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用聚苯乙烯小球模拟生物组织中的光强分布

物理学报 2003年第2期52卷 324-327页

作者：郭红莲程丙英张道中中国科学院物理研究所凝聚态物理中心光物理实验室北京100080

用水中周期排列的直径为 3.m的单层聚苯乙烯小球以及单个聚苯乙烯小球模拟对光敏感的生物组织 ,如绿色植物叶肉细胞、动物皮肤的表皮细胞、苍蝇蜜蜂等的复眼以及一种海蛇尾背部的光敏器官的光强分布 .通过观测聚苯乙烯小球在不同深度... 详细信息

用水中周期排列的直径为 3.m的单层聚苯乙烯小球以及单个聚苯乙烯小球模拟对光敏感的生物组织 ,如绿色植物叶肉细胞、动物皮肤的表皮细胞、苍蝇蜜蜂等的复眼以及一种海蛇尾背部的光敏器官的光强分布 .通过观测聚苯乙烯小球在不同深度的光强分布 ,发现随着深度的改变其光强分布是截然不同的 .在小球的横截面上 ,光强分布不很均匀而且呈有规律的花纹图案 .在小球的外面 ,光强分布表现为独立的透镜成像分布 .周期排列的小球与单个小球在其横截面上的光强分布也完全不同 ,前者的光强分布表现出球与球之间很大的相关性 .

关键词：聚苯乙烯小球模拟生物组织周期排列光强分布

A note on the discovery of a 2M_⊙ pulsar

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Research in Astronomy and Astrophysics 2011年第6期11卷 687-691页

作者： Xiao-Yu Lai Ren-Xin Xu School of physics and State Key laboratory of Nuclear physics and Technology Peking University Beijing 100871 China

It is conventionally thought that the state equation of dense matter softens and thus cannot result in high maximum mass if pulsars are quark stars and that a recently discovered 2M⊙ pulsar （PSR J1614–223.） may make pulsars unlikely to be quark stars. However, this standard point of view would be revisited and updated if quark clustering could occur in cold quark matter because of the strong coupling be- tween quarks at realistic baryon densities in compact stars. It can be argued that the state equation of clustered quark matter stiffens to support compact stars with maxi- mum mass Mmax 2M⊙. In this brief note, it is demonstrated that large parameter space ranges are allowed for Mmax 2M⊙ in a Lennard-Jones model of clustered quark matter and the newly measured highest mass of PSR J1614–223. would be meaningful for constraining the number of quarks inside a single quark-cluster to be Nq ≤ 103.

关键词： dense matter — elementary particles — pulsars: general — stars: neutron

SrTiO_3.片的晶体质量及表面粗糙结构的X射线研究

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物理学报 1997年第9期46卷 1758-1763页

作者：李超荣朱爱军戴道扬麦振洪中国科学院凝聚态物理中心中国科学院物理研究所中国科学院微重力实验室

用Ｘ射线双晶衍射摇摆曲线以及双晶Ｘ射线形貌对两个ＳｒＴｉＯ３基片的单晶质量进行了对比研究，并用Ｘ射线掠入射镜面反射及漫散射研究了它们的表面粗糙结构．结果表明，两个ＳｒＴｉＯ３基片中都存在镶嵌缺陷，其中一个样品的晶体质... 详细信息

用Ｘ射线双晶衍射摇摆曲线以及双晶Ｘ射线形貌对两个ＳｒＴｉＯ３基片的单晶质量进行了对比研究，并用Ｘ射线掠入射镜面反射及漫散射研究了它们的表面粗糙结构．结果表明，两个ＳｒＴｉＯ３基片中都存在镶嵌缺陷，其中一个样品的晶体质量相对较高．两个样品的表面粗糙结构相差很大，包括均方根粗糙度σ和横向相关长度ξ．σ分别为（０５±０１）和（１３±０１）ｎｍ，ξ分别为（１２００±２００）和（３００±２０）ｎｍ．样品的表面粗糙将增加Ｘ射线的漫散射强度而降低镜面反射的强度．晶体质量较高的样品，其表面也较平整，粗糙度较小。

关键词：钛酸锶基片晶体质量表面结构光电子材料

Characteristics of plasma jet in laser driven magnetic reconnections

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Characteristics of plasma jet in laser driven magnetic recon...

Dember effect induced photovoltage in Oxide p-n junctions

第十五届全国等离子体科学技术会议

作者： Xun Liu1,~,Yutong Li1,+,Jiayong Zhong2,Quanli Dong1,Shoujun Wang1,Lei Zhang1,Jianqiang Zhu3.Gang Zhao2 and Jie Zhang1,4,+ 1 beijing national laboratory for condensed matter physics,Institute of physics,Chinese Academy of Sciences,beijing{3.,china, 2 Key laboratory of Optical Astronomy,national Astronomical Observatories,Chinese Academy of Sciences,beijing 100012,china, 3.national laboratory on High Power Lasers and physics,Shanghai,201800,china, 4 Key laboratory for Laser Plasmas(Ministry of Education) and Department of physics,Shanghai Jiao Tong University,Shanghai 200240,china.

