Y. Murakami

Nonlinear Photoluminescence Excitation Spectroscopy of Carbon Nanotubes: Exploring the Upper Density Limit of One-Dimensional Excitons (2008)

Murakami, Y., Kono, J.

We have studied emission properties of high-density excitons in single-walled carbon nanotubes through nonlinear photoluminescence excitation spectroscopy. As the excitation intensity was increased,...

Frustration-driven successive metamagnetic transitions in TbB4 (2007)

Inami, T., Ohwada, K., Matsuda, Y. H., Ouyang, Z. W., Nojiri, H., Okuyama, D., ...

Resonant magnetic x-ray diffraction experiments on the Shastry-Sutherland lattice TbB$_4$ were carried out under strong pulsed magnetic fields up to 30 T. TbB$_4$ exhibits a multi-step magnetization...

Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic x-ray scattering (2007)

Ishii, K., Hoesch, M., Inami, T., Kuzushita, K., Ohwada, K., Tsubota, M., ...

We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of high-Tc cuprates. Momentum-resolved charge excitations in the CuO2 plane are examined from parent Mott insulators to...

Orbital Ordering Structures in (Nd,Pr)0.5Sr0.5MnO3 Manganite Thin Films on Perovskite (011) Substrates (2007)

Wakabayashi, Y., Bizen, D., Kubo, Y., Nakao, H., Murakami, Y., Nakamura, M., ...

Structural study of orbital-ordered manganite thin films has been conducted using synchrotron radiation, and a ground state electronic phase diagram is made. The lattice parameters of four manganite...

Momentum Dependent Charge Excitations of Two-Leg Ladder: Resonant Inelastic X-ray Scattering of (La,Sr,Ca)14Cu24O41 (2007)

Ishii, K., Tsutsui, K., Tohyama, T., Inami, T., Mizuki, J., Murakami, Y., ...

Momentum dependent charge excitations of a two-leg ladder are investigated by resonant inelastic x-ray scattering of (La,Sr,Ca)14Cu24O41. In contrast to the case of a square lattice, momentum...

Anisotropic Decay Dynamics of Photoexcited Aligned Carbon Nanotube Bundles (2006)

Hashimoto, Y., Murakami, Y., Maruyama, S., Kono, J.

We have performed polarization-dependent ultrafast pump-probe spectroscopy of a film of aligned single-walled carbon nanotube bundles. By taking into account imperfect nanotube alignment as well as...

Charge storage mechanism of nanostructured anhydrous and hydrous ruthenium-based oxides (2006)

Sugimoto, W, Yokoshima, K, Murakami, Y, Takasu, Y

Electrochemical supercapacitor behavior of nanoparticulate rutile-type Ru1-xVxO2 (2006)

Yokoshima, K, Shibutani, T, Hirota, M, Sugimoto, W, Murakami, Y, Takasu, Y

Performance of ternary PtRuRh/C electrocatalyst with varying Pt : Ru : Rh ratio for methanol electro-oxidation (2006)

Kawaguchi, T, Rachi, Y, Sugimoto, W, Murakami, Y, Takasu, Y

Electron impact on K+: mechanisms for extreme ultraviolet submission (2006)

Berrington, K. A., Nakazaki, S., Murakami, Y.

A series of R-matrix calculations on K+ is used to derive electron excitation and ionization cross sections. The excitation cross section to the 4s and 3d levels leading to the K+ 60.1, 60.8 and...

Fabrication of thin-film, flexible, and transparent electrodes composed of ruthenic acid nanosheets by electrophoretic deposition and application to electrochemical capacitors (2006)

Sugimoto, W, Yokoshima, K, Ohuchi, K, Murakami, Y, Takasu, Y

One-step induction of neurons from mouse embryonic stem cells in serum-free media containing vitamin B-12 and heparin (2006)

Yamazoe, H, Kobori, M, Murakami, Y, Yano, K, Satoh, M, Mizuseki, K, ...

Genetics of symboiosis in Lotus japonicus: Recombinant inbred lines, comparative genetic maps, and map position of 35 symbiotic loci (2006)

Sandal, N., Petersen, T. R., Murray, J., Umehara, Y., Karas, B., Yano, K., ...

Development of molecular tools for the analysis of the plant genetic contribution to rhizobial and mycorrhizal symbiosis has provided major advances in our understanding of plant-microbe...

