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Chinese Journal of Polymer Science 2010年第2期28卷 165-170页

作者： Hans-Friedrich Enderle Dieter Lilge Stephan V.Roth Rainer Gehrke Jens Rieger 门永锋 Basell Polyolefine GmbH R&D65926 FrankfurtGermany hasylab am desy Notkestr.8522607 HamburgGermany BASF SE Polymer Research67056 LudwigshafenGermany State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences

The structural changes around a crack tip in a high density polyethylene were investigated by means of scanning synchrotron microfocus small-angle X-ray scattering technique. The scattering data confirm the process of craze structure development near a crack tip based on the evolution of voids. In addition, it was found that the main stress in the plastic zone near a crack tip exhibited a gradient distribution with respect to its strength and direction. The whole damaged area showed a strain distribution indicating a flow behavior toward the crack tip.

关键词： High density polyethylene Microfocus SAXS Crack tip Voids.

CONFINED LamELLA FORMATION IN CRYSTALLINE-CRYSTALLINE POLY(ETHYLENE OXIDE)-b-POLY(ε-CAPROLACTONE) DIBLOCK COPOLYMERS

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Chinese Journal of Polymer Science 2013年第9期31卷 1260-1270页

作者： Fei-fei Xue Xue-si Chen Li-jia An Sergio S. Funari Shi-chun Jiang School of Materials Science and Engineering Tianjin University State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences hasylab at desy

The real time and in situ investigation of the crystallization process and structure transitions of asymmetric crystalline-crystalline diblock copolymers from the melt was performed with synchrotron simultaneous SAXS/WAXS. The asymmetric poly（ethylene oxide）-b-poly（ε-caprolactone） diblock copolymers were chosen for the present study. It was shown that the short blocks crystallized later than the long blocks and final lamellar structure was formed in all of the asymmetric diblock copolymers. The final lamellar structure was confirmed by AFM observation. The SAXS data were analyzed with different methods for the early stage of the crystallization. The Guinier plots indicated that there were no isolated domains formed before the formation of lamellae in the asymmetric diblock copolymers during the crystallization process. Debye- Bueche plots implied the formation of correlated domains during crystallization.

关键词： PEO-b-PCL diblock copolymers Synchrotron simultaneous SAXS/WAXS Polymer crystallization Confinedlamella formation.

In situ grazing-incidence small-angle X-ray scattering observation of block-copolymer templated formation of magnetic nanodot arrays and their magnetic properties

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Nano Research 2017年第2期10卷 456-471页

作者： Andreas Meyer Norbert Franz Hans Peter Oepen Jan Perlich Gerardina Carbone Till Hartmut Metzger Institut fiJr Physikalische Chemie Universitat Hamburg Grindelallee 117 20146 Ham burg Germany Institut for Nanostruktur und Festkorperphysik Universitat Hamburg Jungiusstr. 11a 20355 Hamburg Germany hasylab/Deutsches Elektronen Synchrotron Notkestr. 85 22603 Hamburg Germany European Synchrotron Radiation Facility 6 rue Jules Horowitz 38043 Grenoble France

The fabrication of bit-patterned media （BPM） is crucial for new types of hard disk drives. The development of methods for the production of BPM is progressing rapidly. Conventional lithography reaches the limit regarding lateral resolution, and new routes are needed. In this study, we mainly focus on the dependence of the size and shape of magnetic nanodots on the Ar＋-ion etching duration, using silica dots as masks. Two-dimensional （2D） arrays of magnetic nanostructures are created using silica-filled diblock-copolymer micelles as templates. After the self-assembly of the micelles into 2D hexagonal arrays, the polymer shell is removed, and the SiO2 cores are utilized to transform the morphology into a （Co/Pt）2-multilayer via ion etching under normal incidence. The number of preparation steps is kept as low as possible to simplify the formation of the nanostructure arrays. High-resolution in situ grazing-incidence small-angle X-ray scattering （GISAXS） investigations are performed during the Ar＋-ion etching to monitor and control the fabrication process. The in situ investigation provides information on how the etching conditions can be improved for further ex situ experiments. The GISAXS patterns are compared with simulations. We observe that the dots change in shape from cylindrical to conical during the etching process. The magnetic behavior is studied by utilizing the magneto-optic Kerr effect. The Co/Pt dots exhibit different magnetic behaviors depending on their size, interparticle distance, and etching time. They show ferromagnetism with an easy axis of magnetization perpendicular to the film. A systematic dependence of the coercivitv on the dot size is observed.

