Energy Barrier for Disappearance of Buckling to Form a Plastic Bend in Carbon Nanotubes
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概要
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We have investigated the current-induced transformation from elastically buckled carbon nanotubes into plastically bent nanotubes with a large bending angle. For this study, C60-encapsulated single wall nanotubes were used, enabling the estimation of energy barriers in the process from the well known coalescence reactions. Increasing the current caused a sequential change: (a) coalescence of C60 molecules to form tube structures; (b) merging of the newly formed tubes with the original nanotube; (c) disappearance of buckling to form a plastic bend; and finally (d) sublimation of the nanotube. The order of the energy barriers for (a), (b), and (d) is consistent with the experimental results, which suggests that the observed structural change is caused by thermally activated reactions. The barrier for the disappearance of buckling to form the plastic bend is between 6.0 and 6.9 eV.
- 2007-11-25
著者
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Nakayama Yoshikazu
Department Of Electrical Engineering College Of Engineering University Of Osaka
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Akita Seiji
Department Of Physics And Electronics College Of Engineering University Of Osaka Prefecture
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Yoshikawa Yuya
Department Of Physics And Electronics Graduate School Of Engineering Osaka Prefecture University
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Hirahara Kaori
Department Of Mechanical Engineering Graduate School Of Engineering Osaka University
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Nakayama Yoshikazu
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
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Somada Hiroshi
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
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Nagataki Atsuko
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
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Akita Seiji
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
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Yoshikawa Yuya
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
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