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Synthesis and Structural Characterization of Catalyst-Free Carbon Micro-Cones

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Kumar, S, Hamilton, JWJ, McLaughlin, JAD and Tanner, D (2009) Synthesis and Structural Characterization of Catalyst-Free Carbon Micro-Cones. Journal of Nanoscience and Nanotechnology, 9 (7). p. 4492. [Journal article]

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URL: http://dx.doi.org/10.1166/jnn.2009.M82

DOI: doi: 10.1166/jnn.2009.M82

Abstract

We report the growth of vertically oriented carbon micro-cones without using any foreign catalyst on silicon (100) substrate by microwave plasma assisted chemical vapour deposition method. The average height and bottom diameter of the carbon micro-cones are ∼20 μm and ∼1.4 μm, respectively. The diameters of the carbon micro-cones decrease gradually from bottom to tip, terminating in a nanotube structure. Mechanical damage of micro-cones resulted in the breaking and partial removal of the carbon micro-cones to show the structures possessed a nanotube core. Outside the micro-cone, the nanotubes showed a flattened ribbon structure. Electron microscopy and micro-Raman spectroscopy shows the nanotubes are multi walled and highly graphitic, with low structural disorder. The advanced vacuum electron emission devices could be fabricated with the carbon micro-cones grown directly on silicon substrate without using any catalyst.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:7429
Deposited By:Dr Jeremy Hamilton
Deposited On:20 Jan 2010 09:22
Last Modified:15 Jun 2011 10:51

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