Change in lattice modulation upon gigantic magnetoelectric transition in GdMnO3 and TbMnO3 (2005)

Arima, T., Goto, T., Yamasaki, Y., Miyasaka, S., Ishii, K., Tsubota, M., ...

Single-crystal synchrotron x-ray diffraction measurements in strong magnetic fields have been performed for magnetoelectric compounds GdMnO3 and TbMnO3. It has been found that the P || a...

High field x-ray diffraction study on a magnetic-field-induced valence transition in YbInCu4 (2005)

Matsuda, Y. H., Inami, T., Ohwada, K., Murata, Y., Nojiri, H., Murakami, Y., ...

We report the first high-field x-ray diffraction experiment using synchrotron x-rays and pulsed magnetic fields exceeding 30 T. Lattice deformation due to a magnetic-field-induced valence transition...

Novel Orbital Ordering induced by Anisotropic Stress in a Manganite Thin Film (2005)

Wakabayashi, Y., Bizen, D., Nakao, H., Murakami, Y., Nakamura, M., Ogimoto, Y., ...

We performed resonant and nonresonant x-ray diffraction studies of a Nd0.5Sr0.5MnO3 thin film that exhibits a clear first-order transition. Lattice parameters vary drastically at the metal-insulator...

Preparation of a transparent and flexible self-standing film of layered titania/isostearate nanocomposite (2005)

Matsumoto, T, Iyi, N, Kaneko, Y, Kitamura, K, Masaki, S, Imai, T, ...

Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry (2005)

Sugimoto, W, Aoyama, K, Kawaguchi, T, Murakami, Y, Takasu, Y

Synthesis of carbon nanotube peapods directly on Si substrates (2005)

Ohno, Y., Kurokawa, Y., Kishimoto, S., Mizutani, T., Shimada, T., Ishida, M., ...

Carbon nanotubes encapsulating fullerenes, peapods, have been synthesized directly on Si substrates. High-density and high-quality singe-walled carbon nanotubes (SWNTs) were grown on a SiO_2/Si...

Particle growth behavior of carbon-supported Pt, Ru, PtRu catalysts prepared by an impregnation reductive-pyrolysis method for direct methanol fuel cell anodes (2005)

Kawaguchi, T, Sugimoto, W, Murakami, Y, Takasu, Y

An agr-like two-component regulatory system in Lactobacillus plantarum is involved in production of a novel cyclic peptide and regulation of adherence (2005)

Sturme, M.H.J., Nakayama, J., Molenaar, D., Murakami, Y., Kunugi, R., Fujii, T., ...

We have analyzed a locus on the annotated Lactobacillus plantarum WCFS1 genome that showed homology to the staphylococcal agr quorum-sensing system and designated it lam for Lactobacillus agr-like...

Interaction of poly(styrene sulfonic acid) with the classical pathway of the serum complement system (2005)

Murakami, Y, Iwata, H, Kitano, E, Kitamura, H, Ikada, Y

Interaction of poly(styrene sulfonic acid) with the alternative pathway of the serum complement system (2005)

Murakami, Y, Iwata, H, Kitano, E, Kitamura, H, Ikada, Y

Collection of neural inducing factors from PA6 cells using heparin solution and their immobilization on plastic culture dishes for the induction of neurons from embryonic stem cells (2005)

Yamazoe, H, Murakami, Y, Mizuseki, K, Sasai, Y, Iwata, H

Momentum Dependence of Charge Excitations in the Electron-Doped Superconductor Nd1.85Ce0.15CuO4: a RIXS Study (2004)

Ishii, K., Tsutsui, K., Endoh, Y., Tohyama, T., Maekawa, S., Hoesch, M., ...

We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-Tc superconductor Nd1.85Ce0.15CuO4. The intraband and interband excitations across the...

Electrical and magnetic properties of ion-exchangeable layered ruthenates (2004)

Sugimoto, W, Omoto, M, Yokoshima, K, Murakami, Y, Takasu, Y

d-f Coulomb and quadrupole-strain interactions in DyB2C2 observed by resonant x-ray scattering (2004)

Matsumura, T., Okuyama, D., Oumi, N., Hirota, K., Nakao, H., Murakami, Y., ...

Experimental evidence of the d-f Coulomb interaction responsible for the resonant x-ray scattering (RXS) from antiferroquadrupolar order in DyB2C2 is presented. The energy dependences of the RXS...