关键词： poly(styrene)-b-poly(vinyl pyridine) argon ion etching self-assembly grazing-incidence small-angle X-ray scattering(GISAXS) simulation magnetic nanodot coercivity

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同步辐射高分辨率衍射光束线的设计(英文)

光学精密工程 2007年第12期15卷 1900-1907页

作者： U Pietsch O H Seeck Faculty of Physics Siegen UniversityD-57068 SiegenGermany hasylab at desy D-22603 HamburgGermany

介绍了第三代同步辐射高分辨率X射线衍射光束线的总体设计。给出了高分辨率衍射的基本原理并描述了获得确定光子能量的近平行高强度X射线光束线所必需的光学元件。特别是用X射线动力学理论,解释了双晶及四次反射晶体单色器。作为一个实... 详细信息

介绍了第三代同步辐射高分辨率X射线衍射光束线的总体设计。给出了高分辨率衍射的基本原理并描述了获得确定光子能量的近平行高强度X射线光束线所必需的光学元件。特别是用X射线动力学理论,解释了双晶及四次反射晶体单色器。作为一个实例,介绍了将于2009年开始在德国汉堡运行的一个新的同步辐射源PETRAⅢ的高分辨率衍射( HighRes)光束线的设置情况。通过优化光学部件,对微米尺寸光束,q空间的分辨减小到Δq=10-5nm-1,光通量大于1011cts/s。

关键词：同步辐射衍射光束线高分辨率

用掠入射小角X射线散射（GISAXS）研究在退火作用下乳胶膜表面结构的演化及重组

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用掠入射小角X射线散射（GISAXS）研究在退火作用下乳胶膜表面结...

2007年全国高分子学术论文报告会

作者：胡珊珊 Jens Riege Stephan V.Roth Rainer Gehrke 门永锋中国科学院长春应用化学研究所高分子物理和化学国家重点实验室 BASF Aktiengesellschaft Polymer Physics 67056 LudwigshafenGermany hasylab am desy notkestr.85 D-22607 HamburgGermany hasylab am desy notkestr.85 D-22607 HamburgGermany 高分子物理和化学国家重点实验室中国科学院长春应用化学研究所

＜正＞具有壳核结构的乳胶粒子（R=250nm）在硅片上干燥成膜后在不同温度下退火,其表面结构发生一系列演变。这一过程用掠入射小角 X 射线散射（GISAXS）和原子力显微镜（AFM）的方法对其进行了研究。体积百分数为1％的乳胶液（核/壳... 详细信息

＜正＞具有壳核结构的乳胶粒子（R=250nm）在硅片上干燥成膜后在不同温度下退火,其表面结构发生一系列演变。这一过程用掠入射小角 X 射线散射（GISAXS）和原子力显微镜（AFM）的方法对其进行了研究。体积百分数为1％的乳胶液（核/壳：聚苯乙烯/聚丙烯酸酯）

关键词：掠入射小角X射线散射 GISAXS 乳胶表面退火

Continuous wafer-scale graphene on cubic-SiC（O01）

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Nano Research 2013年第8期6卷 562-570页

作者： Alexander N. Chaika Olga V. Molodtsova Alexei A. Zakharov Dmitry Marchenko Jaime Sanchez-Barrig Andrei Varykhalov Igor V. Shvets Victor Yu. Aristov Institute of Solid State Physics RAS Chemogolovka Moscow District 142432 Russia Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) School of Physics Trinity College Dublin 2 Ireland hasylab at desy D-22607 Hamburg Germany MAX-lab Lund University Box 118 22100 Lund Sweden Helmholtz-Zentrum Berlin für Materialien und Energie D- 12489 Berlin Germany

The atomic and electronic structure of graphene synthesized on commercially available cubic-SiC（001）/Si（001） wafers have been studied by low energy electron microscopy （LEEM）, scanning tunneling microscopy （STM）, low energy electron diffraction （LEED）, and angle resolved photoelectron spectroscopy （ARPES）. LEEM and STM data prove the wafer-scale continuity and uniform thickness of the graphene overlayer on SIC（001）. LEEM, STM and ARPES studies reveal that the graphene overlayer on SIC（001） consists of only a few monolayers with physical properties of quasi-freestanding graphene. Atomically resolved STM and micro-LEED data show that the top graphene layer consists of nanometer-sized domains with four different lattice orientations connected through the 〈110〉-directed boundaries. ARPES studies reveal the typical electron spectrum of graphene with the Dirac points close to the Fermi level. Thus, the use of technologically relevant SiC（001）/Si（001） wafers for graphene fabrication repre-sents a realistic way of bridging the gap between the outstanding properties of graphene and their applications.

关键词： graphene cubic-SiC(001) STM ARPES LEEM LEED

Deformation induced structural evolution in bulk metallic glasses

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Chinese Science Bulletin 2011年第5期56卷 3952-3959页

作者： WANG Gang MATTERN Norbert BEDNARCI Jozef XIA Lei ZHAI QiJie DONG YuanDa ECKERT Jvrgen Laboratory for Microstructures Shanghai University Shanghai 200444 China Leibniz-Institute IFW Dresden Institute for Complex MaterialsDresden D-01069Germany hasylab at desy Hamburg D-22603Germany TU Dresden Institute of Materials ScienceDresden D-01062Germany

The structural behavior of binary Cu50Zr50 and ternary Cu50Zr45Ti5 bulk metallic glasses (BMGs) under applied stress was investigated by means of in-situ high energy X-ray synchrotron diffraction. The components of the strain tensors were determined from the shifts of the maxima of the atomic pair correlation functions (PDF) in real space. The anisotropic atomic reorientation in the first-nearest-neighbor shell versus stress suggests structural rearrangements in short-range order. Within the plastic deformation range the overall strain of the metallic glass is equal to the yield strain. After unloading,the atomic structure returns to the stress-free state,and the short-range order is identical to that of the undeformed state. Plastic deformation,however,leads to localized shear bands whose contribution to the volume averaged diffraction pattern is too weak to be detected. A concordant region evidenced by the anisotropic component is activated to counterbalance the stress change due to the atomic bond reorientation in the first-nearest-neighbor shell. The size of the concordant region is an important factor dominating the yield strength and the plastic strain ability of the BMGs.

