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arXiv 2017年

作者： Mizutani, K. Niiyama, M. Nakano, T. Yosoi, M. Nozawa, Y. Ahn, D.S. Ahn, J.K. Chang, W.C. Chen, J.Y. Daté, S. Gohn, W. Hamano, H. Hashimoto, T. Hicks, K. Hiraiwa, T. Hotta, T. Hwang, S.H. Ishikawa, T. Joo, K. Jung, W.S. Kato, Y. Katsuragawa, H. Kim, M.H. Kim, S.H. Kohri, H. Kon, Y. Lee, H.S. Maeda, Y. Matsumura, Y. Mibe, T. Miyabe, M. Morino, Y. Muramatsu, N. Nakatsugawa, Y. Noumi, H. Ohashi, Y. Ohta, T. Oka, M. Park, J.B. Parker, J.D. Rangacharyulu, C. Ryu, S.Y. Sada, Y. Sawada, T. Shibukawa, T. Shiu, S.H. Sugaya, Y. Sumihama, M. Tanaka, S. Tokiyasu, A.O. Tomida, N. Tran, H.N. Tsunemi, T. Uchida, M. Ungaro, M. Yanai, Y. Department of Physics Kyoto University Kyoto606-8502 Japan Research Center for Nuclear Physics Osaka University Ibaraki Osaka567-0047 Japan RIKEN Institute of Physical and Chemical Research Wako Saitama351-0198 Japan Department of Physics Korea University Seoul02841 Korea Republic of Institute of Physics Academia Sinica Taipei11529 Taiwan Light Source Division National Synchrotron Radiation Research Center Hsinchu30076 Taiwan Japan Synchrotron Radiation Research Institute SayoHyogo679-5143 Japan Department of Physics University of Connecticut StorrsCT06269-3046 United States Department of Physics and Astronomy Ohio University AthensOH45701 United States Daejeon34113 Korea Republic of Research Center for Electron Photon Science Tohoku University Sendai Miyagi982-0826 Japan Kobayashi-Maskawa Institute Nagoya University Nagoya Aichi464-8602 Japan Department of Physics and Astronomy Seoul National University Seoul151-742 Korea Republic of Photon Therapy Center Fukui Prefectural Hospital Fukui910-8526 Japan TsukubaIbaraki305-0801 Japan Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Department of Radiology University of Tokyo Hospital Tokyo113-8655 Japan Neutron Science and Technology Center Comprehensive Research Tokai Ibaraki319-1106 Japan Department of Physics and Engineering Physics University of Saskatchewan SaskatoonSKS7N 5E2 Canada Physics Department University of Michigan Michigan48109-1040 United States Department of Physics University of Tokyo Tokyo113-0033 Japan Department of Education Gifu University Gifu501-1193 Japan Graduate School of Science Kyoto University Kyoto606-8502 Japan Department of Physics Tokyo Institute of Technology Tokyo152-8551 Japan

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Extracting the Redox Orbitals in Li Battery Materials with High-Resolution X-Ray Compton Scattering Spectroscopy

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Physical Review Letters 2015年第8期114卷 087401-087401页

作者： K. Suzuki B. Barbiellini Y. Orikasa N. Go H. Sakurai S. Kaprzyk M. Itou K. Yamamoto Y. Uchimoto Yung Jui Wang H. Hafiz A. Bansil Y. Sakurai Faculty of Science and Technology Gunma University Tenjin-cho Kiryu Gunma 376-8515 Japan Physics Department Northeastern University Boston Massachusetts 02115 USA Graduate School of Human and Environmental Studies Kyoto University Yoshida-nihonmatsu-cho Sakyo-ku Kyoto 606-8501 Japan Faculty of Physics and Applied Computer Science AGH University of Science and Technology aleja Mickiewicza 30 30-059 Krakow Poland Japan Synchrotron Radiation Research Institute SPring-8 1-1-1 Kouto Sayo Sayo Hyogo 679-5198 Japan Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA

We present an incisive spectroscopic technique for directly probing redox orbitals based on bulk electron momentum density measurements via high-resolution x-ray Compton scattering. Application of our method to spinel LixMn2O4, a lithium ion battery cathode material, is discussed. The orbital involved in the lithium insertion and extraction process is shown to mainly be the oxygen 2p orbital. Moreover, the manganese 3d states are shown to experience spatial delocalization involving 0.16±0.05 electrons per Mn site during the battery operation. Our analysis provides a clear understanding of the fundamental redox process involved in the working of a lithium ion battery.

