Now showing items 1517-1536 of 2359

    • Waist cross-linked micelles synthesized via self-assembly guiding radical polymerization 

      Yuan, C. H.; Xu, Y. T.; Deng, Y. M.; Chen, J. F.; Liu, Y. L.; Dai, L. Z.; 戴李宗 (2009)
      Amphiphilic micelles with waist cross-linked structure exhibit both core-shell reversing behavior and thermal sensitivity.
    • What makes spider silk fibers so strong? From molecular-crystallite network to hierarchical network structures 

      Xu, Gangqin; Gong, Li; Yang, Zhen; Liu, X. Y.; 刘向阳 (ROYAL SOC CHEMISTRY, 2014)
      A Hierarchical Network (HN) model of soft matter was put forward to explain the mechanical properties of animal silk fibers. At the nano-micro level, the silk fibers consist of a bundle of twisted nano-fibrils with strong ...
    • White spot syndrome virus VP24 interacts with VP28 and is involved in virus infection 

      Xie, Xixian; Yang, Feng; 杨峰 (J GEN VIROL, 2006-07)
      White spot syndrome virus (WSSV) is one of the most virulent pathogens causing high mortality in shrimp. Herein, the characterization of VP24, a major structural protein of WSSV, is described. When purified virions were ...
    • Wireless passive polymer-derived SiCN ceramic sensor with integrated resonator/antenna 

      Li, Yan; Yu, Yuxi; San, Haisheng; Wang, Yansong; An, Linan; 余煜玺; 伞海生 (AMER INST PHYSICS, 2013-Oct 1)
      This paper presents a passive wireless polymer-derived silicon carbonitride (SiCN) ceramic sensor based on cavity radio frequency resonator together with integrated slot antenna. The effect of the cavity sensor dimensions ...
    • Working Pressure Induced Microstructure and Stress Evolution of Sputtered ZrN Coatings 

      Qi Zhengbing; Yan Weili; Hong Jinqing; Zhu Fangping; Sun Peng; Wang Zhoucheng; Wu Zhengtao; Peng Dongliang; Wu Chonghu; 彭栋梁 (2012-02)
      The influence of working pressure on microstructure and residual stress evolution of magnetron sputtered ZrN coatings were systemically investigated. XPS and XRD results reveal that all as-deposited coatings at varying ...
    • X-ray diffraction and X-ray photoelectron spectra of Fe-Cr-N films deposited by DC reactive sputtering 

      Peng, D. L.; Sumiyama, K.; Oku, M.; Konno, T. J.; Wagatsuma, K.; Suzuki, K.; 彭栋梁 (1999)
      The effects of nitrogen flow ratio, target area ratio of Cr, and substrate temperature on the structure of DC reactive sputtered Fe-Cr-N ternary films have been studied. X-ray diffraction measurements show that Fe-Cr-N ...
    • YAG荧光粉-无铅低软化温度玻璃复合浆料的制备与应用 

      杜振波; 杨乐; 吴儒雅; 李郎楷; 范尚青 (2018-09-21)
      为优化大功率白光LED的封装过程,提出将YAG荧光粉-无铅低软化温度玻璃复合浆料印刷在玻璃基片上,经热处理制备荧光玻璃片的技术方案。采用热膨胀仪、粉末衍射仪、热重分析仪、荧光光谱仪等研究无铅低软化温度玻璃成分与热学性能的关系,无铅低软化温度玻璃粉与YAG荧光粉的配比、固含量、热处理制度等因素对复合浆料及荧光玻璃片晶型、粘度及发光等性能的影响。结果表明,复合浆料固含量为70%时,粘度适用于丝网印刷;印刷后的玻璃基片在550~650℃温度下 ...
    • Yolk-shell ZnO-C microspheres with enhanced electrochemical performance as anode material for lithium ion batteries 

      Xie, Qingshui; Zhang, Xiaoqiang; Wu, Xiaobiao; Wu, Huayi; Liu, Xiang; Yue, Guanghui; Yang, Yong; Peng, Dong-Liang; 岳光辉; 杨勇; 彭栋梁 (PERGAMON-ELSEVIER SCIENCE LTD, 2014-04-10)
      Three ZnO-C samples with distinct structures including yolk-shell microspheres, hollow microspheres and solid microspheres are fabricated through a facile chemical solution reaction followed by calcination in argon. When ...
    • Young's double-slit experiment using core-level photoemission from N2: revisiting Cohen–Fano's two-centre interference phenomenon 

      X-J Liu; 刘兴军; N A Cherepkov; S K Semenov; V Kimberg; F Gel’mukhanov; G Pr¨umper; T Lischke; T Tanaka; M Hoshino; H Tanaka; K Ueda (IOP Publishing Ltd, 2006)
      The core-level photoelectron spectra of N-2 molecules are observed at high energy resolution, resolving the 1 sigma(g) and 1 sigma(u) components as well as the vibrational components in the extended energy region from the ...
    • Young's double-slit experiment using two-center core-level photoemission 

      Liu, X. J.; Prumper, G.; Gel'mukhanov, F.; Cherepkov, N. C.; Tanaka, H.; Ueda, K.; 刘兴军 (2007-05)
    • Young's double-slit experiment using two-center core-level photoemission: Photoelectron recoil effects 

      Gel'mukhanov, F.; Kimberg, V.; Liu, X. J.; Prumper, G.; Tanaka, T.; Hoshino, M.; Tanaka, H.; Ueda, K.; 刘兴军 (2007-05)
      Core-level photoemission from N-2 can be considered an analogue of Young's double-slit experiment (YDSE) in which the double-slit is replaced by a pair of N 1s orbitals. The measured ratio between the 1 sigma(g) and 1 ...
    • Y和Gd在Mg中反常固溶强化行为的电子起源:第一性原理计算研究 