The jet driven by magnetic reconnection in laser-plasma interactions is investigated *** diagnostics in the optical and x-ray ranges provide detailed information about the jet *** plasma jets perpendicular to and alon... 详细信息

关键词： laboratory astrophysics jet magnetic reconnection laser-plasma

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Dember effect induced photovoltage in Oxide p-n junctions

在Si(111)-(7×7)表面自组织生长二维Ge团簇超晶格

第七届全国光学前沿问题讨论会

作者： Jin Kui-juan~1 Zhao Kun~2 Lu Hui-bin~1 Liao Leng~1 Yang Guo-zhen~1 (1 beijing national laboratory for condensed matter physics,Institute of physics,Chinese Academy of Sciences,beijing 100080,{3. 2 Department of Mathematics and physics,{3. University of Petroleum,beijing 102249,{3.)

An unusual and rather large transient lat- eral photovoltage(LPV)is observed in LaSr MnO/SrNbTiO and LaSrOMnO/Si hetero- junctions under the nonuniform irradiation of pulsed laser. The irreversible LPVs on both sides ...

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物理学报 2002年第5期51卷 1017-1021页

作者：闫隆张永平彭毅萍庞世谨高鸿钧中国科学院物理研究所和凝聚态物理中心北京真空物理开放实验室北京100080

利用超高真空扫描隧道显微镜研究了室温条件下亚单层Ge在Si(111) (7× 7)表面上的自组织生长 .通过控制Ge的沉积量 ,在Si(111) (7× 7)表面上自组织生长成一种具有六重对称性的二维Ge团簇超晶格 .构成超晶格的Ge团簇均位于 (7× 7)亚... 详细信息

利用超高真空扫描隧道显微镜研究了室温条件下亚单层Ge在Si(111) (7× 7)表面上的自组织生长 .通过控制Ge的沉积量 ,在Si(111) (7× 7)表面上自组织生长成一种具有六重对称性的二维Ge团簇超晶格 .构成超晶格的Ge团簇均位于 (7× 7)亚单胞的位置上 ,而且它们的形状和大小基本保持一致 .

关键词：扫描隧道显微镜 STM Si(111)-(7×7)表面二维Ge团簇超晶格自组织结构半导体外延生长自组织生长硅衬底

Dependence of the solar cell performance on nanocarbon/Si heterojunctions

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Chinese physics B 2018年第7期27卷 595-600页

作者：肖仕奇范庆霞夏晓刚肖卓建陈辉亮席薇陈鹏辉李俊杰王艳春刘华平周维亚 beijing national laboratory for condensed matter physics Institute of Physics Chinese Academy of Sciences University of Chinese Academy of Sciences beijing Key laboratory for Advanced Functional Materials and Structure Research

Solar cells that combine single-crystalline silicon （Si） with graphene （G） have been widely researched in order to develop next-generation photovoltaic devices. However, the power conversion efficiency （PCE） of G/Si solar cell without chemical doping is commonly low due to the relatively high resistance of graphene. In this work, through combining graphene with carbon nanotube （CNT） networks, we fabricated three kinds of hybrid nanocarbon film/Si heterojunction solar cells in order to increase the PCE of the graphene based Si solar cell. We investigated the characteristics of different nanocarbon film/Si solar cells and found that their performance depends on the heterojunctions. Specifically, a doping-free G-CNT/Si solar cell demonstrated a high PCE of 7.9%, which is nearly equal to the combined value of two individuals （G/Si and CNT/Si）. This high efficiency is attributed to the synergistic effect of graphene and CNTs, and can be further increased to 9.1% after applying a PMMA antireflection coating. This study provides a potential way to further improve the Si based heterojunction solar cells.

关键词： carbon nanotube graphene heterojunction silicon solar cell

Gas pressure dependence of composition in Ta-Ti-N films prepared by pulsed high energy density plasma

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Gas pressure dependence of composition in Ta-Ti-N films prep...

Relaxation of Chain Extension of Amorphous PET Fiber Above the Glass Transition Temperature

第18届国际真空大会

作者： W. R. Zeng a * H. Zhou F. Chen S. Z. Yang b a Department of Materials Science & Engineering beijing Institute of Petrochemical Technology beijing 102617 china b{3. Institute of physics Chinese Academy of Sciences beijing 100080 china

Tantalum titanium nitride （Ta-Ti-N） films were deposited on silicon wafer substrates by pulsed high energy density plasma （PHEDP）, under different intake gas pressure, ranging from 0.1 to 0.4 MPa. The films were investigated by X-ray photoelectron spectroscopy. Results were analyzed in detail, which reveals that the contents of the metallic elements （Ta and Ti） tend to decrease with pressure, while that of nitrogen increases as expected. The bonding state of tantalum, titanium, as well as nitrogen was discussed. It seems that almost all the titanium bonded with nitrogen. The Ta-N and Ti-N bonds have equal shares under low gas intake pressure, while the Ti-N bonds prevail under high pressure. The mechanisms change under different conditions.

关键词： Plasma PHEDP Tantalum titanium nitride Films XPS

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Chinese Chemical Letters 2000年第10期11卷 925-928页

作者： Xin LINGHU, Jun ZHAO, Rui SONG, Qing Rong FAN (Polymer physics laboratory, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, beijing, 100080) Polymer physics laboratory Center of Molecular Science Institute of Chemistry Beijing 100080 China

The recovery of amorphous PET fiber in global chain orientation but nearly random segmental orientation (GOLR) state was studied by the hot shrinkage measurement above the glass transition temperature. The relaxation curves in the form of di-exponential decay were acquired and the change of two special times with the variation of treating temperature and residual recovery ratio ' was discussed.

关键词： GOLR state PET recovery of chain extension hot shrinkage measurement.