Mott gap excitations in twin-free YBa2Cu3O7-d (Tc = 93 K) studied by RIXS (2004)

Ishii, K., Tsutsui, K., Endoh, Y., Tohyama, T., Kuzushita, K., Inami, T., ...

Mott gap excitations in the high-Tc superconductor of the optimal doped YBa2Cu3O7-d (Tc = 93 K) have been studied by the resonant inelastic x-ray scattering method. Anisotropic spectra in the...

Optical and electric properties of Nb-doped anatase TiO2 single crystal (2004)

関谷, 隆夫, DasMulmi, D., Sekiya, Takao, Kamiya, N., Kurita, S., Murakami, Y., ...

Nb-doped anatase TiO2 single crystal has been grown by chemical vapour transport method. Raman spectra shows that the obtained crystal with Nb of 0.08 wt% has typical anatase structure. An absorption...

Resonant inelastic x-ray scattering study of hole-doped manganites La1-xSrxMnO3 (x=0.2 and 0.4) (2004)

Ishii, K., Inami, T., Ohwada, K., Kuzushita, K., Mizuki, J., Murakami, Y., ...

Electronic excitations near the Fermi energy in the hole doped manganese oxides (La1-xSrxMnO3, x=0.2 and 0.4) have been elucidated by using the resonant inelastic x-ray scattering (RIXS) method. A...

Reply to "Comment on 'X-ray resonant scattering studies of orbital and charge ordering in Pr1-xCaxMnO3'" (2003)

Von Zimmermann, M., Grenier, S., Nelson, C. S., Hill, J. P., Gibbs, D., Blume, M., ...

Deposition of complement protein C3b on mixed self-assembled monolayers carrying surface hydroxyl and methyl groups studied by surface plasmon resonance (2003)

Hirata, I, Hioko, Y, Toda, M, Kitazawa, T, Murakami, Y, Kitano, E, ...

Effect of adsorbent of Riposorber (TM), a cellulose microparticle with immobilized dextran sulfate, on the serum complement system (2003)

Murakami, Y, Kitano, E, Kitamura, H, Iwata, H

Attenuated total reflection of the rubidium D-2 line in optically dense vapor (2003)

Tojo, S, Murakami, Y, Hasuo, M, Fujimoto, T

Dextran sulfate as a material for the preparation of a membrane for immunoisolation (2003)

Murakami, Y, Iwata, H, Kitano, E, Kitamura, H, Ikada, Y

Mechanism of the ferroelectric phase transitions in LiNbO3 and LiTaO3 (2002)

Ohkubo, Y, Murakami, Y, Saito, T, Yokoyama, A, Uehara, S, Kawase, Y

Mechanism of the ferroelectric phase transitions in LiNbO3 and LiTaO3 (2002)

Ohkubo, Y., Murakami, Y., Saito, T., Yokoyama, A.

The temperature dependences of the nuclear-electric-quadrupole frequency vQ of 117In doped in LiTaO3 (TC5938 K) and Li12xInx/3TaO3 with x50.2 (TC5818 K) show that the order-disorder of the Li ions is...

Metal fatigue: effects of small defects and nonmetallic inclusions (2002)

Murakami, Y

Orbital excitations in CMR progenitor of LaMnO3 studied by resonant inelastic x-ray scattering (2001)

Inami, T., Ishihara, S., Kondo, H., Mizuki, J., Fukuda, T., Maekawa, S., ...

We report resonant inelastic x-ray scattering experiments of the orbital ordered manganite LaMnO3. When the incident photon energy is tuned near the Mn K absorption edge, the spectra reveal three...

Orbital Correlations in Doped Manganites (2001)

Hill, J. P., Nelson, C. S., Zimmermann, M. V., Gibbs, D., Casa, D., ...

We review our recent x-ray scattering studies of charge and orbital order in doped manganites, with specific emphasis on the role of orbital correlations in Pr_1-xCa_xMnO_3. For x=0.25, we find an...

The "devil's staircase" type phase transition in NaV2O5 under high pressure (2001)

Ohwada, K., Fujii, Y., Takesue, N., Isobe, M., Ueda, Y., Nakao, H., ...

The "devil's staircase" type phase transition in the quarter-filled spin-ladder compound NaV2O5 has been discovered at low temperature and high pressure by synchrotron radiation x-ray diffraction. A...

