Direct Observation of Single-Walled Carbon Nanotube Growth at the Atomistic Scale
The growth dynamics of a single-walled carbon nanotube (SWNT) is observed in real-time using an in situ ultrahigh vacuum transmission electron microscope at 650 °C. SWNTs preferentially grow on smaller sized catalyst particles (diameter ≤ 6 nm) with three distinct growth regimes (incubation, growth,...
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| Veröffentlicht in: | Nano letters 2006-03, Vol.6 (3), p.449-452 |
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| container_issue | 3 |
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| container_title | Nano letters |
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| creator | Lin, Ming Ying Tan, Joyce Pei Boothroyd, Chris Loh, Kian Ping Tok, Eng Soon Foo, Yong-Lim |
| description | The growth dynamics of a single-walled carbon nanotube (SWNT) is observed in real-time using an in situ ultrahigh vacuum transmission electron microscope at 650 °C. SWNTs preferentially grow on smaller sized catalyst particles (diameter ≤ 6 nm) with three distinct growth regimes (incubation, growth, and passivation). All of the observed SWNTs grow via a base-growth mechanism with C diffusion on active Ni catalyst sites. Under the same experimental conditions, formation of carbon nanocages was observed on larger Ni catalyst particles. The evolution of SWNTs or nanocages is dependent on catalyst size, and this can be rationalized from both energetics and kinetics considerations. |
| doi_str_mv | 10.1021/nl052356k |
| format | Article |
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| source | ACS Publications |
| subjects | Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of deposition of films and coatings film growth and epitaxy Methods of nanofabrication Nanoscale materials and structures: fabrication and characterization Nanotubes Physics Theory and models of film growth |
| title | Direct Observation of Single-Walled Carbon Nanotube Growth at the Atomistic Scale |
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