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Journal of Nanotechnology
Volume 2012, Article ID 969357, 5 pages
Research Article

Young's Modulus of Single-Crystal Fullerene C 𝟕 𝟎 Nanotubes

1Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8753, Japan
2Fullerene Engineering Group, Materials Processing Unit, National Institute for Materials Science, Namiki, Tsukuba 305-0044, Japan

Received 1 June 2011; Accepted 22 July 2011

Academic Editor: Ilia A. Solov'yov

Copyright © 2012 Tokushi Kizuka et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We performed bending tests on single-crystal nanotubes composed of fullerene C70 molecules by in situ 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 C60 nanotubes of the same outer diameter.