      高磊; 周健; 孙志梅; 陈荣石; 韩恩厚 (2010-08-05)
      Y和Gd在Mg中表现出反常高的固溶强化效率,这一现象与传统的弹性交互作用理论相矛盾.采用第一性原理计算研究了不同合金元素Al,Zn,Y,Gd对Mg固溶体中化学键的影响.结果表明,Y和Gd在Mg中反常固溶强化行为的主要原因是Mg-Y(Gd)和Mg-Mg化学键的增强.
    • Zn-Na2CO3复合改性HZSM-5在线催化生物质热解制备芳烃 

      郑云武; 沈华杰; 王继大; 李文斌; 王珍; 郑志锋 (2019-06-28)
      为进一步提高芳烃的产率,减少催化剂的失活,采用Zn和Na2CO3对HZSM-5催化剂复合改性,探讨了Zn的负载量对生物质催化热解气相重整制备芳烃的产率、选择性以及抗结焦性能的影响,同时采用XRD、BET、NH3-TPD以及SEM对反应前后催化剂进行表征。结果表明:ZnNa2CO3复合改性没有改变HZSM-5晶体骨架结构,Zn均匀的负载在催化剂的表面,比表面积随着Zn的负载量的增加而减少,孔径随着Zn的负载量的增加而加大;改性Zn-Na2 ...
    • Zn[BPO4(OH)2]: a zinc borophosphate with the rare moganite-type topology 

      Huang, Y. X.; Prots, Y.; Kniep, R.; 黄雅熙 (2008)
      rences: 26 [ view related records ] Citation MapCitation Map Abstract: A novel zinc borophosphate Zn[BPO4(OH)(2)] with moganite-type topology (a rare polymorph of silica) has been prepared from a mixture of ZnO, B2O3, and ...
    • ZnO/Ni/C composite hollow microspheres as anode materials for lithium ion batteries 

      Xie, Qingshui; Ma, Yating; Zhang, Xiaoqiang; Wang, Laisen; Yue, Guanghui; Peng, Dong-Liang; 王来森; 岳光辉; 彭栋梁 (Elsevier Ltd, 2015 Janua)
      ZnO/Ni/C composite hollow microspheres were synthesized by calcination of zinc-nickel citrate hollow microspheres at 500 °C for 2 h in argon. The composite hollow microspheres with an average diameter of 1.2 μm are made ...
    • ZnSe/MoO3/TiO2复合膜的制备及其光生阴极保护效应 

      王海鹏; 官自超; 王霞; 金飘; 许慧; 陈丽芳; 宋光铃; 杜荣归 (2019-11-15)
      针对TiO2半导体不能有效吸收可见光,光电转换效率较低等问题,可通过对TiO2半导体进行修饰和改性,制备TiO2复合材料,提高其光电化学性能。因此,本工作以Ti表面制备的TiO2纳米管膜为基础,分别应用循环伏安电沉积法和脉冲电沉积法在膜表面先后沉积MoO3和ZnSe颗粒,获得具有级联能带结构的ZnSe/MoO3/TiO2纳米管复合膜,并将其应用于对403不锈钢(403SS)实施光生阴极保护。相较于纯TiO2纳米管膜,紫外-可见(UV-V ...
    • Zr_(1-x)Si_xN纳米涂层的制备及其力学性能 

      黄若轩; 孙鹏; 朱芳萍; 祁正兵; 王周成 (2010-10-15)
      采用直流与射频共溅射技术制备Zr1-xSixN纳米涂层。通过改变Si靶溅射功率控制涂层中Si含量,研究了不同Si含量对Zr1-xSixN涂层的物相结构、晶粒尺寸、硬度和摩擦磨损性能的影响,探索了Zr1-xSixN纳米涂层的致硬机理。结果表明:Si的掺入影响Zr1-xSixN涂层的择优取向和相结构,随着Zr1-xSixN涂层中Si含量的增加,涂层截面的形貌由柱状晶转变为非柱状等轴晶,其结构的变化为:固溶体→nc-ZrN/α-Si3N4结构 ...
    • α-磷酸三钙水解法修复牙釉质龋 

      马英; 李思维; 冯祖德 (2009-03-15)
      采用α-磷酸三钙(α-TCP)水解法在牙釉质表面制备羟基磷灰石(HA)涂层,并用XRD、SEM、TEM、显微硬度仪和自制的牙刷磨耗试验机对涂层的结构和性能进行表征.采用L929细胞对α-TCP水解液进行细胞毒性评价.结果显示:α-TCP在37℃条件下水解6h,即可在牙釉质表面得到厚度约20μm的HA涂层,此涂层与牙釉质表面结合紧密,涂层的硬度与正常牙釉质无明显的差异,并且具有良好的耐磨性.该方法反应条件温和、简便、安全、有效,有望应用于 ...
    • β-甲壳素/壳聚糖纳米级微粒的制备初步研究 

      董炎明; 阮永红; 王锦山; 吴玉松 (2003-01-30)
      采用物理和化学方法相结合的处理,制备了β 甲壳素/壳聚糖纳米级微粒.在这一制备过程中,预处理和反应的条件非常重要.从TEM照片看,这些纳米微晶颗粒的形状是圆形的,直径为10~100nm.
    • 一步法合成无规支化聚苯乙烯(ABPS)的研究 

      郭金全; 邹友思; 袁亿文; 付暄; 潘容华 (1996-03-30)
      在无水ZnCl2催化下,用SO2Cl2/CH2(OCH3)2法对阴离子聚合所得的窄分子量分布聚苯乙烯(D<1.10)进行氯甲基化反应,同时使生成的氯甲基化聚苯乙烯发生大分子间的Friedel-Crafts反应,一步合成了结构明确的无规支化聚苯乙烯