A Resonant X-ray Scattering Study of Octahedral Tilt Ordering in LaMnO$_3$ and Pr$_{1-x}$Ca$_x$MnO$_3$ (2001)

Zimmermann, M. V., Nelson, C. S., Hill, J. P., Gibbs, Doon, Nakao, H., ...

We report an x-ray scattering study of octahedral tilt ordering in the manganite series Pr$_{1-x}$Ca$_x$MnO$_3$ with x=0.4 and 0.25 and in LaMnO$_3$. The sensitivity to tilt ordering is achieved by...

Orbital correlations in doped manganites (2001)

Hill, J. P., Nelson, C. S., Von Zimmermann, M., Kim, Y. J., Gibbs, D., Casa, D., ...

X-ray resonant scattering studies of orbital and charge ordering in Pr1-xCaxMnO3 (2001)

Von Zimmermann, M., Nelson, C. S., Hill, J. P., Gibbs, D., Blume, M., Casa, D., ...

X-ray resonant scattering studies of charge and orbital ordering in Pr1-xCaxMnO3 (2001)

V. Zimmenmann, M., Nelson, C.S., Hill, J.P., Gibbs, D., Blume, M., Casa, D., ...

Successful subcutaneous pancreatic islet transplantation using an angiogenic growth factor-releasing device (2001)

Kawakami, Y, Iwata, H, Gu, YJ, Miyamoto, M, Murakami, Y, Balamurugan, AN, ...

Interaction of poly(2-acrylamido 2-methylpropane sulfonate)-grafted polystyrene beads with cationic complement proteins (2001)

Murakami, Y, Iwata, H, Kitano, E, Kitamura, H, Ikada, Y

Functional comparison of the single-layer agarose microbeads and the developed three-layer agarose microbeads as the bioartificial pancreas: An in vitro study (2001)

Xu, BY, Iwata, H, Miyamoto, M, Balamurugan, AN, Murakami, Y, Cui, WX, ...

Observation of the antiferroquadrupolar order in DyB2C2 by resonant x-ray scattering (2000)

Matsumura, T., Oumi, N., Hirota, K., Nakao, H., Murakami, Y., Wakabayashi, Y., ...

We have investigated the antiferroquadrupolar(AFQ) order in DyB$_2$C$_2$ by resonant x-ray scattering. X-rays with energies near the $L_3$ absorption edge of Dy were employed. Superlattice peaks that...

X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr$_{1-x}$Ca$_x$MnO$_3$ (2000)

Zimmermann, M. V., Nelson, C. S., Hill, J. P., Gibbs, Doon, Blume, M., Casa, D., ...

We present the results of a systematic x-ray scattering study of the charge and orbital ordering in the manganite series Pr$_{1-x}$Ca$_x$MnO$_3$ with $x$=0.25, 0.4 and 0.5. The temperature dependence...

X-ray Anomalous Scattering Study of a Charge-Ordered State in NaV2O5 (2000)

Nakao, H., Ohwada, K., Takesue, N., Fujii, Y., Isobe, M., Ueda, Y., ...

Charge ordering of V4+ and V5+ in NaV2O5 has been studied by an X-ray diffraction technique using anomalous scattering near a vanadium K-absorption edge to critically enhance a contrast between the...

3rd Engineering Foundation International Conference (2000)

Ritchie, R O, Murakami, Y, Ravichandran, K S

Interplay of charge, orbital and magnetic order in Pr1–xCaxMnO3 (2000)

Zimmermann, M.V., Hill, J.P., Gibbs, D., Blume, M., Casa, D., Keimer, B., ...

Modified subcutaneous tissue with neovascularization is useful as the site for pancreatic islet transplantation (2000)

Kawakami, Y, Iwata, H, Gu, YJ, Miyamoto, M, Murakami, Y, Yamasaki, T, ...

A two-dimensional simulation of pulsed discharge for a color DC-type plasma display panel (2000)

Murakami, Y, Matsuzaki, H, Murakami, H, Tachibana, K

Study of complement activation on well-defined surfaces using surface plasmon resonance (2000)

Hirata, I, Morimoto, Y, Murakami, Y, Iwata, H, Kitano, E, Kitamura, H, ...