关键词：大块金属玻璃结构演变形变诱导塑性变形能力应力各向异性块体非晶合金原子结构应变张量

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同步辐射小角X射线散射研究单轴拉伸具有轴对称晶体结构的乳胶膜的形变过程

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同步辐射小角X射线散射研究单轴拉伸具有轴对称晶体结构的乳胶膜...

2009年全国高分子学术论文报告会

作者：张建齐胡珊珊 J.Rieger S.Roth R.Gehrke 门永锋中国科学院长春应用化学研究所高分子物理与化学国家重点实验室 BASF SE Polymer Physics67056 LudwigshafenGermany hasylab am desy Notkestr.8522607 HamburgGermany

＜正＞本文利用同步辐射小角X射线散射（SAXS）的方法,在线观测了具有轴对称晶体结构的乳胶膜的单轴拉伸,并对其形变机理进行了研究。乳胶膜被分别沿着与对称轴成0、35和55度角进行了拉伸。实验结果表明在这三种情况下乳胶膜的形变都是... 详细信息

＜正＞本文利用同步辐射小角X射线散射（SAXS）的方法,在线观测了具有轴对称晶体结构的乳胶膜的单轴拉伸,并对其形变机理进行了研究。乳胶膜被分别沿着与对称轴成0、35和55度角进行了拉伸。实验结果表明在这三种情况下乳胶膜的形变都是非仿射性的,但是它们偏

关键词：小角X射线散射轴对称晶体乳胶膜形变机理

利用同步辐射SAXS研究高分子乳胶体系的结构演化

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利用同步辐射SAXS研究高分子乳胶体系的结构演化

2009年全国高分子学术论文报告会

作者：门永锋胡珊珊陈雪莲赖宇晴张建齐 J.Rieger S.V Roth R.Gehrke 吴忠华中科院长春应用化学研究所高分子物理与化学国家重点实验室 BASF Aktiengesellschaft Polymer Physics67056 LudwigshafenGermany hasylab am desy Notkestr.8522607 HamburgGermany 中科院高能物理研究所北京同步辐射装置

＜正＞高分子乳胶通常是粒径为100nm左右的高分子微球分散在水中,其粒径范围恰好适合利用同步辐射小角X射线散射（SAXS）技术来研究。我们选择性地研究了高分子乳胶成膜过程中及成膜后在外场（力、温度）作用下的结构演化。在成膜过程中... 详细信息

＜正＞高分子乳胶通常是粒径为100nm左右的高分子微球分散在水中,其粒径范围恰好适合利用同步辐射小角X射线散射（SAXS）技术来研究。我们选择性地研究了高分子乳胶成膜过程中及成膜后在外场（力、温度）作用下的结构演化。在成膜过程中,高分子乳胶微球在水分

关键词： SAXS 乳胶胶体晶体成膜

应用小角X射线散射研究单轴拉伸冷拉取向的高密度聚乙烯形变机理

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应用小角X射线散射研究单轴拉伸冷拉取向的高密度聚乙烯形变机理

2007年全国高分子学术论文报告会

作者：唐毓婧姜志勇安立佳 J Riege S.V Roth R.Gehrke H-F.Enderle D.Lilge 门永锋中国科学院长春应用化学研究所高分子物理与化学国家重点实验室中国科学院长春应用化学研究所高分子物理与化学国家重点实验室中国科学院长春应用化学研究所高分子物理与化学国家重点实验室 BASF Aktiengesellschaft Polymer Physics 67056 LudwigshafenGermany hasylab am desy notkestr.85 22607 HamburgGermany hasylab am desy notkestr.85 22607 HamburgGermany Basell Polyolefine GmbH R＆D 65926 FrankfurtGermany Basell Polyolefine GmbH R＆D 65926 FrankfurtGermany Basell Polyolefine GmbH R＆D 65926 FrankfurtGermany

＜正＞我们利用同步辐射小角 X 射线散射（SAXS）技术来研究单轴拉伸冷拉取向的高密度聚乙烯的变形机理。散射数据的结果一方面证实了 Peterlin 提出的关于冷拉取向聚乙烯的层次性的内部微观结构：取向的聚乙烯由微纤构成,微纤由小微纤... 详细信息

＜正＞我们利用同步辐射小角 X 射线散射（SAXS）技术来研究单轴拉伸冷拉取向的高密度聚乙烯的变形机理。散射数据的结果一方面证实了 Peterlin 提出的关于冷拉取向聚乙烯的层次性的内部微观结构：取向的聚乙烯由微纤构成,微纤由小微纤组成,小微纤内含有取向的片

关键词： 2D-SAXS 聚乙烯取向