Young's Modulus of Single-Crystal Fullerene Nanotubes

  • Tokushi Kizuka
    Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8753, Japan
  • Kun'ichi Miyazawa
    Fullerene Engineering Group, Materials Processing Unit, National Institute for Materials Science, Namiki, Tsukuba 305-0044, Japan
  • Takayuki Tokumine
    Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8753, Japan

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説明

<jats:p>We performed bending tests on single-crystal nanotubes composed of fullerene C<jats:sub>70</jats:sub>molecules by<jats:italic>in situ</jats:italic>transmission electron microscopy with measurements of loading forces by an optical deflection method. The nanotubes with the outer diameters of 270–470 nm were bent using simple-beam and cantilever-beam loading by the piezomanipulation of silicon nanotips. Young's modulus of the nanotubes increased from 61 GPa to 110 GPa as the outer diameter decreased from 470 nm to 270 nm. Young's modulus was estimated to be 66% of that of single-crystal C<jats:sub>60</jats:sub>nanotubes of the same outer diameter.</jats:p>

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