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In-situ growth and photoluminescence of β-Ga_2._3 cone-like nanowires on the surface of Ga substrates

Science china(Technological Sciences) 2009年第6期52卷 1712-1721页

作者： LIU RuiNi1,YANG HeQing1,ZHANG RuiGang1,DONG HongXing1,CHEN XiaoBo1,LI Li1,ZHANG LiHui1,MA JunHu1 & ZHENG HaiRong2.1 key laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry and {2. Science,Shaanxi Normal university,Xi’an 710062.china 2.School of Physics & Information Technology,Shaanxi Normal university,Xi’an 710062.china 1. key laboratory of Macromolecular Science of Shaanxi Province School of Chemistry and Materials Science Shaanxi Normal University Xi’an 710062 China 2. School of Physics & Information Technology Shaanxi Normal University Xi’an 710062 China

β-Ga2.3 cone-like nanowires have been in-situ grown on the surface of gallium grains and films by heating gallium substrates at 750-1000℃ for 2. in *** controllable synthesis of β-Ga2.3 nano-wires with different diameters and lengths was achieved by adjusting the heating temperature and *** as-synthesized products were characterized by means of X-ray diffraction,scanning electron mi-croscopy and transmission electron *** results showed that the β-Ga2.3 nanowires are single crystalline with a monoclinic structure and have a controllable diameter and length in the range of 30-100nm and 0.5-1.5μm,respectively.A possible mechanism was also proposed to account for the formation of β-Ga2.3 cone-like *** spectra of the β-Ga2.3 nanowires obtained at different temperatures were measured at room temperature,and a strong blue photolumi-nescence with peaks at 430 and 460nm and a weak red photoluminescence with peak at 713nm were *** blue light emission intensity decreases with increasing the reaction temperature,how-ever,the red light emission intensity hardly *** blue and red light emissions originate from the recombination of an electron on an oxygen vacancy with a hole on a gallium-oxygen vacancy pair and the nitrogen dopants,etc.,respectively.

关键词： β-Ga2.3 cone-like nanowires photoluminescence in-situ growth

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Molecular dynamics simulation study on zwitterionic structure to maintain the normal conformations of Glutathione

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Science china Chemistry 2007年第5期50卷 660-664页

作者： YAN Han1, ZHU HaoMiao2.& SHEN Jian1,2.1 Jiangsu Research Center of Surface and Interface Chemical Engineering and Technology, Nanjing university, Nanjing 2.0093, china 2.Jiangsu Engineering Research Center for Bio-medical function {2., Nanjing Normal university, Nanjing 2.0097, china Jiangsu Research Center of Surface and Interface Chemical Engineering andTechnology Nanjing UniversityNanjing 210093China Jiangsu Engineering Research Center forBio-medical function materials Nanjing Normal UniversityNanjing 210097China

Molecular dynamics simulations were applied to normal conformational Glutathione (GSH) and GSH over zwitterionic and hydrophobic surfaces respectively. Conformational analysis of GSH during the simulation time on RMSD, conformational flexibility and dihedral distribution were performed. The re- sults showed that zwitterionic structure maintains the normal conformations of GSH to a better extent, which should be a first good proof of the hypothesis of "maintain of normal structure".

关键词： protein-surface interactions, molecular dynamics simulation, zwitterionic structure, Glutathione, conformational changes, antithrombotic material

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structure, spin reorientation and Mssbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys

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Science china(Physics,Mechanics & Astronomy) 2006年第2期Mechanics & Astronomy) .卷 149-157页

作者： ZHENG Xiaoping1,2.4, ZHANG Peifeng1,3, FAN Duowang1, LI Fashen3 & HAO Yuan41. key laboratory of Opto-Electronic Technology and Intelligent Control, {2. of education, Lanzhou Jiaotong university, Lanzhou 730070, china 2. Institute of Electronic Information Science and Technology,Lanzhou Teachers College, Lanzhou 730070, china 3. key laboratory for Magnetism and Magnetic materials, {2. of education, Lanzhou university, Lan-zhou 730000, china 4. State key Lab. of Advanced Non-Ferrous materials, Gansu Province, Lanzhou university of Technology, Lanzhou 730050, china

