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  1. No Access

    Article

    Variable range hop** conduction and percolation networks in the pellets formed from pristine and boron-doped carbon nanohorn particles

    Resistivity of pelletized carbon nanohorn particles (CNHs) decreased immediately as the pressure for making the pellet increased. This behavior can be fitted by a power scaling relation with quasi-2-dimensiona...

    Y. Fukunaga, M. Harada, S. Bandow, S. Iijima in Applied Physics A (2009)

  2. No Access

    Article

    Correlation between diamagnetic susceptibility and electron spin resonance feature for various multiwalled carbon nanotubes

    Determination of the structural features is a fundamental subject in nanotube research. A simple method is proposed to evaluate the structure of multiwalled carbon nanotubes (MWNTs) having either the concentri...

    S. Bandow, S. Numao, M. **no, K. Hirahara, S. Iijima in Applied Physics A (2007)

  3. No Access

    Chapter and Conference Paper

    Mössbauer studies of mixed-valence spin-crossover iron complexes with a hexadentate tripod ligand

    The spin-crossover behaviors of mixed-valence iron compounds [FeIIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIILMe](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3LMe is a hexadentate N6 ...

    S. Iijima, F. Mizutani, O. Niwa, N. Matsumoto, Y. Sunatsuki, M. Kojima in ICAME 2005 (2007)

  4. No Access

    Article

    Enhancement of inner tube formation from peapods in de-pressurized inert gas environment

    C60 molecules encased in single-wall carbon nanotubes, so-called peapods, can be transformed into small-diameter tubes inside the host tubes after high-temperature heat treatment in vacuum at ∼1200 °C. Here, we r...

    Y. Fujita, N. Niwa, S. Bandow, S. Iijima in Applied Physics A (2006)

  5. No Access

    Article

    Mössbauer studies of mixed-valence spin-crossover iron complexes with a hexadentate tripod ligand

    The spin-crossover behaviors of mixed-valence iron compounds [FeIIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIILMe](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3L is a hexadentate N6 tr...

    S. Iijima, F. Mizutani, O. Niwa, N. Matsumoto, Y. Sunatsuki… in Hyperfine Interactions (2005)

  6. No Access

    Article

    Directed assembly of nanostructured carbon materials on to patterned polymer surfaces

    Directed assembly of single-walled carbon nanomaterials on to polymer surfaces has been achieved. The approach relies on selective interactions of the polymer functionalities with the surface structures presen...

    J. Zhu, M. Yudasaka, M. Zhang, J. Fan, D. Kasuya, S. Iijima in Applied Physics A (2005)

  7. No Access

    Article

    Laser vaporization synthesis of polyhedral graphite

    Polyhedral graphite (PG) particles have been synthesized by CO2 laser vaporization of graphite in high-pressure Ar gas (8×105 Pa). Faceted PG particles, ranging in size from 110 to 500 nm, have a turbostratic str...

    F. Kokai, K. Takahashi, D. Kasuya, A. Nakayama, Y. Koga, M. Yudasaka… in Applied Physics A (2003)

  8. No Access

    Article

    How accurate can the determination of chiral indices of carbon nanotubes be?

    We present a general and systematic method for determining the chiral indices of carbon nanotubes. This method relies on the semi-quantitative analysis of experimental selected area diffraction pattern intensi...

    M. Kociak, K. Hirahara, K. Suenaga… in The European Physical Journal B - Condense… (2003)

  9. No Access

    Article

    High-resolution electron microscopy of individual metallofullerene molecules on the dipole orientations in peapods

    Electron microscopy with atomic sensitivity enables us to obtain a direct image of the intra-molecular structure of metallofullerenes encapsulated inside single-walled carbon nanotubes. By a comparison of high...

    K. Suenaga, T. Okazaki, K. Hirahara, S. Bandow, H. Kato, A. Taninaka… in Applied Physics A (2003)

  10. No Access

    Article

    Causes of different catalytic activities of metals in formation of single-wall carbon nanotubes

    When single-wall carbon nanotubes (SWNTs) were formed by pulsed Nd:YAG laser ablation or arc discharge, the yield depended on the metal catalyst: NiCo> Ni∼NiFe≫Co∼Fe>Pd∼Pt. It appears that an effective catalys...

    M. Yudasaka, Y. Kasuya, F. Kokai, K. Takahashi, M. Takizawa, S. Bandow… in Applied Physics A (2002)

  11. No Access

    Chapter and Conference Paper

    Variation in Spin Direction Observed for Oxalate-Bridged Mn(II)-Fe(III) Systems

    The directions of spin alignment were estimated for A[Mn(II)Fe(III)(ox)3] compounds from their 57Fe Mössbauer spectra. The compounds with large templating cations, A+ = P(C6H5)4 + and As(C6H5)4 ...