关键词： LITHIUM cells COMPTON scattering X-ray spectroscopy LITHIUM ions ELECTRON delocalization

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ϕ photoproduction on the proton at Eγ=1.5–2.9GeV

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Physical Review C 2017年第6期96卷 062201(R)-062201(R)页

作者： K. Mizutani M. Niiyama T. Nakano M. Yosoi Y. Nozawa D. S. Ahn J. K. Ahn W. C. Chang J. Y. Chen S. Daté W. Gohn H. Hamano T. Hashimoto K. Hicks T. Hiraiwa T. Hotta S. H. Hwang T. Ishikawa K. Joo W. S. Jung Y. Kato H. Katsuragawa M. H. Kim S. H. Kim H. Kohri Y. Kon H. S. Lee Y. Maeda Y. Matsumura T. Mibe M. Miyabe Y. Morino N. Muramatsu Y. Nakatsugawa H. Noumi Y. Ohashi T. Ohta M. Oka J. B. Park J. D. Parker C. Rangacharyulu S. Y. Ryu Y. Sada T. Sawada T. Shibukawa S. H. Shiu Y. Sugaya M. Sumihama S. Tanaka A. O. Tokiyasu N. Tomida H. N. Tran T. Tsunemi M. Uchida M. Ungaro Y. Yanai Department of Physics Kyoto University Kyoto 606-8502 Japan Research Center for Nuclear Physics Osaka University Ibaraki Osaka 567-0047 Japan RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan Department of Physics Korea University Seoul 02841 Republic of Korea Institute of Physics Academia Sinica Taipei 11529 Taiwan Light Source Division National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Japan Synchrotron Radiation Research Institute Sayo Hyogo 679-5143 Japan Department of Physics University of Connecticut Storrs Connecticut 06269-3046 USA Department of Physics and Astronomy Ohio University Athens Ohio 45701 USA Korea Research Institute of Standards and Science (KRISS) Daejeon 34113 Republic of Korea Research Center for Electron Photon Science Tohoku University Sendai Miyagi 982-0826 Japan Kobayashi-Maskawa Institute Nagoya University Nagoya Aichi 464-8602 Japan Rare Isotope Science Project Institute for Basic Science Daejeon 34047 Korea Photon Therapy Center Fukui Prefectural Hospital Fukui 910-8526 Japan High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Department of Radiology The University of Tokyo Hospital Tokyo 113-8655 Japan Neutron Science and Technology Center Comprehensive Research Organization for Science and Society (CROSS) Tokai Ibaraki 319-1106 Japan Department of Physics and Engineering Physics University of Saskatchewan Saskatoon Saskatchewan S7N 5E2 Canada Physics Department University of Michigan Michigan 48109-1040 USA Department of Physics The University of Tokyo Tokyo 113-0033 Japan Department of Education Gifu University Gifu 501-1193 Japan Graduate School of Science Kyoto University Kyoto 606-8502 Japan Department of Physics Tokyo Institute of Technology Tokyo 152-8551 Japan

Differential cross sections at t=tmin and decay asymmetries for the γp→ϕp reaction have been measured using linearly polarized photons in the range 1.5 to 2.9 GeV. These cross sections were used to determine the Pomeron strength factor. The cross sections and decay asymmetries are consistently described by the t-channel Pomeron and pseudoscalar exchange model in the Eγ region above 2.37 GeV. In the lower energy region, an excess over the model prediction is observed in the energy dependence of the differential cross sections at t=tmin. This observation suggests that additional processes or interference effects between Pomeron exchange and other processes appear near the threshold region.

关键词： Diffractive production Photonuclear reactions Polarization phenomena Vector mesons

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Preparation of carbon nanotube ink via organic hydrazine treatment

Preparation of carbon nanotube ink via organic hydrazine tre...

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International Microsystems, Packaging, Assembly and Circuits technology (IMPACT)

作者： Li-Hung Liu Jhih-Syuan Teng Yao-Jane Hsu Pen-Cheng Wang Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan Graduate Program for Science and Technology of Synchrotron Light Source National Tsing Hua University Hsinchu Taiwan National Synchrotron Radiation Research Center Hsinchu Taiwan

ISBN: (纸本)9781479977284

In this study, we used four different hydrazines to react with CNTs to prepare CNT-based inks. We found that the ink with CNTs subjected to the 2,4-dinitrophenylhydrazine treatment exhibited much better dispersion property than the inks with CNTs treated with other organic hydrazines. In other words, within 3 days, all ink dispersions began to bundle and precipitate after the sample vials were left on the bench top in our lab, except the sample with CNTs treated with 2,4-dinitrophenylhydrazine. Most importantly, the ink sample with CNTs treated with 2,4-dinitrophenylhydrazine were still well dispersed even after the sample vial was left on the bench top for 6 months.

