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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 center for {2. matter Physics High Pressure Research center chinese academy of sciences P.O.Box 603 beijing 100080 P.R.china beijing Laboratory of Electron Microscopy institute of Physics center for {2. matter Physics chinese academy of sciences P.O.Box. 2.2. beijing 100080 P.R.china

＜正＞C3N4H4 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-C3N4）, 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 C3N4H4 treated by high temperature - high pressure. Experiments Synthesis experiments were performed with a six-anvil 600 ton high pressure device. The C3N4H4（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 C3N4H4 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 C3N4H4 Diamond Graphite

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Phase transition and chemical decomposition of liquid carbon dioxide and nitrogen mixture under extreme conditions

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chinese Physics B 2016年第2期25卷 312-319页

作者：姜晓旭陈冠宇李玉同程新路唐翠明 Institution of Atomic and Molecular Physics Sichuan University beijing National Laboratory for condensed {2. Physics Institute of Physics Chinese Academy of Sciences Technology Development center Central Semiconductor Manufacturing Corporation Department of Physics and Mathematics Sichuan University of Science and Engineering

Thermodynamic and chemical properties of liquid carbon dioxide and nitrogen（CO_（2.–）N_2. mixture under the conditions of extremely high densities and temperatures are studied by using quantum molecular dynamic（QMD） simulations based on density functional theory including dispersion corrections（DFT-D）. We present equilibrium properties of liquid mixture for 112.separate density and temperature points, by selecting densities ranging from ρ = 1.80 g/cm^3 to 3.40 g/cm^3 and temperatures from T = 500 K to 8000 K. In the range of our study, the liquid CO_（2.–）N_2.mixture undergoes a continuous transition from molecular to atomic fluid state and liquid polymerization inferred from pair correlation functions（PCFs）and the distribution of various molecular components. The insulator–metal transition is demonstrated by means of the electronic density of states（DOS）.

关键词： liquid CO2.N2.mixture quantum molecular dynamic (QMD) simulations DFT-D phase transi- tion

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Features of the type Ill-like source rock and its generated natural gas

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chinese Science Bulletin 2000年第9期45卷 857-861页

作者： ZHAO Mengjun, ZHANG Baomin, BIAN Lizeng, XIAO Zhongyao, LI Mei, PENG Yan & QIN Shengfei1. Research center of Exploration of TPEDB, CNPC, Korla 841000, china 2. Research {2. of Petroleum Exploration & Development, CNPC, beijing 100083, china 3. Department of Earth Science, Nanjing University, Nanjing 2.0002. china

The mother matter of Ordovician source are mainly sapropelic and generate oil in mature stage, since the high plants did not appear in Ordovician period, which is well known by internal and external scholars. Now we find a kind of Orodovician source rock generating mainly light oil and gas in mature stage during appraising source rocks in the Tarim Basin. The organic matters of this source rock are chiefly constructed by benthic brown algae in organisms (showing as macro algae), and are similar to humic source in hydrocarbon generation. The natural gas generated by this kind of source matters is obviously different from the sapropelic gas.

关键词： Ordovician type Ⅲ-like organic matters biomarkers natural gas.

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石墨烯量子霍尔平台与平台之间转变的标度律关系

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物理学报 2011年第10期60卷 585-588页

作者：谭振兵马丽刘广同吕力杨昌黎中国科学院物理研究所北京凝聚态物理国家实验室北京100190

在2.50K温度范围内测量了单层石墨烯量子霍尔平台与平台之间转变的标度律关系.发现石墨烯的标度律指数κ不是普适的,在低温段的κ大约是0.13,在高温段的κ大约是0.33.这一结果进一步验证了石墨烯中长程散射的主导地位.

关键词：石墨烯量子霍尔效应标度律

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Photocatalytic properties of BiOX(X=Cl,Br,and I)

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Rare Metals 2008年第3期27卷 243-250页

作者： AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying center of condensed {2. and Materials Physics School of Science Beihang University Beijing 100083 China

A novel series of photocatalysts, bismuth oxyhalide （BiOX, X = Cl, Br, and Ⅰ）, were synthesized by a hydrolysis method. The powder sampies were characterized by the use of X-ray diffraction （XRD）, scanning electron microscope, and UV-Vis spectrophotometer. The XRD pattern showed that all the BiOX were well crystallized in the tetragonal structure. The band gaps of the sheet-shaped compounds BiOX （X = Cl, Br, andⅠ） were 3.44, 2.76, and 1.85 eV, respectively. BiOBr showed the highest photocatalytic activity in degrading rhodamine B （RhB） and evolving 02.for its proper valence band （VB）. BiOI has no photocatalytic activity. BiOCl showed the highest activity in decomposing isopropanol because of electron-hole pair separation through trapping electrons by oxygen vacancies.

关键词： photocatalysis rhodamine B isopropanol O2.evolution BiOCl BiOBr BiOI

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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 434102.{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.

