检索结果-南通市图书馆

18th International Conference on High Pressure Science and Technology

作者： R.C.Yu L.C.Chen J.L.Zhu F.Y.Li Z.X.Liu Z.C.Qin T.N.Yu X.F.Duan Z.Zhang C.Q.Jin Laboratory for Extreme Condition physics institute of physics {3. for condensed matter physics High Pressure Research {3. chinese Academy of sciences P.O.Box 603.Beijing 100080 P.R.china Beijing Laboratory of Electron Microscopy institute of physics {3. for condensed matter physics chinese Academy of sciences P.O.Box. 2.2. Beijing 100080 P.R.china

＜正＞C3.4H4 was treated under 6.0 GPa and 1500℃ for 2.5 minutes. The powder X-ray measurement shows that the sample was decomposed and hexagonal graphite phase formed. Transmission electron microscopy studies show that small amount of diamond and amorphous carbon phases coexited with graphite phase. Parallel electron energy loss spectroscopy analysis was also carried out for these phases. Introduction Diamond has been widely used due to its hardness. To most common knowlege, there is no material that can compete with it. However, in 1985, Cohn predicted a new superhard material of a covalent bonded carbon-nitrogen alloy（β-C3.4）, which has the same or even higher hardness of diamond, based on a theoretical work[l]. Motivated by the prediction, a lots of scientists have attempted to synthesize C-N compounds which may not exist in nature[2.3.. In this paper, we report the products of C3.4H4 treated by high temperature - high pressure. Experiments Synthesis experiments were performed with a six-anvil 600 ton high pressure device. The C3.4H4（2.amino,1,3.5-triazine） powders were wrapped by Pt or Ti thin slice and sealed into a BN sample cell. The Ni-based alloy flats were put to the both sides of the sample as the catalyst. In the experiment, a pressure of 6.0 GPa and a temperature of 1500℃ were applied for 2.5 minutes. Results and Discussion Here it should be pointed out that no carbon nitride crystals were obtained in our experiments. X-ray pattern of the treated sample shows that C3.4H4 were decomposed under high pressure and graphite phase formed and hexagon graphite phase formed. The samples were also examnied by high resolution transmission electron microscopy（HRTEM）. Three morphologies were observed in the HRTEM experiments. The majority phase which were observed frequently in the sample was hexagonal graphite phase. This is concided with the XRD result. Besides the majority graph

关键词： High Pressure C3.4H4 Diamond Graphite

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effects of laser polarization on hot electron emission in femtosecond laser-plasmas

Effects of laser polarization on hot electron emission in fe...

引用

CCAST“2.02.全国强场激光物理”研讨会

作者： J. Zhang, L.M. Chen, H. Teng, T.J. Liang, L.Z. Zhao, Z.Y. WeiLaboratory of Optical physics, institute of physics, {2. for {3. matter physicschinese Academy of sciences, Beijing 100080 china

Effects of laser polarization were studied on behaviors of fast electrons produced from an aluminum target irradiated by a solid target irradiated by obliquely incident laser pulses at 8×10 W/cm. Jet emission of outgoing fast electrons collimated in the polarization direction was observed for the s-polarized laser irradiation, whereas for the p-polarized irradiation, very directional emission of outgoing fast electrons was found close to the normal direction of the target. The behaviors of in-going fast electrons into the target for s- and p-polarized irradiation were also investigated by observing x-ray Bremsstrahlung radiation at the backside of the target.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Fabrication of CoFe Nanostructures by Holographic Lithography

Fabrication of CoFe Nanostructures by Holographic Lithograph...