关键词： Carbon nanotubes Ink Dispersion Chemicals Surface treatment Films

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Expression, purification, crystallization, and preliminary X-ray crystallographic studies of the human adiponectin receptors, AdipoR1 and AdipoR2

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Journal of Structural and Functional Genomics 2015年第1期16卷 11-23页

作者： Tanabe, Hiroaki Motoyama, Kanna Ikeda, Mariko Wakiyama, Motoaki Terada, Takaho Ohsawa, Noboru Hosaka, Toshiaki Hato, Masakatsu Fujii, Yoshifumi Nakamura, Yoshihiro Ogasawara, Satoshi Hino, Tomoya Murata, Takeshi Iwata, So Okada-Iwabu, Miki Iwabu, Masato Hirata, Kunio Kawano, Yoshiaki Yamamoto, Masaki Kimura-Someya, Tomomi Shirouzu, Mikako Yamauchi, Toshimasa Kadowaki, Takashi Yokoyama, Shigeyuki RIKEN Systems and Structural Biology Center 1-7-22 Suehiro-cho Tsurumi-ku Yokohama 230-0045 Japan Department of Biophysics and Biochemistry and Laboratory of Structural Biology Graduate School of Science The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Division of Structural and Synthetic Biology RIKEN Center for Life Science Technologies 1-7-22 Suehiro-cho Tsurumi-ku Yokohama 230-0045 Japan RIKEN Structural Biology Laboratory 1-7-22 Suehiro-cho Tsurumi-ku Yokohama 230-0045 Japan Department of Cell Biology Graduate School of Medicine Kyoto University Yoshida-Konoe-cho Sakyo-ku Kyoto 606-8501 Japan JST Research Acceleration Program Membrane Protein Crystallography Project Yoshida-Konoe-cho Sakyo-ku Kyoto 606-8501 Japan Department of Chemistry Graduate School of Science Chiba University Yayoi-cho Inage Chiba 263-8522 Japan Division of Molecular Biosciences Membrane Protein Crystallography Group Imperial College London SW7 2AZ United Kingdom Diamond Light Source Harwell Science and Innovation Campus Chilton Didcot Oxfordshire OX11 0DE United Kingdom RIKEN SPring-8 Center Harima Institute Kouto Sayo 679-5148 Hyogo Japan Department of Diabetes and Metabolic Diseases Graduate School of Medicine The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Integrated Molecular Science on Metabolic Diseases 22nd Century Medical and Research Center The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan CREST Japan Science and Technology Agency Kawaguchi 332-0012 Saitama Japan

The adiponectin receptors (AdipoR1 and AdipoR2) are membrane proteins with seven transmembrane helices. These receptors regulate glucose and fatty acid metabolism, thereby ameliorating type 2 diabetes. The full-length human AdipoR1 and a series of N-terminally truncated mutants of human AdipoR1 and AdipoR2 were expressed in insect cells. In small-scale size exclusion chromatography, the truncated mutants AdipoR1Δ88 (residues 89–375) and AdipoR2Δ99 (residues 100–386) eluted mostly in the intact monodisperse state, while the others eluted primarily as aggregates. However, gel filtration chromatography of the large-scale preparation of the tag-affinity-purified AdipoR1Δ88 revealed the presence of an excessive amount of the aggregated state over the intact state. Since aggregation due to contaminating nucleic acids may have occurred during the sample concentration step, anion-exchange column chromatography was performed immediately after affinity chromatography, to separate the intact AdipoR1Δ88 from the aggregating species. The separated intact AdipoR1Δ88 did not undergo further aggregation, and was successfully purified to homogeneity by gel filtration chromatography. The purified AdipoR1Δ88 and AdipoR2Δ99 proteins were characterized by thermostability assays with 7-diethylamino-3-(4-maleimidophenyl)-4-methyl coumarin, thin layer chromatography of bound lipids, and surface plasmon resonance analysis of ligand binding, demonstrating their structural integrities. The AdipoR1Δ88 and AdipoR2Δ99 proteins were crystallized with the anti-AdipoR1 monoclonal antibody Fv fragment, by the lipidic mesophase method. X-ray diffraction data sets were obtained at resolutions of 2.8 and 2.4 Å, respectively. © 2015, The Author(s).

