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Title: Plasma synthesis of well-aligned carbon nanocones
Authors: Tan, C.K. 
Loh, K.P. 
Thong, J.T.L. 
Sow, C.H. 
Zhang, H. 
Keywords: Atomic force microscope
Carbon nanotubes
Chemical vapor deposition
Issue Date: Mar-2005
Citation: Tan, C.K., Loh, K.P., Thong, J.T.L., Sow, C.H., Zhang, H. (2005-03). Plasma synthesis of well-aligned carbon nanocones. Diamond and Related Materials 14 (3-7) : 902-906. ScholarBank@NUS Repository.
Abstract: Deposition of well-aligned carbon nanocone array has been achieved on catalytically patterned Si (100) substrates by direct current (DC) plasma-enhanced chemical vapor deposition method using acetylene and ammonia mixtures. It was found that the high concentration of acetylene utilized in the growth transformed the cylinder shape of carbon nanotubes into cones. Examination of these conical nanostructures using TEM revealed that they consist of a bundle of crystalline bamboo-like carbon nanotubes that exhibited a graded increase in heights from the periphery to the center. Focused He-Ne laser was used to cut the cone and expose the internal nanotube bundles. A mechanism based on restricted diffusion of precursors to the inner nanotube has been proposed to explain the growth of the nanocone. We found that the nanocone array is mechanically stiff in solution, and the hexagonal nanocene array can be imaged by an atomic force microscope. © 2004 Published by Elsevier B.V.
Source Title: Diamond and Related Materials
ISSN: 09259635
DOI: 10.1016/j.diamond.2004.12.026
Appears in Collections:Staff Publications

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