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First-Principles Study of Phase Stability and Mechanical Property of Co_3(Al,W) Precipitates with Different Ratio of Al to W in Co Base Alloys

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稀有金属材料与工程 2009年第A3期38卷 1-4页

作者： yao q Su X M yan y Zhao L W Sun J Shanghai Jiaotong University Shanghai 200240 China

The energetics, electronic structure and mechanical property of Co3(Al,W) precipitates with different ratio of Al to W in Co base alloys were investigated by the method of supercell and augmented plane waves plus local orbitals within generalized gradient approximation. The calculated results show that the L12 Co3(Al,W) precipitate is the most stable when the ratio of Al to W is equal to 1. When the content of W is higher than 18.5 at%, the L12 and hexagonal structures co-exist in Co3(Al,W) precipitates at 1173 K. It is also shown that the L12 ordered Co3(Al,W) precipitates have an obvious strengthening effect in the disordered fcc cobalt matrix.

关键词：铝电子结构力学性能碳酸

Wetting Behaviours of a Single Droplet on Biomimetic Micro Structured Surfaces

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Journal of Bionic Engineering 2010年第2期7卷 191-198页

作者： y.q.zu~1,y.y.yan~1,J.q.Li~2,Z.W.Han~2 1.Faculty of Engineering,University of Nottingham,Nottingham NG7 2RD,UK 2.Key Laboratory of Bionic Engineering (Ministry of Education,China),Jilin University,Changchun 130022,P.R.China Faculty of Engineering University of Nottingham Nottingham UK Key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University Changchun P. R. China

Natural surfaces with super hydrophobic properties often have micro or hierarchical *** this paper, the wettingbehaviours of a single droplet on biomimetic micro structured surfaces with different roughness parameters are *** model is proposed to study wetting *** results of theoretical analysis are compared with those of experimentindicating that the proposed model can effectively predict the wetting ***, a numerical simulationbased on the meso scale Lattice Boltzmann Method （LBM） is performed to study dynamic contact angles, contact lines, andlocal velocity fields for the case that a droplet displays on the micro structured surface.A spherical water droplet with r= 15 μmfalls down to a biomimetic square-post patterned surface under the force of gravity with an initial velocity of 0.01 m·sand aninitial vertical distance of 20 μm from droplet centre to the top of *** spite of a higher initial velocity, the droplet can stillstay in a Cassie state; moreover, it reaches an equilibrium state at t≈17.5 ms, when contact angle is 153.16° which is slightlylower than the prediction of Cassie-Baxter’s equation which gives θ=154.40°.

关键词： biomimetic wetting behaviours roughness surfaces contact angle wetting transition

Membrane skeleton spectrin in pollen and pollen tube

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Chinese Science Bulletin 1999年第10期44卷 930-933,961页

作者： yan Li Longfei yan S. y. Zee B. q. Huang China Agr Univ Coll Biol Sci Beijing 100094 Peoples R China Univ Hong Kong Dept Bot Hong Kong Peoples R China

Immuno-western blots, immunofluorescence and immuno-gold labeling methods were used to study the existence and distribution of a homologue of the membrane skeleton spectrin in the pollen and pollen tube of Lilium davidii Duch. A spectrin homologue was found to exist in the pollen and pollen tube, distributed on membranes of secretory vesicles near Golgi apparatus.

关键词： membrane skeleton spectrin immuno-blots and label pollen plant cell.

A　Conformational　Study　on　the　Interaction　of　Saporin-S6　with　Phospholipid　Vesicles

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Chemical Research in Chinese Universities 1998年第1期14卷 42-45页

作者： Hao, q Guan, ZH yan, L Zhang, y.y.n, GL Liu, GH Dong, qC Li, qS Wang, yZ Jilin Univ Dept Mol Biol Changchun 130023 Peoples R China Jilin Univ Natl Lab Enzyme Engn Changchun 130023 Peoples R China Peoples Hosp Jilin Prov Med Testing Dept Changchun 130021 Peoples R China

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关键词： Interaction the Phospholipid Saporin-S6

Synthesis and Characterization of a New Organic Up-conversion Laser Dye HMASPS

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Chinese Chemical Letters 2000年第5期11卷 395-398页

作者： Ren, y Fang, q yan, yX Wang, XM Liu, Z Zhou, Gy Wang, C Zhao, X Jiang, MH Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China

A new organic dye, trans-4-[4'-(N-hydroxyethyl-N-methylamino)sty.y.]-N-methylpyridinium p-toluene sulfonate (HMASPS) has been synthesized and its structure has been determined. Pumped with a 1064 nm, 50 ps laser pulses, 0.05 mol/L HMASPS/DMF solution showed the two-photon pumped (TPP) output/input efficiency of 8.4% which is higher than that of trans-4-[p-(N-hydroxyethyl-N-methylamino) sty.y.]-N-methylpyridinium iodide (ASPI)(1) at the same pump level.