The effect of Al substitution for Fe on crystal structure, magnetostriction and spontaneous magnetostriction, anisotropy and spin reorientation of a series of polycrys-talline Tb0.3Dy0.7(Fe1?xAlx)1.95 alloys (x = 0, 0.05, 0.1, 0.15, 0.2., 0.2., 0.30, 0.35) at room temperature and 77 K was investigated systematically. It was found that the primary phase of Tb0.3Dy0.7(Fe1?xAlx)1.95 is the MgCu2.type cubic Laves phase structure when x 0.15 at room temperture, but at 77 K the alloys still remain magnetic phase even for x = 0.2. At room temperature and 77 K, the hyperfine field de-creases and the isomer shifts increase with Al concentration increasing.

关键词： magnetostriction cubic Laves phase spin reorientation M?ssbauer.

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Spatial and temporal variations of macro-and mesozoo-plankton community in the Huanghai Sea (Yellow Sea) and East china Sea in summer and winter

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Acta Oceanologica Sinica 2011年第2期30卷 84-95页

作者： CHEN Hongju QI Yanping LIU Guangxing key laboratory of Marine Environment and Ecology Ministry of Education OceanUniversity of China Qingdao 266100 China

The study was conducted during two cruises of June–August 2.06 （summer）,and January–February 2.07 （winter） in the Huanghai （Yellow） Sea and East china *** and temporal variations of zooplankton abundance,biomass and community structure and its relation to currents and water masses over the continental shelf were examined.A total of 584 zooplankton species/taxa and 2. planktonic larvae were identified during the two *** were the most abundant component among these identified *** abundance and biomass fluctuated widely and showed distinct heterogeneity in the shelf *** zooplankton assemblages were identified with hierarchical cluster analysis during this study,and they were Huanghai Sea Assemblage,Changjiang Estuary Assemblage,Coastal Assemblage,East china Sea Mixed-water Assemblage and East china Sea Offshore *** changes of zooplankton community composition and its geographical distribution were detected,and the locations of the faunistic areas overlap quite well with water masses and current *** we suggest that the zooplankton community structure and its changes were determined by the water masses in the Huanghai Sea and East china *** results of this research can provide fundamental information for the long-term monitoring of zooplankton ecology in the shelf of Huanghai Sea and East china Sea.

关键词： zooplankton abundance biomass community structure the Huanghai Sea (Yellow Sea) the East china Sea

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Effect of Annealing Temperature on the Ferroelectric Properties of BiFeO_3 Thin Films Prepared by Sol-gel Process

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Journal of Wuhan university of Technology(materials Science) 2010年第3期25卷 384-387页

作者：王秀章 Hubei key laboratory of Pollutant Analysis & Reuse Technology School of Computer Science and Technology Huangshi Institue of Technology

Sol-gel process was adopted to prepare BiFeO3 ***3 films were deposited on LaNiO3 coated Si（100） substrates annealed at 500 and 550 ℃,*** X-ray diffraction results reveal that BiFeO3 film has a rhombohedrally distorted perovskite structure with space group *** film annealed at 500 ℃ has larger remnant polarization（Pr） of 35.3 μC/*** the film annealed at 550 ℃,smaller remnant polarization of Pr=4.8 μC/cm^2.is observed for its low breakdown electric *** leakage conduction is observed in the film annealed at 500 ℃ at low applied field.

关键词： multiferroics BiFeO3 thin film sol-gel method ferroelectricity dielectric property

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松辽盆地北部姚家组底界面特征及其动力学背景

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石油学报 2010年第2期31卷 187-195页

作者：宋鹰任建业阳怀忠佟殿君雷超中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中国地质大学资源学院湖北武汉430074 教育部含油气盆地构造研究中心中国地质大学分中心湖北武汉430074

以松辽盆地北部地震资料精细构造解释和钻井资料分析为基础,对其姚家组底界面特征展开了详细的研究。结果表明:在该界面之下的地层内发育了4组近NNE走向长距离延伸的微幅褶皱带,并且这4组褶皱带的隆起幅度由东向西逐渐减小;沿该界面发... 详细信息