引用

2.07亚洲光电子会议纳米光子学/纳米结构/纳米计量学分会场

作者： Zijun Zhang a,Xudi Wang b,Ying Liu a,Yuxian Guo a,Yilin Hong a,Xiangdong Xua,Shaojun Fu a,Pengshou Xu a,Jie Wang a,Jianwang Cai c a National Synchrotron Radiation Laboratory,University of Science and Technology of china/P.O.Box 602.,Hefei,Anhui 2.002.,china b Academic of Precision Machinery and Precision Instrumentation,USTC,Hefei 2.002.,china c State Key Laboratory of Magnetism,institute of physics and center of condensed matter physics,chinese Academy of sciences,Beijing 100080,china

A novel process that combines interference lithography and ion beam etching is presented for fabrication of magnetic submicron structures and nanostructures in this *** of an antireflective coating,vertical standing wave patterns were removed using oxygen descumming process.A series of magnetic submicronmeter structures were fabricated on Co0.9Fe0.1 films by this *** of magnetic nanostructures was performed by using a high exposure dose and modifications in optimized development conditions.A thin Au film was deposited on the sidewall of the magnetic nanostructures to avoid the oxidation of Co and *** effect of this method was confirmed by X-ray photoelectron spectroscopy(XPS).Hysteresis loops measured by a highly sensitive superconducting quantum interference device(SQUID)technique show the different magnetic properties of the magnetic patterns with different critical dimensions.

关键词： holographic lithography,patterned media,oxygen descumming,hysteresis loops

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Application of multi-pulse optical imaging to measure evolution of laser-produced counter-streaming flows

引用

chinese physics B 2017年第5期26卷 165-169页

作者：袁大伟李玉同朱保君李彦霏仲佳勇魏会冈刘畅原晓霞张喆梁贵云王菲鹿李芳赵家瑞华能朱宝强朱健强江少恩杜凯丁永坤赵刚张杰 Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences National Laboratory for condensed matter {2. Institute of Physics Chinese Academy of Sciences School of Physical sciences University of Chinese Academy of Sciences Collaborative Innovation center of IFSA(CICIFSA) Shanghai Jiaotong University Department of Astronomy Beijing Normal University National Laboratory on High Power Lasers and physics Research center for Laser Fusion China Academy of Engineering Physics Key Laboratory for Laser Plasmas(Ministry of Education)and Department of physics and Astronomy Shanghai Jiao Tong University

A counter-streaming flow system is a test-bed to investigate the astrophysical collisionless shock（CS） formation in the laboratory. Electrostatic/electromagnetic instabilities, competitively growing in the system and exciting the CS formation, are sensitive to the flows parameters. One of the most important parameters is the velocity, determining what kind of instability contributes to the shock formation. Here we successfully measure the evolution of the counter-streaming flows within one shot using a multi-pulses imaging diagnostic technique. With the technique, the average velocity of the high-density-part（ne ≥ 8–9 × 10^19cm^-3. of the flow is directly measured to be of ～ 10^6cm/s between 7 ns and 17 ***, the average velocity of the low-density-part（ne ≤ 2.× 10^19cm^-3. can be estimated as ～ 10^7cm/s. The experimental results show that a collisionless shock is formed during the low-density-part of the flow interacting with each other.

关键词： streaming counter interacting exciting instability determining diagnostic colors distinguish gamma

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pd/Fe和PdFe/Fe多层膜中的振荡行为

引用

物理学报 1999年第S1期48卷 244-249页

作者：王晶王荫君詹文山赵宏武沈保根中国科学院物理研究所与凝聚态物理中心磁学国家重点实验室北京100080

采用磁控溅射法制备了Ｐｄ／Ｆｅ和Ｐｄ１－ｘＦｅｘ／Ｆｅ多层膜．利用变换梯度磁强计测量了样品的Ｍｓ．发现层间耦合是铁磁性的，Ｍｓ具有长程振荡，周期为４ＭＬ．振荡的相位和周期在Ｐｄ０．９６６Ｆｅ０．０３４／Ｆｅ ... 详细信息

采用磁控溅射法制备了Ｐｄ／Ｆｅ和Ｐｄ１－ｘＦｅｘ／Ｆｅ多层膜．利用变换梯度磁强计测量了样品的Ｍｓ．发现层间耦合是铁磁性的，Ｍｓ具有长程振荡，周期为４ＭＬ．振荡的相位和周期在Ｐｄ０．９６６Ｆｅ０．０３４／Ｆｅ和Ｐｄ０．９４４Ｆｅ０．０５６／Ｆｅ系统中保持不变．就Ｐｄ／Ｆｅ多层膜中是否存在内层的Ｐｄ负极化和长程的铁磁耦合振荡进行了讨论，并分析了不同计算结果以及理论计算与实验结果之间存在差异的原因．

