Incremental Variation in the Number of Carbon Nanotube Walls with Growth Temperature
| Autor: | Hua Jiang, Toma Susi, Prasantha R. Mudimela, Albert G. Nasibulin, Delphine Chassaing, Esko I. Kauppinen |
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| Rok vydání: | 2009 |
| Předmět: |
Nanotube
Materials science Cementite Catalyst support chemistry.chemical_element Nanotechnology Carbon nanotube Atmospheric temperature range Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound General Energy Amorphous carbon chemistry Chemical engineering law Carbon nanotube supported catalyst Physical and Theoretical Chemistry Carbon |
| Zdroj: | Mudimela, P R, Nasibulin, A, Jiang, H, Susi, T, Chassaing, D & Kauppinen, E I 2009, ' Incremental variation in the number of carbon nanotube walls with growth temperature ', Journal of Physical Chemistry C, vol. 113, no. 6, pp. 2212-2218 . https://doi.org/10.1021/jp808316p |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp808316p |
| Popis: | Investigations of carbon nanotube (CNT) synthesis were carried out in a chemical vapor deposition reactor using CO as the carbon source, Fe as the catalyst material, and SiO2 as the catalyst support. This allowed us to synthesize CNTs in a wide range of diameters from 1.4 to 12 nm and lengths from 0.5 to 350 μm. An incremental variation in the number of CNT walls, increasing from one to four, was found in the temperature range of 590−1070 °C. The increase in CNT wall number and CNT length with temperature can be explained by enhancement of carbon solubility and diffusivity. CO2 was found to be a very important additive for the activation of catalyst particles and subsequently for the successful synthesis of CNTs. The prevention of cementite particle formation and etching amorphous carbon were also attributed to CO2. |
| Databáze: | OpenAIRE |
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