Low-temperature growth of multi-walled carbon nanotubes by thermal CVD
| Autor: | Ming-Chung Wu, Jarmo Kukkola, Hsueh-Chung Liao, Andrey Shchukarev, Zoltán Kónya, Wei-Fang Su, László Nagy, Geza Toth, Ákos Kukovecz, Anne Riikka Leino, Jyri-Pekka Mikkola, Krisztian Kordas, András Sápi, Róbert Puskás, Jani Mäklin, Niina Halonen |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Xylene Oxide Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 7. Clean energy 0104 chemical sciences Electronic Optical and Magnetic Materials Catalysis law.invention chemistry.chemical_compound Chemical engineering chemistry X-ray photoelectron spectroscopy Acetylene law Cyclopentene Methanol 0210 nano-technology |
| Zdroj: | physica status solidi (b). 248:2500-2503 |
| ISSN: | 0370-1972 |
| DOI: | 10.1002/pssb.201100137 |
| Popis: | Low-temperature thermal chemical vapor deposition (thermal CVD) synthesis of multi-walled carbon nanotubes (MWCNTs) was studied using a large variety of different precursor compounds. Cyclopentene oxide, tetrahydrofuran, methanol, and xylene: methanol mixture as oxygen containing heteroatomic precursors, while xylene and acetylene as conventional hydrocarbon feedstocks were applied in the experiments. The catalytic activity of Co, Fe, Ni, and their bi-as well as tri-metallic combinations were tested for the reactions. Low-temperature CNT growth occurred at 400 degrees C when using bi-metallic Co-Fe and tri-metallic Ni-Co-Fe catalyst (on alumina) and methanol or acetylene as precursors. In the case of monometallic catalyst nanoparticles, only Co (both on alumina and on silica) was found to be active in the low temperature growth (below 500 degrees C) from oxygenates such as cyclopentene oxide and methanol. The structure and composition of the achieved MWCNTs products were studied by scanning and transmission electron microscopy (SEM and TEM) as well as by Raman and X-ray photoelectron spectroscopy (XPS) and by X-ray diffraction (XRD). The successful MWCNT growth below 500 degrees C is promising from the point of view of integrating MWCNT materials into existing IC fabrication technologies. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Databáze: | OpenAIRE |
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