关键词：多层膜饱和磁化强度 Pd/Fe 凝聚态物理国家重点实验室振荡中国科学院物理研究所分子束外延交换作用

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The new research on mitochondria

The new research on mitochondria

引用

两岸三地药理学与临床药理学术会议

作者： JI Yu-bin~(1,2.3. ZHANG He~1 JI Chen-feng~(1,2.3. LIU Hong-juan~1 (1. center of Research and Development on Life {3. and Environmental {3., Harbin University of Commerce, Harbin 150076, china 2. institute of Materia Medica and Postdoctoral Programme of Harbin University of Commerce, Harbin 150076, china 3. Engineering Research center of Natural Anticancer Drugs, Ministry of Education, Harbin 150076, china)

Apoptosis,also known as programmed cell death,is the removal of damaged body organizations, aging or redundant cells in a suicide,has to maintain the health of the body,the normal development of the nervous system,the immune system to maintain the normal function of such areas is of great significance. The morphological characteristics of apoptosis are the cytoplasm concentrated,condensed nuclear chromatin, DNA fragments of a large-scale,the cell membrane invagination and foam formation of apoptotic bodies. There are two classic apoptosis ways which are generally accepted by majority of the scholars currently:Mi- tochondrial pathway and Death receptor *** membrane is a two-tier structure surround- ed the cystic,between the external cavity and internal cavity which is called the Room,surrounded by the internal cavity known as the mitochondria internal room or mitochondrial *** with the functions of control cell survival and death:mitochondria play an important role in physiological such as ox- idative phosphorylation,electronic transfer,storage Ca,energy metabolism,anti-oxidation activity and so on,to provide the basic energy to the various activities of cell *** found that mitochondria contain some of the material is closely related to apoptosis,such as Cyt-C,Smac/Diablo,AIF,Ca,ROS and so on. In the signal to stimulate apoptosis,mitochondrial membrane permeability,resulting in a series of key changes,including Cyt-C,Smac/Diablo release,decline of the mitochondrial membrane potential(△ψm), the state of the redox within cells,the intervention of Bcl gene family and so *** signal transduc- tion ultimately focuses on the mitochondria to activate or inhibit these incidents,then the corresponding sig- nal transduction to control ***,the mitochondria in the incidence of apoptosis play an im- portant *** recent years,the study confirmed that apoptosis imbalance can cause a variety of human dis- ***

关键词： apoptosis mitochondria

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

四元Heusler合金NiMnFeGa中Fe原子的磁性贡献

引用

物理学报 2003年第9期52卷 2304-2308页

作者：千正男隋郁刘玉强柳祝红刘国栋张铭崔玉亭陈京兰吴光恒哈尔滨工业大学凝聚态科技中心哈尔滨150001 中国科学院物理研究所磁学国家重点实验室北京100080

用熔炼和甩带的方法制备了组分为Ni50 FexMn2.5-xGa2.5(x =0— 2.5 )的系列样品 .x射线衍射实验结果表明 ,当Fe取代Mn的含量x 17时 ,普通熔炼方法只能得到低有序度的γ相 ,只有采用甩带急冷的方法才能获得高度有序的纯L2.1 结构的化合... 详细信息

用熔炼和甩带的方法制备了组分为Ni50 FexMn2.5-xGa2.5(x =0— 2.5 )的系列样品 .x射线衍射实验结果表明 ,当Fe取代Mn的含量x 2.1 结构的Heusler相 .而当x >17时 ,普通熔炼方法只能得到低有序度的γ相 ,只有采用甩带急冷的方法才能获得高度有序的纯L2.1 结构的化合物 .根据交流磁化率和分子磁矩的测试结果 ,初步分析了Fe原子对化合物磁性的贡献 ,认为Fe原子占据了Mn原子的位置后 ,具有高于一般含铁合金的原子磁矩 ,可达 2. 5 5— 3.5 5 μB.