关键词： Adiponectin receptors AdipoR1 and AdipoR2 Antibody Crystallization Lipidic mesophase Membrane protein Purification

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Fabrication of graphene by electrochemical exfoliation in alkaline electrolytes

Fabrication of graphene by electrochemical exfoliation in al...

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作者： Chang, Li-Chung Hsieh, Yu-Chi Chen, Yong-Min Wu, Pu-Wei Lee, Jyh-Fu Graduate Program for Science and Technology of Accelerator Light Source China Department of Materials Science and Engineering National Chiao Tung University Hsin-Chu 30010 Taiwan Taiwan National Synchrotron Radiation Research Center Hsin-Chu 30076 Taiwan Taiwan

ISBN: (纸本)9781607685395

Fabrication of graphene was demonstrated by electrochemical exfoliation of graphite in an ammonium hydroxide solution. The processing parameter of applied voltage was optimized to accomplish graphene productivity and desired chemical composition. Images from the atomic force microscopy showed graphene sheets with lateral sizes of several hundred nanometers. Images from the transmission electron microscopy indicated the existence of stacked graphene sheets with thickness of a few graphene layers. Raman spectroscopy confirmed variation of assynthesized graphene and bulk graphite. X-ray photoemission spectroscopy suggested the formation of graphene oxide at large voltage. © 2014 The Electrochemical Society.

关键词： Graphene

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Characterization of magnetic properties of Sr2CuWO6 and Sr2CuMoO6

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Physical Review B 2014年第13期89卷 134419-134419页

作者： Sami Vasala Hassan Saadaoui Elvezio Morenzoni Omar Chmaissem Ting-Shan Chan Jin-Ming Chen Ying-Ya Hsu Hisao Yamauchi Maarit Karppinen Department of Chemistry Aalto University FI-00076 AALTO Finland Laboratory for Muon Spin Spectroscopy Paul Scherrer Institute CH-5232 Villigen PSI Switzerland Department of Physics Northern Illinois University DeKalb Illinois 60115 USA Materials Science Division Argonne National Laboratory Argonne Illinois 60439 USA National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Program for Science and Technology of Accelerator Light Source National Chiao Tung University Hsinchu 30076 Taiwan

In this work we examine the low-temperature magnetic properties of the two double-perovskite compounds Sr2CuWO6 and Sr2CuMoO6 using magnetic susceptibility, muon spin rotation and relaxation, and neutron powder diffraction measurements. Additionally, the most relevant spin exchange interaction constants are derived from ab initio electronic structure calculations, aided by x-ray absorption spectroscopy. The compounds exhibit quasi-two-dimensional magnetic properties, with broad maxima at Tmax = 83 and 95 K for Sr2CuWO6 and Sr2CuMoO6, respectively. However, three-dimensional long-range order takes place below TN = 24(1) and 28(2) K for Sr2CuWO6 and Sr2CuMoO6, respectively. Our results show that the low-dimensional magnetic correlations are mainly due to the significant next-nearest-neighbor interactions in the ab plane of the double-perovskite structure, whereas three-dimensional long-range magnetic order is caused by weaker next-nearest-neighbor interactions along the c axis. Next-nearest-neighbor interactions are also slightly frustrated by weaker nearest-neighbor interactions within the ab plane. Based on these results we predict the low-temperature magnetic structure in these compounds to be type-II antiferromagnetic order of the double-perovskite lattice.

关键词： MAGNETIC properties LOW temperatures OXIDE minerals PEROVSKITE MAGNETIC susceptibility

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Role of Valence Fluctuations in the Superconductivity of Ce122 Compounds

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Physical Review Letters 2014年第8期113卷 086403-086403页

作者： H. Yamaoka Y. Ikeda I. Jarrige N. Tsujii Y. Zekko Y. Yamamoto J. Mizuki J.-F. Lin N. Hiraoka H. Ishii K.-D. Tsuei T. C. Kobayashi F. Honda Y. Ōnuki RIKEN SPring-8 Center Sayo Hyogo 679-5148 Japan Department of Physics Okayama University Okayama 700-8530 Japan National Synchrotron Light Source II Brookhaven National Laboratory Upton New York 11973 USA Quantum Beam Center National Institute for Materials Science 1-2-1 Sengen Tsukuba 305-0047 Japan Graduate School of Science and Technology Kwansei Gakuin University Sanda Hyogo 669-1337 Japan Department of Geological Sciences The University of Texas at Austin Austin Texas 78712 USA Center for High Pressure Science and Technology Advanced Research (HPSTAR) Shanghai 201203 China National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Institute for Materials Research Tohoku University Oarai Ibaraki 311-1313 Japan Faculty of Science Ryukyu University Nakagami Okinawa 903-0213 Japan

