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Title: Strength of carbon nanotubes depends on their chemical structures
Authors: Takakura, Akira
Beppu, Ko
Nishihara, Taishi
Fukui, Akihito
Kozeki, Takahiro
Namazu, Takahiro
Miyauchi, Yuhei
Itami, Kenichiro
Author's alias: 高倉, 章
別府, 幸
西原, 大志
福井, 章人
小関, 貴裕
生津, 資大
宮内, 雄平
伊丹, 健一郎
Keywords: Carbon nanotubes and fullerenes
Issue Date: 10-Jul-2019
Publisher: Springer Nature
Journal title: Nature Communications
Volume: 10
Thesis number: 3040
Abstract: Single-walled carbon nanotubes theoretically possess ultimate intrinsic tensile strengths in the 100–200 GPa range, among the highest in existing materials. However, all of the experimentally reported values are considerably lower and exhibit a considerable degree of scatter, with the lack of structural information inhibiting constraints on their associated mechanisms. Here, we report the first experimental measurements of the ultimate tensile strengths of individual structure-defined, single-walled carbon nanotubes. The strength depends on the chiral structure of the nanotube, with small-diameter, near-armchair nanotubes exhibiting the highest tensile strengths. This observed structural dependence is comprehensively understood via the intrinsic structure-dependent inter-atomic stress, with its concentration at structural defects inevitably existing in real nanotubes. These findings highlight the target nanotube structures that should be synthesized when attempting to fabricate the strongest materials.
Description: 引っ張りに強いカーボンナノチューブの構造を特定 --軽量で高強度な究極の構造材料の実現に一歩近づく--. 京都大学プレスリリース. 2019-07-11.
Rights: © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
URI: http://hdl.handle.net/2433/242959
DOI(Published Version): 10.1038/s41467-019-10959-7
Related Link: http://www.kyoto-u.ac.jp/ja/research/research_results/2019/191710_1.html
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