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Effects of Catalyst on the Super-Growth of Multi-Walled Carbon Nanotubes

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We investigated the effects of catalyst (Fe)/buffer layer (Al2O3) on the vertical growth multiwalled carbon nanotubes (CNTs) synthesized by thermal chemical vapor deposition. The Fe was deposited onto Al2O3/SiO2/Si wafer by using e-beam evaporator. Ethylene was used as a feeding gas while argon was used as a carrier gas. Hydrogen was also introduced. The catalyst layers were optimized to control the length, diameter, purity, and alignment of CNTs. For the optimized conditions we produced vertically aligned CNTs of about 1 cm in length during 10 h. The effects of catalysts on nanotube characteristics were systematically analyzed using SEM, TEM, and Raman measurement.
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Keywords: MULTI-WALLED CARBON NANOTUBES; SANDWICH-LIKE CATALYST; THERMAL CHEMICAL VAPOR DEPOSITION; VERTICALLY ALIGNED SUPER-GROWTH

Document Type: Research Article

Publication date: 2010-05-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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