Please use this identifier to cite or link to this item: https://doi.org/10.1166/jnn.2004.126
Title: Highly ordered carbon nanotubes based on porous aluminum oxide
Authors: Pan, H. 
Gao, H. 
Lim, S.H.
Feng, Y.P. 
Lin, J. 
Keywords: Carbon Nanotubes
Catalyst Nanopores
Porous Aluminum Oxide
Raman Spectroscopy
Issue Date: Nov-2004
Source: Pan, H., Gao, H., Lim, S.H., Feng, Y.P., Lin, J. (2004-11). Highly ordered carbon nanotubes based on porous aluminum oxide. Journal of Nanoscience and Nanotechnology 4 (8) : 1014-1018. ScholarBank@NUS Repository. https://doi.org/10.1166/jnn.2004.126
Abstract: Highly ordered carbon nanotubes (CNTs) are widely pursued due to their unique properties. Anodic aluminum oxide (AAO) exhibits great possibility for this purpose. Here, CNTs based on AAO templates were produced using acetylene or ethylene as the hydrocarbon sources with or without the presence of Co catalysts. CNTs grown on the Co-embedded AAO samples were normally confined within the nanopores of the AAO template. It was found that C 2H 4 normally requires 100°C higher pyrolysis temperature than C 2H 2 under otherwise identical conditions. The pyrolysis temperature is greatly reduced with the presence of Co catalysts. CNTs can grow out of the nanopores if Co particles are present at the bottom of the nanopores, and if the nanopores are short in length or large in diameter. The graphitization of AAO-template grown CNTs was studied by Raman spectroscopy. CNTs produced from ethylene are generally better in graphitization than those from acetylene, and CNTs grown with the presence of Co catalysts deposited at the bottom of nanopores are better than those without Co catalysts or with Co catalysts coated on the entire inner wall of nanopores. The growth temperature is found not to play a critical role in graphitization.
Source Title: Journal of Nanoscience and Nanotechnology
URI: http://scholarbank.nus.edu.sg/handle/10635/96805
ISSN: 15334880
DOI: 10.1166/jnn.2004.126
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