关键词： C24H28N2O4S.H2O TPP up-conversion laser dye

High thermoelectric performance of ZrTe_(2)/SrTiO_(3) heterostructure

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Journal of Materiomics 2022年第3期8卷 570-576页

作者： Chun Hung Suen Long Zhang Kunya yang M.q.He y.S.Chai K.Zhou Huichao Wang X.y.Zhou Ji-yan Dai Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina College of Physics Chongqing UniversityChongqing401331China School of Physics Sun Yat-sen UniversityGuangzhou510275China

Achieving high thermoelectric pe rformance in thin fiIm heterostructures is essental for integrated and minlatured ther moelectric device *** this work,we d emonstrate a mechansm and device performance of enh anced themoelectnic perfomance induced by interfuclal effect in a tansitdon metal dichalcogenides SrTiO_(3)(STO)heterpstructure Owing to the fomed conductive interface and elevated *** ZrTe_(2)/STO he teras tructure presents large thermoelectric power factor of 3.7×10^(5)μWcm^(-1)K^(-2) at 10 *** ion of quasi-wo dimensional conductance at the interface s atributed for the lage Seebeck coffcent and high electnical conductivity leading to high thermoelectric perfor mance which is demonstrated by a prototype device attaining 3 K cooling with 100 mA current input to this heterostructure This supenior themoelectnic property makes this he teros tructure a promtsing candidate for future thermoelectric device.

关键词： Thermoelectric ZrTe_(2)thin film High mobility Interface Transition metal dichalcogenides

Structure and topological transport in Pb-doping topological crystalline insulator SnTe(001)film

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Journal of Materials Science & Technology 2020年第9期44卷 223-228页

作者： C.H.yan F.Wei y.Bai F.Wang A.q.Zhang S.Ma W.Liu Z.D.Zhang shenyang national laboratory for materials science institute of metal researchchinese academy of sciencesshenyang 110016china university of chinese academy of sciences beijing 100049china school of materials science and engineering university of science and technology of chinahefei 230026china

Topological crystalline insulator(TCI)as a new type of topological materials has attracted extensive research interests for its tunable topological *** its symmetry topological protection essence,the structure investigation provides a solid basement for tuning its topological transport *** SrTiO3(111)substrate,the SnTe film was found to be epitaxial growth only along[001]while not[111]*** detailed structural study was performed and a structural model was proposed to elucidate epitaxial growth of the SnTe(001)*** transport properties of SnTe(001)film were further investigated and a typical weak anti-localization effect was *** Pb-doping into SnTe,the bulk carriers were inhibited and its topological surface states were strengthened to induce the enhanced surface transport *** tunable multiple transport channels from the even Dirac cones,the TCI SnTe film systems will have the potential application in future spintronics devices.

关键词： Topological crystalline insulator Surface state SnTe

Improved mechanical properties in titanium matrix composites reinforced with quasi-continuously networked graphene nanosheets and in-situ formed carbides

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Journal of Materials Science & Technology 2022年第1期96卷 85-93页

作者： q.yan B.Chen L.Cao K.y.Liu S.Li L.Jia K.Kondoh J.S.Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China Joining and Welding Research Institution Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

In order to construct quasi-continuously networked reinforcement in titanium(Ti)matrix composites,in this study,Ti-6 Al-4 V spherical powders were uniformly coated with a graphene nanosheet(GNS)layer by high energy ball milling and then consolidated by spark plasma *** showed that the GNS layer on the powder surface inhibited continuous metallurgy bonding between powders during sintering,which led to the formation of quasi-networked hybrid reinforcement structure consisting of insitu Ti C and remained *** networked GNSs/Ti64 composite possessed noticeably higher tensile strength but similar ductility to the Ti64 alloy,leading to both better tensile strength and ductility than the GNSs/Ti composite with randomly dispersed GNSs and Ti *** formation mechanism and the fracture mechanism of the networked hybrid reinforcement were *** results provided a method to fabricate Ti matrix composites with high strength and good ductility.

关键词： Titanium matrix composites(TMCs) Graphene Network structure Strength Ductility

Dielectric relaxation of interfacial polarizable molecules in chitosan ice-hydrogel materials

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Journal of Materiomics 2018年第1期4卷 35-43页

作者： y.q.Li C.X.Zhang P.Jia y.Zhang L.Lin Z.B.yan X.H.Zhou J.-M.Liu Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China

The functionalities of hydrogel-based smart materials are highly related to the electrostatic interactions and molecular polarization associated with the polymer networks and encapsulated water droplets,and therefore the dielectric responses of the polarizable molecules in the polymer,water,and polymer-water interfaces are particularly attractive,where the properties of polymer-water interfacial molecules remain *** from extensive dielectric relaxation spectroscopy studies on polymer hydrogel solutions,in this work we investigate the dielectric response of chitosan hydrogels below the water solidifying point(ice-hydrogels)so that the contribution of chitosan-water interfacial molecules can be *** is revealed that the chitosan-water interfacial polarizable molecules have slow dielectric relaxation but large polarization compared with the chitosan chains and water molecules,and the dielectric relaxations beyond~10^(4)Hz are substantially *** thermal activation energy of the dielectric relaxation for these interfacial polarizable molecules can be as large as 0.93 eV,i.e.89.73 kJ/*** present work provides a platform for characterizing the polymer-water electrostatic interactions and interfacial polarizable molecules,informative to understand the microstructure-property relationships of chitosan-based hydrogel materials.

关键词： Chitosan hydrogels Dielectric relaxation Polymer-water interfacial polarizable molecules Thermal activation energy