关键词：铁磁性形状记亿合金 NiMnFeGa合金 Fe原子磁性马氏体相变磁性参量四元Heusler合金

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

球磨SmCo_5纳米晶的结构与磁性

引用

金属功能材料 2001年第3期8卷 10-12页

作者：张健沈保根中科院物理所磁学国家重点实验室北京100080

本文对球磨SmCo5及后续退火所形成纳米晶的结构与磁性进行了研究。研究表明 ,球磨后样品经不同温度退火可形成 1∶7相、1∶5相和 2.17相。样品的晶粒大小随退火温度的升高而增大。由于成相和晶粒大小的变化 ,样品的磁性能也发生很大变... 详细信息

本文对球磨SmCo5及后续退火所形成纳米晶的结构与磁性进行了研究。研究表明 ,球磨后样品经不同温度退火可形成 1∶7相、1∶5相和 2.17相。样品的晶粒大小随退火温度的升高而增大。由于成相和晶粒大小的变化 ,样品的磁性能也发生很大变化 :随退火温度的升高 ,样品的矫顽力先升高而后降低 ,饱和磁化强度 ,剩磁比和最大磁能积随退火温度的升高而下降。通过对球磨后 5 5 0℃退火 3.min的样品的矫顽力机制研究表明。

关键词：球磨相转变纳米晶矫顽力机制永磁材料 SmCo5

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

IMPACT OF WIDE BANDGAP P-TYPE NC-SI ON THE PERFORMANCE OF A-SI SOLAR CELLS

IMPACT OF WIDE BANDGAP P-TYPE NC-SI ON THE PERFORMANCE OF A-...

引用

中国太阳能学会2.01年学术会议

作者： Xianbo Liao, Xunming Deng,Xianbi Xiang, Wenjing Wang, Shijin Han, Henry Povolny, and Wenhui DuDepartment of physics and Astronomy, University of Toledo, Toledo, OH 43.06State Laboratory for Surface physics, {2. of Semiconductors, and {3. for condensed matter physics, chinese Academy of sciences, Beijing 100083

This paper reports the impact of a wide bandgap p-type hydrogenatednanocrystalline silicon(nc-Si:H) on the performances of hydrogenated amorphoussilicon (a-Si:H) based solar *** p-layer is composed of nanometer-sized Sicrystallites embedded in a-SiHx matrix and the widening of its bandgap is mainly dueto the quantum size-confinement effect(QSE).By employing this p-layer we have obtained high performances of a-Si:H topcells with Voc1.03.V and FF=72.5%,much improved a-SiGe:H mid and bottomcells,and also the spectral splitting triple-junction solar cells deposited on stainlesssteel (SS) substrate with the initial active area conversion efficiency of 12.7%(confirmed 12.5% by NREL) and stable efficiency of 10.5%.We have studied the problems associated with the p-i interface and the I-Vrollover behavior,and found that one cause for a poor interface is the mismatch of thevalance band edge *** using AMPS model developed by the Pernn StateUniversity supports our arguments.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

4英寸热氧化硅衬底上磁性隧道结的微制备

引用

物理学报 2004年第11期53卷 3895-3901页

作者：王天兴魏红祥李飞飞张爱国曾中明詹文山韩秀峰中国科学院物理研究所与凝聚态物理中心磁学国家重点实验室北京100080

就如何在 4英寸热氧化硅衬底上沉积高质量的磁性隧道结纳米多层薄膜材料和如何利用光刻方法微加工制备均匀性较好的磁性隧道结方面做了初步研究 ,并对磁性隧道结的磁电性质及其工作特性进行了初步测量和讨论 .利用现有的光刻设备和工艺... 详细信息

就如何在 4英寸热氧化硅衬底上沉积高质量的磁性隧道结纳米多层薄膜材料和如何利用光刻方法微加工制备均匀性较好的磁性隧道结方面做了初步研究 ,并对磁性隧道结的磁电性质及其工作特性进行了初步测量和讨论 .利用现有的光刻设备和工艺条件在 4英寸热氧化硅衬底上直接制备出的磁性隧道结 ,其结电阻与面积的积矢的绝对误差在 10 %以内 ,隧穿磁电阻的绝对误差在 7%以内 ,样品的磁性隧道结性质具有较好的均匀性和一致性。

关键词：磁性隧道结隧穿磁电阻电性质硅衬底绝对误差磁随机存储器均匀性热氧化光刻设备微加工

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：