Growth behavior of carbon nanotubes on multilayered metal catalyst film in chemical vapor deposition
| Autor: | D. H. Lowndes, Maria Varela, David B. Geohegan, Jane Y. Howe, A. A. Puretkzy, Gyula Eres, H. Cui |
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| Rok vydání: | 2003 |
| Předmět: |
Silicon
Chemistry Scanning electron microscope General Physics and Astronomy chemistry.chemical_element Nanotechnology Chemical vapor deposition Carbon nanotube Atmospheric temperature range law.invention symbols.namesake Chemical engineering Transmission electron microscopy law symbols Physical and Theoretical Chemistry Raman spectroscopy Carbon |
| Zdroj: | Chemical Physics Letters. 374:222-228 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/s0009-2614(03)00701-2 |
| Popis: | The temperature and time dependences of carbon nanotube (CNT) growth by chemical vapor deposition are studied using a multilayered Al/Fe/Mo catalyst on silicon substrates. Within the 600–1100 °C temperature range of these studies, narrower temperature ranges were determined for the growth of distinct types of aligned multi-walled CNTs and single-walled CNTs by using high-resolution transmission electron microscopy and Raman spectroscopy. At 900 °C, in contrast to earlier work, double-walled CNTs are found more abundant than single-walled CNTs. Defects also are found to accumulate faster than the ordered graphitic structure if the growth of CNTs is extended to long durations. |
| Databáze: | OpenAIRE |
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