In situ tests of multiwalled carbon nanotubes with strength slose to theoretical predictions

Bei Peng*, D. Espinosa Horacio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Using MEMS technology and transmission electron microscopy we show experimentally multiwalled carbon nanotubes with a mean fracture strength of larger than 100 GPa, 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 200 keV 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.

Original languageEnglish (US)
Article number016104
JournalChinese Physics Letters
Volume26
Issue number1
DOIs
StatePublished - Jun 3 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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