Pressure dependence of the Ce valence in CeCu2Ge2 has been measured up to 24 GPa at 300 K and to 17 GPa at 18–20 K using x-ray absorption spectroscopy in the partial fluorescence yield. A smooth increase of the Ce valence with pressure is observed across the two superconducting (SC) regions without any noticeable irregularity. The chemical pressure dependence of the Ce valence was also measured in Ce(Cu1−xNix)2Si2 at 20 K. A very weak, monotonic increase of the valence with x was observed, without any significant change in the two SC regions. Within experimental uncertainties, our results show no evidence for the valence transition with an abrupt change in the valence state near the SC II region, challenging the valence-fluctuation mediated superconductivity model in these compounds at high pressure and low temperature.

关键词： PHOTOCONDUCTIVITY SUPERCONDUCTIVITY VALENCE (Chemistry) FLUORESCENCE SPECTRUM analysis

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Fabrication and ferroelectric properties of BiFeO3/LaNiO 3 artificial superlattice structures grown by radio-frequency magnetron-sputtering

Fabrication and ferroelectric properties of BiFeO3/LaNiO 3 a...

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作者： Liu, Yen-Ting Chiu, Shang-Jui Lee, Hsin-Yi Chen, San-Yuan Program for Science and Technology of Accelerator Light Source National Chiao Tung University Hsinchu Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan National Synchrotron Radiation Research Center Hsinchu Taiwan Department of Materials Science and Engineering National Chiao Tung University Hsinchu Taiwan

Symmetric superlattice structures of multiferroic BiFeO3 and conductive LaNiO3 sublayers were grown on a Nb-doped SrTiO 3 substrate with radio-frequency magnetron-sputtering. The formation of a superlattice structure was confirmed from the appearance of satellite lines on both sides of the main line in the X-ray diffraction pattern. X-ray measurements show that these superlattice films become subject to greater tensile stress along the c-axis and to increased compressive stress parallel to the surface plane with a decreasing thickness of the sublayer. The smaller is the thickness of the sublayer, the greater is the crystalline quality and the strain state. The hysteresis loops show a large leakage current at frequencies of 0.5 and 1 kHz;the polarization decreases with an increasing frequency. © 2012 Elsevier B.V.

关键词： X ray scattering

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Electronic structure of BaNi2P2 observed by angle-resolved photoemission spectroscopy

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Physical Review B 2014年第19期89卷 195138-195138页

作者： S. Ideta T. Yoshida M. Nakajima W. Malaeb H. Kito H. Eisaki A. Iyo Y. Tomioka T. Ito K. Kihou C. H. Lee Y. Kotani K. Ono S. K. Mo Z. Hussain Z.-X. Shen H. Harima S. Uchida A. Fujimori Department of Physics University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8568 Japan JST Transformative Research-Project on Iron Pnictides (TRIP) Chiyoda Tokyo 102-0075 Japan Institute for Solid State Physics (ISSP) University of Tokyo Kashiwa-no-ha Kashiwa Chiba 277-8581 Japan Photon Factory Institute of Materials Structure Science KEK Tsukuba Ibaraki 305-0801 Japan Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics Applied Physics and Stanford Synchrotron Radiation Laboratory Stanford University Stanford California 94305 USA Department of Physics Graduate School of Science Kobe University Kobe 657-8501 Japan

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of BaNi2P2 that shows a superconducting transition at Tc ∼ 2.5 K. We observed hole and electron Fermi surfaces (FSs) around the Brillouin zone center and corner, respectively, and the shapes of the hole FSs dramatically changed with photon energy, indicating strong three dimensionality. The observed FSs are consistent with band-structure calculations and de Haas-van Alphen measurements. The mass enhancement factors estimated in the normal state were m*/mb ≤ 2, indicating weak electron correlation compared to typical iron-pnictide superconductors. An electronlike Fermi surface around the Z point was observed in contrast with BaNi2As2 and may be related to the higher Tc of BaNi2P2.

关键词： PHOTOELECTRON spectroscopy PHOTOEMISSION PHOTOEMISSIVE devices FERMI surfaces CONDENSED matter CONDENSED matter physics

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