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Evaluation of the Stiffness of Carbon Nanotube Probe by Force Curve Measurements

Published online by Cambridge University Press:  01 February 2011

Motoyuki Hirooka
Affiliation:
motoyuki.hirooka.bm@hitachi.com, Hitachi, Ltd., Materials Research Laboratory, 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Makoto Okai
Affiliation:
makoto.okai.ev@hitachi.com, Hitachi, Ltd., Materials Research Laboratory, 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Hiroki Tanaka
Affiliation:
htanaka@kyowa.hitachi.co.jp, Hitachi Kyowa Engineering Co., Ltd., 832-2, Horiguchi, Hitachinaka-shi, Ibaraki-ken, 312-8507, Japan
Satoshi Sekino
Affiliation:
s.sekino.zk@hitachi-kenki.com, Hitachi Kenki FineTech Co., Ltd., 650, Kandatsu-machi, Tsuchiura-shi, Ibaraki-ken, 300-0013, Japan
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Abstract

Buckling of arc discharge made multi-walled carbon nanotubes with various lengths was studied by alternating the length of a multi-walled nanotube by intermittent cutting. Buckling stresses were determined by measuring force-distance curves employing an atomic force microscope and the values were compared with those expected from the Euler's theoretical model. As the length of a nanotube was shortened, its buckling mode changed from elastic compressive bending with Young's modulus of 1.2TPa, to inelastic compressive fracture. The inelastic behavior observed for short nanotubes can be attributed to the buckling mechanism, in which ripple-like distortions develop along the nanotube sidewalls.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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