Carbon nanotube synthesis in supercritical toluene

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Multiwall carbon nanotubes (MWNTs) were synthesized in supercritical toluene at 600degreesC and similar to12.4 MPa using ferrocene, Fe, or FePt nanocrystals as growth catalysts. Toluene serves as both the carbon source for nanotube formation and the solvent. In contrast to vapor-phase synthetic routes, the supercritical solvent provides high precursor concentration and a homogeneous reaction environment with dispersed growth catalyst particles. Both carbon filaments and MWNTs are produced by this approach, and a growth mechanism is proposed to explain the factors that determine the nanotube versus filament morphology. The plasmon energies of the pi and pi + sigma valence electrons were measured using electron energy-loss spectroscopy (EELS) of individual carbon fibers and MWNTs as a characterization tool to complement the imaging data obtained from electron microscopy.
Publisher
AMER CHEMICAL SOC
Issue Date
2004-04
Language
English
Article Type
Article
Keywords

CHEMICAL-VAPOR-DEPOSITION; HYDROTHERMAL SYNTHESIS; GROWTH; NANOCRYSTALS; NANOWIRES; NUCLEATION; MONOXIDE; METAL; CRYSTALLINE; PYROLYSIS

Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.126, no.15, pp.4951 - 4957

ISSN
0002-7863
DOI
10.1021/ja031522s
URI
http://hdl.handle.net/10203/82788
Appears in Collection
CBE-Journal Papers(저널논문)
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