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High Density Multiplication of Graphoepitaxy Directed Block Copolymer Assembly on Rectangle Lattice Template

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High Density Multiplication of Graphoepitaxy Directed Block ...

中国化学会第2.届学术年会

作者： Yu-qiang Ma National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 2.0093, china & center for Soft {2. {4. physics and Interdisciplinary Research, Soochow University, Suzhou 2.5006, china

＜正＞Generating high density-multiplied nanopatterns through the directed self-assembly of block copolymers （BCPs） will significantly influence the current microelectronics and storage industries

关键词： Block Copolymer High Density Multiplication of Graphoepitaxy Self Assembly

Recent progresses on the new condensed forms of single-walled carbon nanotubes and energy-harvesting devices

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Science Bulletin 2012年第Z1期 181-186页

作者： CHEN MinJiang1,2.YU Fang1,HU LiJun1 & SUN LianFeng1* 1 National center for Nanoscience and Technology,Beijing 100190,china 2.Graduate School of {2. Academy of sciences,Beijing 10004.,china

We demonstrate an effective method to prepare a new condensed form of single-walled carbon nanotubes(crystal of SWNTs) using a series of diamond wire drawing dies.X-ray diffraction indicates that the SWNTs form a two-dimensional triangular lattice with a lattice constant of 19.62.?.An intertube spacing of 3.39 ? of between adjacent SWNTs results in a sharp(002. reflection in the X-ray diffraction ***,we developed an approach based on the Coulomb explosion to separate SWNTs from their *** separated SWNTs have a typical length of several microns and form a nanotree at one end of the original *** separation is convenient and involves no *** studying devices comprising SWNTs,we find that a four-probe technique can be employed to study the filling of and flow within the inner channel of an individual ***/voltage can drive water molecules to have directional flow along an SWNT,and the flowing of water inside an SWNT can induce a voltage gradient force(an induced electromotive force) along the *** energy conversion is realized by the mutual coupling of water dipoles and charge carriers present in *** results suggest that SWNTs can be exploited as molecular channels for water and may find potential application in nanoscale energy ***,a surface-energy generator comprising SWNTs was demonstrated to harvest the surface energy of *** performance(the induction rate for Voc,the value of Voc and the output power) can be significantly enhanced by the Marangoni effect.

关键词： single-walled carbon nanotube(SWNT) crystal of SWNT SWNT tree energy conversion surface-energy generator

The new research on mitochondria

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The new research on mitochondria

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 sciences and Environmental sciences, 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

Characterization of the sequence distribution of poly （ethylene-co-vinyl acetate）with NMR spectroscopy

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Characterization of the sequence distribution of poly （ethy...

第四届全国高聚物分子表征学术讨论会

作者： Zhiqiang Su, Ying Zhao, Xiuqin Zhang, Shannong Zhu, Dujin Wang, Duanfu Xu State Key Laboratory of Polymer physics and Chemistry, Joint Laboratory of Polymer Science and Materials, center for Molecular Science, {2. of Chemistry, chinese Academy of {4., Beijing 100080, china

＜正＞ High-resolution NMR,either solution or solid-state spectra,can provideabundant structure information and has been paid more attention inrecent years, capable of elucidating not only the details of thechemical structure of a polymer,but also its dynamic *** help of high-resolution NMR techniques, the sequence distributionand condensed state of EVA copolymers can be clearly characterized,helping to further understand the structure-property correlations ofthe corresponding materials on a molecular level.

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Composition of substituents on pyrrole ring of high-carbon-number geoporphyrins and its dealkylation

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chinese Science Bulletin 1999年第3期44卷 267-269页

作者： ZHANG Chunming and LIN Renzi Geochemistry Research center, Jianghan Petroleum institute, Jingzhou 4.4.02.{2. Department of Geoscience, University of Petroleum , Beijing 100083,{2. Geochemistry Research center Jianghan Petroleum Institute Jingzhou China Department of Geoscience University of Petroleum Beijing China

Geoporphyrins, isolated from source rock, were analyzed on electron ionization mass spectrometry （EIMS） and Tandem mass spectrometry （MS/MS）. The spectrum of ElMS shows that the geoporphyrins are mainly composed of two types: DPEP and eito. Most of the porphyrin carbon numbers are greater than C32./sub>. The daughter spectra of the molecular ions (C34.36DPEPs) display the loss of methyl and ethyl groups, which indicate there are ethyl and propyl groups in the mother ions. The average condensed structural formulae, derived from the data of the spectra on MS/MS, have clearly shown the composition of the substituents on the porphyrin pyrrole ring, and the regular changes of the substituents reveal the characteristics of the dealkylation of the porphyrins in the geosphere.

关键词： Tandem mass spectrometry geoporphyrins condensed structural formula dealkylation.

Difference of Crystallization Processes Induced from the Mechanical Milling and Annealing under Normal and High Pressure in Amorphous Fe-N Alloy

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Difference of Crystallization Processes Induced from the Mec...