Different Crystal Chemistries of the 117Cd→117In and 111mCd→111Cd Probes in LiNbO3 and LiTaO3 Studied by Time-Differential Perturbed-Angular-Correlation Technique (1999)

Ohkubo, Y., Murakami, Y., Saito, T., Yokoyama, A.

The temperature dependences of the nuclear-electric-quadrupole frequency vQ of 117In doped in LiTaO3 (TC5938 K) and Li12xInx/3TaO3 with x50.2 (TC5818 K) show that the order-disorder of the Li ions is...

Direct Observation of Antiferro-Quadrupolar Ordering - Resonant X-ray Scattering Study of DyB2C2 (1999)

Hirota, K., Oumi, N., Matsumura, T., Nakao, H., Wakabayashi, Y., Murakami, Y., ...

Antiferroquadrupolar (AFQ) ordering has been conjectured in several rare-earth compounds to explain their anomalous magnetic properties. No direct evidences for AFQ ordering, however, have been...

Interplay between charge, orbital and magnetic order in Pr_{1-x}Ca_xMnO_3 (1999)

Zimmermann, M. V., Hill, J. P., Gibbs, Doon, Blume, M., Casa, D., Keimer, B., ...

We report resonant x-ray scattering studies of charge and orbital order in Pr_{1-x}Ca_{x}MnO_3 with x=0.4 and 0.5. Below the ordering temperature, T_O=245 K, the charge and orbital order intensities...

Transition between two ferromagnetic states driven by orbital ordering in La_{0.88}Sr_{0.12}MnO_3 (1999)

Endoh, Y., Hirota, K., Ishihara, S., Okamoto, S., Murakami, Y., Nishizawa, A., ...

A lightly doped perovskite mangantite La_{0.88}Sr_{0.12}MnO_3 exhibits a phase transition at T_{OO}=145 K from a ferromagnetic metal (T_C=172 K) to a novel ferromagnetic insulator.We identify that...

Collection, Evaluation and Utilization of Oilseed Mustard (Brassica juncea L.) in Pakistan (1999)

A. Iwabuchi, Y. Murakami, T. Suzuki, K. Takayanagi

In order to assess the potential of oilseed mustard in the breeding programs, 52 accessions were grown in the field and characterized for different morphological characteristics. The germplasm was...

Interplay between charge, orbital and magnetic order in Pr1-xCaxMnO3. (1999)

Von Zimmermann, M., Hill, J. P., Gibbs, D., Blume, M., Casa, D., Keimer, B., ...

Collection, Evaluation and Utilization of Oilseed Mustard (Brassica juncea L.) in Pakistan (1999)

Rabbani M. A., A. Iwabuchi, Y. Murakami, T. Suzuki, K. Takayanagi

In order to assess the potential of oilseed mustard in the breeding programs, 52 accessions were grown in the field and characterized for different morphological characteristics. The germplasm was...

Field Induced Transition from Metal to Insulator in the CMR Manganites (1998)

Endoh, Y., Nojiri, H., Kaneko, K., Hirota, K., Fukuda, T., Kimura, H., ...

The gigantic reduction of the electric resistivity under the applied magnetic field, CMR effect, is now widely accepted to appear in the vicinity of the insulator to metal transition of the...

EFFECTS OF ANTIMONY AND TIN ADDITIONS ON CHARACTERISTIC PROPERTIES OF NEW HIGH MAGNETIC PERMEABILITY ALLOY NIMALLOY IN THE SYSTEM OF NICKEL AND MANGANESE. (1998)

MASUMOTO,H., MURAKAMI,Y., HINAI,M.

EFFECT OF ADDITION OF MOLYBDENUM ON CHARACTERISTIC PROPERTIES OF NEW HIGH-MAGNETIC PERMEABILITY ALLOYS NIMALLOY IN THE SYSTEM OF NICKEL AND MANGANESE. (1998)

MASUMOTO,H., KOBAYASHI,T., MURAKAMI,Y.

EFFECT OF MOLYBDENUM ADDITIONS ON CHARACTERISTIC PROPERTIES OF NEW HIGH PERMEABILITY ALLOYS NIMALLOY IN THE SYSTEM OF NICKEL AND MANGANESE. (1998)

MASUMOTO,H., KOBAYASHI,T., MURAKAMI,Y.

Microstructure Change During High Strain Rate Superplastic Deformation in a PM 7475 Al-0.7Zr Alloy. (1998)

Matsuki, K., Tokizawa, M., Murakami, Y.