Journal
MATERIALS LETTERS
Volume 63, Issue 22, Pages 1955-1957Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2009.06.016
Keywords
Carbon nanotube; Amorphous; Anodic aluminum oxide
Funding
- National Basic Research Program of China (973 Program) [2007CB209702]
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An easy versatile method is reported to synthesize tunable amorphous carbon nanotubes (a-CNTs) with different pore diameter, length and orientation of graphene layers at a low temperature of 450 degrees C in the absence of metal catalysts by using porous anodic aluminum oxide (AAO) as a template and citric acid as a precursor. Since citric acid was adsorbed by hydrogen bonds with the -OH groups at the walls of the AAO templates, which can be influenced by the concentration of H+ ions in the solution, the pH leads to the change of the orientation of graphene layers and the graphitization degree. (C) 2009 Elsevier B.V. All rights reserved.
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