以松辽盆地北部地震资料精细构造解释和钻井资料分析为基础,对其姚家组底界面特征展开了详细的研究。结果表明:在该界面之下的地层内发育了4组近NNE走向长距离延伸的微幅褶皱带,并且这4组褶皱带的隆起幅度由东向西逐渐减小;沿该界面发育了东薄西厚的红色古土壤层;古生物资料也显示界面上下有明显的物种组合突变现象。地球物理、沉积、古生物等证据揭示,姚家组底界面是发育在盆地裂后热沉降期内的一个具有挤压背景的区域性角度不整合面。磁性地层、古生物和同位素年龄均显示该界面的发育时代为晚白垩纪(距今约88.5Ma),与中生代期间欧亚板块与太平洋板块间一次重大的板块构造运动学重组事件一致。由此推断,松辽盆地北部姚家组底界面是晚白垩纪板块构造重组事件在松辽盆地内的响应界面,至此开始,松辽盆地进入了构造反转演化阶段。

关键词：松辽盆地姚家组底界面板内应力构造反转晚白垩纪板块构造

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六硼化钙纳米粉末的吸收光谱研究(英文)

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山东大学学报（工学版） 2009年第1期39卷 118-121页

作者：梁丽梅张琳闵光辉山东大学材料液态结构及其遗传性教育部重点实验室山东济南250061

采用CaCl2.and NaBH4为原料低温合成CaB6纳米粉末.X射线衍射结果表明生成了CaB6晶体.场发射扫描电镜(FESEM)观测到粉末由接近立方体的平均粒径为80nm的小晶粒组成,有轻微团聚现象.高分辨透射电镜(HR-TEM)表明纳米颗粒为单晶,这一发现与... 详细信息

采用CaCl2.and NaBH4为原料低温合成CaB6纳米粉末.X射线衍射结果表明生成了CaB6晶体.场发射扫描电镜(FESEM)观测到粉末由接近立方体的平均粒径为80nm的小晶粒组成,有轻微团聚现象.高分辨透射电镜(HR-TEM)表明纳米颗粒为单晶,这一发现与XRD和FESEM的结果相对应,且观察到晶体是以结晶良好的CaB6为芯,外面包覆着厚约4～5nm的非晶层.CaB6纳米粉末的光学性能是通过傅立叶红外光谱和紫外-可见-近红外光谱来表征的,同时做CaB6微米粉末的光谱用以比较.与微米粉末仅有微弱的吸收带相比,纳米粉末的光谱出现明显的宽化和红移现象,这与晶格膨胀和纳米效应有关.紫外-可见-近红外光谱中,微米粉末几乎没有吸收,纳米粉末可吸收紫外线,并出现蓝移现象.总之,CaB6纳米粉末在紫外-中红外波段总有吸收,特别是在中红外区,吸收强度远大于微米粉末.

关键词：六硼化钙纳米粉末高分辨透射电镜吸收光谱

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EFFECT OF MOLECULAR WEIGHT OF PEO ON THE structure AND PROPERTIES OF PDMAEMA/PEO HYDROGELS

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Chinese Journal of Polymer Science 2006年第1期24卷 35-40页

作者： Zhu-gen Liu Min Yi Mao-lin Zhai and Hong-fei Ha Department of Applied Chemistry and The key laboratory of Polymer Chemistry and Physics of {2. of education,College of Chemistry & Molecular Engineering,Peking university,Beijing 100871,china Peking Univ Coll Chem & Mol Engn Dept Appl Chem Beijing 100871 Peoples R China Peking Univ Coll Chem & Mol Engn Minist Educ Key Lab Polymer Chem & Phys Beijing 100871 Peoples R China

A new kind of binary hydrogels composed of poly（dimethylaminoethylmethacrylate）（PDMAEMA） and poly（ethylene oxide）（PEO） with varying weight average molecular weights （M^-w = 5 × 10^4, 1 × 10^5 and 2.5 × 10^6） were prepared by У-irradiation technology. The properties of PDMAEMA/PEO hydrogels obtained were evaluated in terms of gel fraction, gel strength, thermal characterization and swelling behavior. The gel strength and swelling degree of the hydrogels could be improved obviously after adding PEO into the PDMAEMA system, while the degree of improvement decreased with increasing M^-w of PEO. The temperature sensitivity of PDMAEMA/PEO was retained only in the sample with PEO of M^-w = 5 × 10^4, and the pH sensitivity was retained in samples with PEO of M^-w = 5 × 10^4 and 1 × 10^5. When DMAEMA/PEO mixtures containing PEO of M^-w = 5 × 10^4 were irradiated, the main reaction could be the cross-linking of DMAEMA, and the linear PEO molecular chains could penetrate into the cross-linked network of PDMAEMA. With increasing M^-w of PEO, some side reactions were induced, such as grafting of DMAEMA onto PEO molecules, the scission or cross-linking of PEO.