    S. Iijima, F. Mizutani in Hyperfine Interactions (C) (2002)

  12. No Access

    Article

    Structure of single-wall carbon nanotubes purified and cut using polymer

    Following on from our previous report that a monochlorobenzene solution of polymethylmethacrylate is useful for purifying and cutting single-wall carbon nanotubes (SWNTs) and thinning SWNT bundles, we show in ...

    M. Zhang, M. Yudasaka, A. Koshio, C. Jabs, T. Ichihashi, S. Iijima in Applied Physics A (2002)

  13. No Access

    Article

    Growth of single-wall carbon nanotubes dependent on laser power density and ambient gas pressure during room-temperature CO2 laser vaporization

    Single-wall carbon nanotubes (SWNTs) were synthesized by the irradiation of 20-ms CO2 laser pulses onto a graphite–Co/Ni target at room temperature. We investigated the effect of laser power density (10–150 kW/cm

    F. Kokai, K. Takahashi, D. Kasuya, M. Yudasaka, S. Iijima in Applied Physics A (2001)

  14. No Access

    Article

    Unique magnetism observed in single-wall carbon nanohorns

    The magnetic properties of single-wall carbon nanohorns (SWNH) were studied by electron spin resonance (ESR) and static magnetic susceptibility measurements. The SWNHs were ESR active with linewidth (ΔH) of ∼6...

    S. Bandow, F. Kokai, K. Takahashi, M. Yudasaka, S. Iijima in Applied Physics A (2001)

  15. No Access

    Article

    Evidence for anomalously small charge transfer in doped single-wall carbon nanohorn aggregates with Li, K and Br

    Chemical do** of single-wall carbon nanohorns (SWNHs) with K and Br was examined by vapor-phase reaction and studied by Raman scattering. Electro-chemical Li-ion do** using an electrolyte of LiAsF6 in a mixtu...

    S. Bandow, A.M. Rao, G.U. Sumanasekera, P.C. Eklund, F. Kokai… in Applied Physics A (2000)

  16. No Access

    Article

    Effect of an organic polymer in purification and cutting of single-wall carbon nanotubes

    A mixture of as-grown single-wall carbon nanotubes (SWNTs) and a monochlorobenzene (MCB) solution of polymethylmethacrylate (PMMA) was sonicated and homogenized. As a result, SWNTs were separated from carbonac...

    M. Yudasaka, M. Zhang, C. Jabs, S. Iijima in Applied Physics A (2000)

  17. No Access

    Article

    Shadowgraphic and emission imaging spectroscopic studies of the laser ablation of graphite in an Ar gas atmosphere

    Laser ablation of graphite in an Ar atmosphere at 560 Torr was done using a nanosecond-pulse Nd:YAG laser (1064 nm) at a fluence of 12 J/cm2. Dynamics in the ejection of carbon species and in their confinement n...

    F. Kokai, K. Takahashi, K. Shimizu, M. Yudasaka, S. Iijima in Applied Physics A (1999)

  18. No Access

    Article

    Growth dynamics of carbon-metal particles and nanotubes synthesized by CO2 laser vaporization

    To study the growth of carbon-Co/Ni particles and single-wall carbon nanotubes (SWNTs) by 20 ms CO2 laser-pulse irradiation of a graphite-Co/Ni (1.2 at. %) target in an Ar gas atmosphere (600 Torr), we used emis...

    F. Kokai, K. Takahashi, M. Yudasaka, S. Iijima in Applied Physics A (1999)

  19. No Access

    Chapter and Conference Paper

    International Evaluation Cooperation Task 1.1: Intercomparison of Evaluated Files for 52Cr, 56Fe, and 58Ni

    The cross sections and energy and angular distributions in the JENDL-3, JEF-2/EFF-2, and ENDF/B-VI evaluations for 52Cr, 56Fe, and 58Ni are compared graphically. The purpose is to understand the reasons for obser...

    C. Y. Fu, D. C. Larson, D. M. Hetrick, H. Vonach… in Nuclear Data for Science and Technology (1992)

  20. No Access

    Chapter and Conference Paper

    JENDL-3 FP Nuclear Data Library

    Evaluation of neutron nuclear data for 172 nuclides from As to Tb has been made for JENDL-3. Evaluated quantities are the total, elastic and inelastic scattering, capture and threshold reaction cross sections,...

    T. Nakagawa, M. Kawai, S. Iijima, H. Matsunobu… in Nuclear Data for Science and Technology (1992)

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