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Frequency-stabilized Yb：fiber comb with a tapered single-mode fiber

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chinese Physics B 2016年第4期25卷 166-170页

作者：谢阳韩海年张龙于子蛟朱政侯磊庞利辉魏志义 School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China beijing National Laboratory for condensed {2. Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

We demonstrate a stable Yb：fiber frequency comb with supercontinuum generation by using a specially designed tapered single-mode fiber, in which a spectrum spanning from 500 nm to 1500 nm is produced. The carrier-envelope offset signal of the Yb：fiber comb is measured with a signal-to-noise ratio of more than 40 dB and a linewidth narrower than 12. kHz. The repetition rate and carrier-envelope offset signals are simultaneously phase locked to a microwave reference frequency.

关键词： tapered single-mode fiber supercontinuum generation optical frequency comb

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A new way of transformation from a-quartz to coesite

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Progress in Natural Science:Materials International 2006年第10期16卷 1090-1097页

作者： SU Wenhui, LIU Shue, XU Dapeng, WANG Weiran, YAO Bin, GUO Xingyuan, LIU Zhiguo, and ZHONG Zheng ( center for the condensed {2. Science and Technology, Harbin institute of Technology, Harbin 150001, china center for Rare-Earth Solid State Physics, Jilin University, Changchun 13002., china International center for Materials Physics, chinese A-cademy of sciences, Shenyang 110015, china center for condensed {2. and Radiation Physics, china center of Advanced Science and Technology (World Laboratory), beijing 100080, china Department of Physics, University of Windsor, Windsor, ON N9B 3P4, Canada) center for Rare-Earth Solid State Physics Jilin University Changchun 130023 China International center for Materials Physics Chinese Academy of Sciences Shenyang 110015 China center for condensed {2. and Radiation Physics China Center of Advanced Science and Technology (World Laboratory) Beijing 100080 China center for the condensed {2. Science and Technology Harbin Institute of Technology Harbin 150001 China Department of Physics University of Windsor Windsor ON N9B 3P4 Canada

A laboratory method combining the high-energy mechanical ball milling and high static pressure has been suggested for modelling synthesis of coesite in the Earth's crust. A window of milling time, a mechanical collision-induced intermediate phase ofα-quartz and its condition of easily crystallizing into coesite under the condition of 3.0 GPa, 92. K, < 1.0 min have been discovered. The new method needs much shorter synthesizing time and lower synthesizing critical pressure than those used before. The Raman spectra for the coesite synthesized by the present method have covered all the information of those natural and synthesized coesites reported before. It is demonstrated that this method has a great potential in geo-science research and implied the other possible mechanism of coesite formation in the Earth's crust.

关键词： quartz-coesite high-energy mechanical ball milling high state pressure Raman spectrum metastable phase sub-duction-exhumation of plate.

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Developmental modes of the Neoproterozoic-Lower Paleozoic marine hydrocarbon source rocks in china

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Science Bulletin 2007年第S1期 77-91页

作者： ZHANG BaoMin1, ZHANG ShuiChang1, BIAN LiZeng2. JIN ZhiJun3 & WANG DaRui1 1 Research center of Petroleum Geology in Research institute of Petroleum Exploration and Development, Petro{2., beijing 100083, china 2.Department of Earth sciences, Nanjing University, Nanjing 2.0093, china 3 Research institute of Petroleum Exploration and Development, Sinopec, beijing 100083, china

Based on the researches on rock type, the mode of occurrence, diagnostic minerals and creatures, the sedimentary geochemistry and organic facies of chinese marine source rocks from wells and outcrops, and on the research findings of developmental modes of foreign marine source rock, the authors consider that it is impossible to objectively make clear the formation mechanism of hydrocarbon source rock with high organic matter abundance by either single mode of preservation or high organic matter productivity. According to the chinese geological features, the formation mechanism of the Neoproterozoic-Lower Paleozoic marine source rock is generalized into four modes, namely, thermal water activity-upwelling flow-anoxic; carbonate gentle slope-upwelling flow; xerothermic climate-brine euxinic milieu; and humid climate-retained euxinic milieu; as the Lower Cambrian undercompensation basin organic facies (the Tarim Basin, South china and southwestern margin of North china), carbonate gentle lime mud bound organic facies (the Upper Ordovician in Tazhong region of the Tarim Basin and the Lower Silurian in the Upper Yangtze Platform), the Middle Cambrian evaporation laggon organic facies (the Tarim Basin and the Upper Yangtze Platform), enclosed undercompensation terrigenous bay organic facies (the Middle-Upper Ordovician in the west of the Tarim Basin, the Lower Silurian Longmaxi Formation in the Upper Yangtze platform). chinese marine sedimentations with lower organic matter abundance are generalized into two modes of consumption-dilution mode of open epicontinental sea and depletion-dilution mode of supercompensation basin.

关键词： marine source rock upwelling flow anoxic event thermal water activity xerothermic climate-brine euxinic humid climate-retained euxinic

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Fabrication of CoFe Nanostructures by Holographic Lithography

Fabrication of CoFe Nanostructures by Holographic Lithograph...

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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

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