▎ 摘　　要

NOVELTY - Several cylindrical graphene sheets are laminated along the axial direction to form tubes, such that the maximum diameter of the tube is 100nm or less. Several continuous hollow portions are formed in the center of the tube such that the aspect ratio is 105 or less. USE - For use in packing material, gasket, container, resistor, electroconductive fiber, wire, electromagnetic-wave shielding material, ink, coating material, adhesive agent, electrode of energy storage devices such as lithium ion secondary battery, lead storage battery, capacitor and fuel cell, for use in housing of domestic electrical appliance, vehicle, aeroplane, field emission display, electron microscope element, semiconductor element and composite material, for use as roll, brake components, tire, bearing, gearwheel pantograph. ADVANTAGE - The thermal conductivity, sliding property and chemical stability of the fine carbon fiber are high. Enables easy dispersion of the fiber, when mixed to the matrix material. DETAILED DESCRIPTION - The fiber is observed by an electron microscope at arbitrary positions. A contour-line fringe pattern is viewed through the microscope. An amorphous carbon is deposited in the outer surface of the fiber to a thickness of 10nm or less. The cross-sectional area of the carbocyclic-ring structured graphene sheet, changes along the axial direction. The difference between the maximum and minimum cross-sectional areas in the inner surface of the sheet is 1% or more. The specific surface area of the fine carbon fiber is 200m2/g or less. The magnetoresistance value of the fiber is negative relative to the change in magnetic flux density. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a synthesizing apparatus of the fine carbon fiber. (Drawing includes non-English language text).