Results 241 to 250 of about 4,127 (270)
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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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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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An environmentally friendly dispersion method for cup-stacked carbon nanotubes in a water system
Chemical Communications, 2010A dry process using VUV light was confirmed as a novel technique to attach functional groups onto cup-stacked carbon nanotubes and to develop their isolation in a water system without the use of dispersing agents.
Sun Hyung, Lee +8 more
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Damping Properties of Cups-Stacked Carbon Nanotubes (CSCNTs)/RTM6 Composites
Advanced Materials Research, 2012Carbon nanotubes have better physical and mechanical behaviors than the traditional materials, in this study cups-stacked carbon nanotubes (CSCNTs) were filled into epoxy nancomposites to fabricate CSCNTs/epoxy nanocomposites. RTM6 was used by epoxy resin system. The cups-stacked carbon nanotubes (CSCNTs) were dispersed into the RTM6 matrix.
Yan Liu +4 more
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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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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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Formation and atomic structure of boron nitride nanotubes with a cup-stacked structure
Solid State Communications, 2007Abstract Boron nitride (BN) nanotubes were synthesized by annealing Fe 4 N/B powder at 1000 ∘ C for 1 h in a nitrogen gas atmosphere, and large amounts of BN nanotubes with a cup-stacked structure were obtained after a purification process. The atomic structures of the cup-stacked BN nanotubes were investigated by high-resolution electron microscopy
Takeo Oku +4 more
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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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Atomic structures and stability of boron nitride nanotubes with a cup-stacked structure
Diamond and Related Materials, 2005Abstract Boron nitride (BN) nanotubes were prepared as mixtures of α-Fe 2 O 3 , B and carbon powders, followed by annealing at 1100 °C for 2 h on alumina boats in a furnace under nitrogen atmosphere. BN nanotubes with cup-stacked structures were observed by high-resolution electron microscopy, and molecular mechanics calculation showed that the ...
Atsushi Nishiwaki +3 more
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Influence of Cup Stacking on Hand-Eye Coordination and Reaction Time of Second-Grade Students
Perceptual and Motor Skills, 2004Cup stacking has been adopted recently by many physical education programs to enhance rudimentary motor skills such as hand-eye coordination and ambidexterity as well as quickness and concentration; however, no empirical evidence has been published to support these claims. We examined the influence of cup stacking on hand-eye coordination and reaction
Brian E, Udermann +3 more
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