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We report nanostructure construction of two-crossing SWNTs fabricated by AFM manipulation. SWNTs used for this study were dissolved in water with the liquid surfactant TRITON/sup R/. The solution was dispersed on a Si substrate, and dipped into dichloroethane to clean up the surface of the SWNTs. Visualization and manipulation were performed in air using a(More)
We determined associations between bone health and the quantity and quality of habitual physical activity in a cohort of 172 free-living Japanese aged 65–83 years (76 men, 96 women). The number of steps taken and the intensity of physical activity were measured every 4 s throughout each 24-h period for 1 year, using a specially adapted accelerometer that(More)
Carbon nanotube has an extremely small diameter of the order of a few nanometers, and can be semiconducting or metallic, depending on its chirality. These facts make the nanotube a possible building block for the quantum dot and wire based device with dimensions which are not easily realized by using conventional microfabrication techniques. Although there(More)
Summary form only given. Recently, transport properties of quantum dots (QDs), fabricated mainly in Si or GaAs based material, have been extensively studied. InAs is unique material with a large g-factor and a small effective electron mass, and dose not have a surface depletion effect. Until now, two-dimensional electron gas (2DEG) has been realized in(More)
Single-electron devices (SEDs) based on Coulomb blockade (CB) effects have prominent features in terms of ultra-low power consumption and miniaturization to a molecular scale. The performance of the device gets better as the dot size gets small because they rely on the classical CB effect. The single-wall carbon nanotube (SWNT) is attractive material as a(More)
Single-electron devices (SEDs) based on Coulomb blockade (CB) effects have prominent features in terms of ultra-low power consumption and miniaturization to a molecular scale. Single-wall carbon nanotubes (SWNTs) may be a natural choice for a building block of SEDs because of their small diameter. Furthermore, SWNTs can behave as a single-electron(More)
Multiwall carbon nanotubes (MWNTs) are one of natural nano-size bricks. The MWNTs are conductive narrow wires, and would be useful materials for a component of nano-electronics. By building up the MWNT bricks, nano-scale device structures, which cannot be fabricated from three dimensional bulk materials, can be constructed. For the application of carbon(More)