｂｏｎｃａｒ...

关键词： palladium complex synthesis molecular structure crystal structure

Transpiration-inspired Capillary for Synchronous Synthesis and Patterning of Silver Nanoparticles

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Chemical Research in Chinese Universities 2023年第1期39卷 133-138页

作者： CHEN Bingda zhang Zelong SU Meng QIN Feifej PAN Qi XIE Daixi YANG Xu zhang Kun zhang zeying XIE Hongfei CARMELIET Jan SONG Yanlin Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences(BNLMS)Beijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Institute of Extreme Mechanics and School of Aeronautics Northwestern Polytechnical UniversityXi’an710072P.R.China Chair of Building Physics Department of Mechanical and Process EngineeringETH ZürichZürich8092Switzerland

Traditional synthesis strategy of nanomaterials with complicated process and high cost limits their ***,we propose a facile process for the synchronous synthesis and patterning of silver nanoparticles(Ag NPs)through the self-driven microchannel reactor with the capillary effect inspired by *** evaporation contributes to capillary and accumulation effects in the *** silver reactant-containing droplets can be spontaneously divided and distributed in multiple microchannels during the whole fabrication process by the capillary *** newly formed Ag NPs at the gas-liquid interface can be assembled on both sides of the microchannels by the accumulation *** capillary effect decreases the disturbances,which ensures the uniformity of the *** the combination of microchannels with different widths,various Ag NPs-assembled patterns with stable electrical properties are *** efficient strategy with a simple fabrication procedure is towards the technological engineering of nanoscale architected materials.

关键词： Transpiration Capillary effect Droplet manipulation Nanoparticle Patterning

民办高校基于有组织科研背景下科研管理制度的创新研究

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江苏科技信息 2024年第12期41卷 1-3,9页

作者：张泽英连素娟严碧云黄爱妮武昌工学院湖北武汉430065

民办高校作为我国高等教育事业的重要组成部分,发挥着重要作用,其科研水平的高低在一定程度上影响着区域、地方经济建设与社会发展。民办高校在谋求科研可持续发展的进程中越来越深刻地意识到,有组织科研是提高科技创新能力、提升人才... 详细信息

民办高校作为我国高等教育事业的重要组成部分,发挥着重要作用,其科研水平的高低在一定程度上影响着区域、地方经济建设与社会发展。民办高校在谋求科研可持续发展的进程中越来越深刻地意识到,有组织科研是提高科技创新能力、提升人才培养质量的重要途径。但民办高校在科研管理方面仍存在诸多问题,如科研项目质量不高、科研成果转化困难等,严重阻碍了有组织科研活动。文章旨在探讨有组织科研背景下,民办高校科研管理制度存在的问题以及创新途径,以期为民办高校的科研发展提供参考。

关键词：有组织科研科研管理制度民办高校

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中国第一座充水式橡胶坝运行应用分析

黑龙江水利科技 2024年第10期52卷 110-114页

作者：时连仲张泽颖王雪昆杨凯崴金泽北京市城市河湖管理处北京100041

北京市右安门橡胶坝建成于1966年,是新中国第一座充水式橡胶坝。它为北京核心城区防汛、供水、水环境等方面做出了极其重要的贡献。文章梳理右安门橡胶坝建设、历次维修、运行管理等方面情况,回顾右安门橡胶坝近60a的发展历程。

关键词：右安门橡胶坝坝袋更新防汛供水橡胶坝运行管理

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基于协同学理论的高校“四育”综合育人模式探索

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科学咨询(教育科研) 2024年第5期 13-16页

作者：幸姚李顺江晓明张泽英李卉连素娟武昌工学院创新创业学院

高校“四育”综合育人模式是指将创新创业创造教育、思想政治教育、专业教育、科学研究育人4个方面有机结合，培养学生全面发展的教育理念和实践模式。经过多年的发展，我国“四育”各个维度的研究已经初见成效，但是“四育”综合研究... 详细信息