关键词： Poly(dimethylaminoethylmethacrylate) Poly(ethylene oxide) Molecular weight Binary hydrogels Irradiation.

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The radio structure of BL Lac object S5 2.07+777

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Science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 187-190页

作者： WU ZhongZu1,3,GU MinFeng2.& CHEN YongJun2.1 College of Science,Guizhou university,Guiyang 55002.,china 2.{2. laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 2.0030,china 3 NAOC-GZU Sponsored Center for Astronomy,Guizhou university,Guiyang 55002.,china Guizhou Univ Coll Sci Guiyang 550025 Peoples R China Chinese Acad Sci Shanghai Astron Observ Key Lab Res Galaxies & Cosmol Shanghai 200030 Peoples R China Guizhou Univ NAOC GZU Sponsored Ctr Astron Guiyang 550025 Peoples R China

BL Lac object S5 2.07+777 has been classified as a HYMOR(Hybrid Morphology radio source) for its hybrid FR I and FR II radio *** is one of four BL Lac objects with a kpc scale extended X-ray *** this paper,we searched the unpublished European VLBI Network(EVN) archived high resolution data for this source,and present the high resolution radio *** EVN images all show a core-jet structure in 1.6,5 and 8 *** combination with the VLA data in the literature,we found position angle differences(△PA) of about 10°-2.° between pc and kpc scale jet *** brightness temperature estimated from multi-band EVN images are around 1011.2.1011.8 K,from which the Doppler factor ranges from 3.2.to *** found significant flux variations of the radio core in 1.6 and 5 GHz,from which we derived the variability in brightness temperature Tvar to be 1013.6 K and 1014.0 K,corresponding to the Doppler factors of 9.3 and 12.4,respectively.

关键词： active galactic nuclei VLBI BL Lac objects

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Molecular hosts for triplet emitters in organic light-emitting diodes and the corresponding working principle

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Science china Chemistry 2010年第8期53卷 1679-1694页

作者： MI BaoXiu1,2.GAO ZhiQiang1,LIAO ZhangJin2.HUANG Wei2.& CHEN Chin Hsin3 1Jiangsu Engineering Center for Flat-Panel Displays & Solid-State Lighting School of materials Science & Engineering,Nanjing university of Posts & Telecommunications,Nanjing 2.0046,{2. 2.3} laboratory for Organic Electronics & Information Displays (KLOEID),Institute of Advanced materials (IAM),Nanjing university of Posts & Telecommunications,Nanjing 2.0046,{2. 3Display Institute,Microelectronics and Information Systems Research Center,National Chiao Tung university Hsinchu,Hsinchu,300 {2. 1. Jiangsu Engineering Center for Flat-Panel Displays & Solid-State Lighting School of materials Science & Engineering Nanjing University of Posts & Telecommunications Nanjing 210046 China2. Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing 210046 China3. Display Institute Microelectronics and Information Systems Research Center National Chiao Tung University Hsinchu Hsinchu 300 China

This paper summarizes the mechanism and routes for excitation of triplet emitters in dopant emission based phosphorescent organic light-emitting diodes (PhOLEDs),providing a comprehensive overview of recent progress in molecular hosts for triplet emitters in ***,based on the nature of different hosts,e.g.,hole transporting,electron transporting or bipolar materials,in which the dopant emitters can be hosted to generate phosphorescence,the respective device performances are summarized and *** are given to the relationships among the molecular structure,thermal stability,triplet energy,carrier mobility,molecular orbital energy level and their corresponding device performances.

关键词： phosphorescent organic light-emitting diodes (OLEDs) working principle electrophosphorescence hosts triplet emitter

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