Compressive dynamic scission of carbon nanotubes under sonication: fracture by atomic ejection
| العنوان: | Compressive dynamic scission of carbon nanotubes under sonication: fracture by atomic ejection |
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| المؤلفون: | Huck Beng Chew, Myoung-Woon Moon, Kyung-Suk Kim, Kwang-Ryeol Lee |
| المصدر: | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 467:1270-1289 |
| بيانات النشر: | The Royal Society, 2010. |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Nanotube, Materials science, Tension (physics), Graphene, General Mathematics, Sonication, General Engineering, General Physics and Astronomy, Nanofluidics, Carbon nanotube, law.invention, Condensed Matter::Materials Science, law, Physics::Atomic and Molecular Clusters, Fracture (geology), Compression (geology), Composite material |
| الوصف: | We report that a graphene sheet has an unusual mode of atomic-scale fracture owing to its structural peculiarity, i.e. single sheet of atoms. Unlike conventional bond-breaking tensile fracture, a graphene sheet can be cut by in-plane compression, which is able to eject a row of atoms out-of-plane. Our scale-bridging molecular dynamics simulations and experiments reveal that this compressive atomic-sheet fracture is the critical precursor mechanism of cutting single-walled carbon nanotubes (SWCNTs) by sonication. The atomic-sheet fracture typically occurs within 200 fs during the dynamic axial buckling of a SWCNT; the nanotube is loaded by local nanoscale flow drag of water molecules caused by the collapse of a microbubble during sonication. This is on the contrary to common speculations that the nanotubes would be cut in tension, or by high-temperature chemical reactions in ultrasonication processes. The compressive fracture mechanism clarifies previously unexplainable diameter-dependent cutting of the SWCNTs under sonication. |
| تدمد: | 1471-2946 1364-5021 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::37c506907050b5cb528f4c1f5fcd0035 https://doi.org/10.1098/rspa.2010.0495 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........37c506907050b5cb528f4c1f5fcd0035 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14712946 13645021 |
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