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Positronium Formation in Alkali Metal-intercalated Cup-stacked Carbon Nanofibers
Journal of the Physical Society of Japan, 2005Positrons injected into alkali metal-intercalated cup-stacked carbon nanofibers convert to positronium (Ps) atoms with a quite high yield of ca. 25%, which is insensitive to insertion of alkali metal intercalant layers and charge transfer from alkali metal to graphene sheets.
Hideoki Murakami +2 more
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Structure and basic properties of cup-stacked type carbon nanofiber
Molecular Crystals and Liquid Crystals, 2002Structural characterization of novel nanofibers, so called "cup-stacked type carbon nanofibers" with large hollow core and their potential applications are described as compared with those of tubular type of nanotubes and nanofibers. This novel carbon nanofiber containing peculiar features provide the variety of carbon nanotubes and nanofibers from ...
Takashi Yanagisawa +4 more
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Acta Radiologica, 2022
Background Existing state-of-the-art “safe zone” prediction methods are statistics-based methods, image-matching techniques, and machine learning methods. Yet, those methods bring a tension between accuracy and interpretability.
Fuchang Han +5 more
semanticscholar +1 more source
Background Existing state-of-the-art “safe zone” prediction methods are statistics-based methods, image-matching techniques, and machine learning methods. Yet, those methods bring a tension between accuracy and interpretability.
Fuchang Han +5 more
semanticscholar +1 more source
Occlusion of Hydrogen in Alkali Metal-Intercalated Cup-Stacked Carbon Nanofibers
Molecular Crystals and Liquid Crystals, 2006Hydrogen storage in alkali metal-graphite intercalation compounds (AGICs) prepared from cup-stacked carbon nanofibers (A-CNFs, A = K, Rb and Cs) was studied by means of thermal desorption of hydrogen. The hydrogen sorbed to stage-1 K-CNFs amounts to 0.067 dm3 (STP) per gram of carbon, most of which is fixed to KGIC as a chemical component.
Toshihiro Hiejima +3 more
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Effect of ball milling on morphology of cup-stacked carbon nanotubes
Chemical Physics Letters, 2002The effect of grinding on cup-stacked carbon nanotubes is studied. The application of a bending force on the sidewall of such carbon nanotubes, that is higher than the Van der Waals force acting between the cups, results in the shortening of carbon nanotubes and the formation of nano-barrels exhibiting an increased number of accessible active sites ...
Y.A. Kim +5 more
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A simple route to short cup-stacked carbon nanotubes by sonication
Carbon, 2010A simple but effective way of producing short cup-stacked carbon nanotubes with high quality is demonstrated using sonication in an ethanol/distilled water mixture. The substantial removal of amorphous carbon deposited on the truncated conical layer-stacked nanotubes by controlled air oxidation was a critical precondition to cut the nanotubes without ...
Daisuke Shimamoto +7 more
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Processing and characterization of epoxy nanocomposites reinforced by cup-stacked carbon nanotubes
Polymer, 2005The effect of the dispersion, ozone treatment and concentration of cup-stacked carbon nanotubes on mechanical, electrical and thermal properties of the epoxy/CSCNT nanocomposites were investigated. Ozone treatment of carbon fibers was found to increase the surface oxygen concentration, thereby causing the contact angle between water, epoxy resin and ...
Young-Kuk Choi +5 more
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Structural characterization of cup-stacked-type nanofibers with an entirely hollow core
Applied Physics Letters, 2002Straight long carbon nanofibers with a large hollow core obtained by a floating reactant method show a stacking morphology of truncated conical graphene layers, which in turn exhibit a large portion of open edges on the outer surface and also in the inner channels.
M. Endo +8 more
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Atomic structures of bamboo-type boron nitride nanotubes with cup-stacked structures
Journal of the European Ceramic Society, 2006Abstract Bamboo-type boron nitride (BN) nanotubes with cup-stacked structures were produced by annealing of Fe4N and boron particles at 1000 °C for 5 h in nitrogen atmosphere. The iron nitride particles were reduced to α-Fe. Atomic structure models and the formation mechanism were proposed from the results of high-resolution electron microscopy (HREM)
Takeo Oku +2 more
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