| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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This paper has been withdrawn by the first author due to misconduct, see Chin. Phys. Lett. 26, 079901, 2009 In Situ Tests of Multiwalled Carbon Nanotubes with Strength Close to Theoretical Predictions |
| PENG Bei1, Horacio D. Espinosa2 |
| 1Center for Micro and Nano Electromechanical Systems, University of Electronic Science and Technology of China, Chengdu 6100542Micro and Nano Mechanics Laboratory, Northwestern University, Illinois 60208, USA |
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| Cite this article: |
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PENG Bei, Horacio D. Espinosa 2009 Chin. Phys. Lett. 26 016104 |
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Abstract Using MEMS technology and transmission electron microscopy we show experimentally multiwalled carbon nanotubes with a mean fracture strength of larger than 100GPa, which exceeds the earlier observations by a factor of approximately 3. These results are in excellent agreement with quantum-mechanical estimations. This performance is made possible by omitting chemical treatments from the sample preparation process, thus avoiding the formation of defects. High-resolution imaging is used to directly determine the number of fractured shells and the chirality of the outer shell. Electron irradiation at 200keV for 10, 100 and 1800s lead to improvements of the maximum sustainable loads by factors of 2.4, 7.9 and 11.6 compared with non-irradiated samples of similar diameter. This effect is attributed to crosslinking between the shells. This procedure is a cost effective way of customizing the properties of multiwall nanotubes for many applications of interest ranging from nanocomposites to nanodevices.
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| Keywords:
61.46.Fg
62.20.M-
61.80.Fe
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Received: 26 September 2008
Published: 24 December 2008
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| PACS: |
61.46.Fg
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(Nanotubes)
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62.20.M-
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(Structural failure of materials)
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61.80.Fe
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(Electron and positron radiation effects)
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