高校“四育”综合育人模式是指将创新创业创造教育、思想政治教育、专业教育、科学研究育人4个方面有机结合，培养学生全面发展的教育理念和实践模式。经过多年的发展，我国“四育”各个维度的研究已经初见成效，但是“四育”综合研究得较少，面对的问题仍然较为复杂，鉴于我国高校“四育”综合育人系统的开放性、非平衡状态等特性与协同学理论契合度较高，本文运用协同学理论，通过文献研究和实地调研对“四育”协同育人模式进行探索，为高校教育改革提供新的思路和方向。

关键词： “四育”协同创新创业创造教育协同学理论

One droplet reaction for synthesis of multi-sized nanoparticles

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Nano Research 2023年第4期16卷 5850-5856页

作者： Bingda Chen Feifei Qin Meng Su Daixi Xie zeying zhang Qi Pan Huadong Wang Xu Yang Sisi Chen Jingwei Huang Dominique Derome Jan Carmeliet Yanlin Song Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences(BNLMS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Chair of Building Physics Department of Mechanical and Process EngineeringETH Zürich(Swiss Federal Institute of Technology in Zürich)Zürich 8092Switzerland Department of Civil and Building Engineering Universitéde SherbrookeSherbrooke QC J1K 2R1Canada

Reaction kinetics of nanoparticles can be controlled by tuning the Peclet number(Pe)as it is an essential parameter in synthesis of multi-sized ***,we propose to implement a self-driven multi-dimension microchannels reactor(MMR)for the one droplet synthesis of multi-sized *** carefully controlling the Pe at the gas-liquid interface,the newly formed seed crystals selectively accumulate and grow to a specific *** the combination of microchannels of different widths and lengths,one droplet reaction in the same apparatus achieves the synchronous synthesis of diverse *** enables precise control of nanoparticle diameter at 5 nm precision in the range of 10-110 *** use of MMR can be extended to the synthesis of uniform Ag,Au,Pt,and Pd nanoparticles,opening towards the production and engineering of nanostructured *** approach gives the chance to regulate the accumulation probability for precise synthesis of nanoparticles with different diameters.

关键词： gas-liquid interface accumulation effect one droplet reaction multi-sized nanoparticles

CRYSTAL AND MOLECULAR STRUCTURE OF NATURAL PRODUCT TOXOCAHOL

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结构化学 1987年第2期 128-131页

作者： zhang zeying zhang MingzheDepartment of Chemistry, Peking University

Toxocarol C6H12O4 is a separated product from the plant of Toxocarpus (himalensis Falc. ex Hook. f.). It crystallizes in orthorhombic, the space group D2h-Pnca with a= 10.129(2), b= 11.297(3), c= 11.814(3)A, V=1351.9 A3, Z=8, Dc= 1.46 ***-3; m.p= 150.5°-151.5℃,μ(Mo)=1.3 cm-1. The result of structure analysis shows that the compound is a chair cyclohexan-tetrol .There is a complex net of hydrogen bonds in the crystal.

关键词： CRYSTAL AND MOLECULAR STRUCTURE OF NATURAL PRODUCT TOXOCAHOL

STRUCTURE OF ALKALOID WILFORGINE, C41H47NO19 2C2H5OH

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Chinese Journal of Structural Chemistry 1986年第2期 83-86页

作者： zhang zeying zhang Mingzhe Zheng Xuecheng Department of Chemistry, Beijing University

INTRODUCTION. Tripterygium hypoglaucum(Levl)Hutch growing in Hunan,Guangxi,Yunan and Guizhou provinces of China is a plant used as a medicinetreating rheumarthritis. All alkaloids contained within this plant arecharacterzed by antiinflammatory and analgetic. Using column partitionchromatography of silica gel, we have separated out the wilforine and wilforgine from root of this plant.

关键词： STRUCTURE OF ALKALOID WILFORGINE OH NO