18th International Conference on High Pressure Science and Technology

作者： Li Liu Bin Yao Shu-E Liu.Xu-Dong Zhao.Wen-Hui Su Department of physics Jilin University Changckun 13002. P. R. china Department of Material Science Faculty of Science National University of Singapore Singapore 1192.0.{2. for condensed matter and Radiation physics china {2. of Advanced Science and Technology (World Lab) PO Box 8730 Beijing 100080 P. R. china

＜正＞ Based on crystallization thermodynamics and kinetics, crystallization products of amorphous alloys are mainly influenced by pressure, temperature and composition, and the crystallization temperature is affected by pressure and composition. However, only the effects of temperature and composition on mechanical crystallization were considered in previously reported works. In order to confirm the effect of high local pressure on crystallization of amorphous Fe-N alloy, an amorphous Fe-N alloy was prepared by ball milling of a mixture of Fe and hexagonal boron nitride. Its crystallization processes were studied in the case of mechanical milling （MM） and annealing under normal and high pressure. The 2.h-milled sample containing amorphous Fe-N was annealed for In under pressures of 2.to 4.Pa and at temperatures ranging from 580K to 1170K.. XRD showed the result of the difference between MM process and thermal crystallization process. It crystallizes to e-FexN containing N content much less than its lower composition limit of 2.at% under normal pressure during MM and annealing under high pressure, while it transforms into γ-Fe4. during annealing under normal pressure. It was demonstrated in the present experiment that the ε-FexN with lower N content is a thermodynamic stable state under pressures of 3 to 4.GPa and at temperatures from 690K to 800K, though it is not under normal pressure. Therefore, the difference in crystallization product between mechanical and thermal crystallization is attributed to the effects of local pressure and local temperature on thermodynamic stable state of Fe-N alloy.

关键词： Fe-N alloy Crystallization High pressure.

衬底对化学气相沉积法制备氧化硅纳米线的影响

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物理学报 2003年第2期52卷 454-458页

作者：闫小琴刘祖琴唐东升慈立杰刘东方周振平梁迎新袁华军周维亚王刚中国科学院物理研究所中国科学院凝聚态物理中心北京100080

通过化学气相沉积法在不同衬底上制备了大量的氧化硅纳米线 .选用衬底为Si片、带有约 10 0nm厚SiO2.氧化层Si片和石英片 .利用场发射扫描电子显微镜 (SEM)和透射电镜 (TEM ,配备有能谱仪 )对样品的表面形貌、结构和成分进行研究 .结果表... 详细信息

通过化学气相沉积法在不同衬底上制备了大量的氧化硅纳米线 .选用衬底为Si片、带有约 10 0nm厚SiO2.氧化层Si片和石英片 .利用场发射扫描电子显微镜 (SEM)和透射电镜 (TEM ,配备有能谱仪 )对样品的表面形貌、结构和成分进行研究 .结果表明 :这些纳米线都为非晶态 ,但在不同衬底上生长的纳米线形貌、尺寸和化学成分不同 .讨论了各种衬底对不同特征氧化硅纳米线生长的影响 .

关键词：衬底氧化硅化学气相沉积纳米线纳米颗粒纳米材料

The Production and Release of CFCs from Coal Combustion

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 81-85页

作者： LI Jiaxi, WANG Junzhi, LI Hong, RAO Zhu, LI Qi and LUO Songguang National Research center of Geoanalysis, chinese Academy of Geological {2., Beijing 100037 chinese Acad Geol Sci Natl Res Ctr Geoanal Beijing 100037 Peoples R China

The destruction of the ozone layer in the atmosphere caused by industriallysynthesized CFCs has aroused greatest concerns from the international society, but the CFCs formedfrom burning of coal containing fluorine have not been recognized by the world yet. In the presentstudy, we condensed the gas through cold traps and used the GC-MS to measure the gas composition,and found that the content of CFC-12.in the smog from coal combustion was significantly higher thanthe background value of the local atmosphere. This proves that CFC- 12.is formed in the process ofcoal combustion. This paper discusses a new source of non-synthesized CFCs.

关键词： CFC-12.in coal combustion measurement of CFC-12 halo hydrocarbons fromcoal

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氧化物超导体的高压热处理及烧结

高压物理学报 1988年第2期2卷 159-164页

作者：黄新明崔长庚陈红徐小平何寿安王文魁中国科学院物理研究所凝聚态和辐射物理分中心中国高等科学技术中心

本文利用高温高压条件,对氧化物超导体进行了不同条件的高压热处理及烧结。发现对SrLa（CuAg）1Ox在空气中烧结的超导体,适当条件的高压热处理,使Tc从2.K提高到2.K。在Y1Ba2.u3O7-d系氧化物中,无论是对空气中烧结的已超导样品的高压热处... 详细信息

本文利用高温高压条件,对氧化物超导体进行了不同条件的高压热处理及烧结。发现对SrLa（CuAg）1Ox在空气中烧结的超导体,适当条件的高压热处理,使Tc从2.K提高到2.K。在Y1Ba2.u3O7-d系氧化物中,无论是对空气中烧结的已超导样品的高压热处理,或者直接在高压下烧结样品,均未使Tc得到提高,但是,经过高压烧结,超导样品的硬度显著提高,密度也有所增加,并且改变了超导相的晶格常数。

关键词：氧化物超导体高压烧结临界温度晶格常数