Anisotropies in Carbon Nanotube Synthesis by the Hydrogen Arc Plasma Jet Method
- 1 July 2005
- journal article
- research article
- Published by Taylor & Francis Ltd in Fullerenes, Nanotubes and Carbon Nanostructures
- Vol. 13 (4), 299-311
- https://doi.org/10.1080/15363830500237143
Abstract
Single‐wall carbon nanotubes were prepared under hydrogen gas atmosphere with a DC arc discharge maintained between the tip of a sharpened graphite cathode and an anode formed by a catalytic mixture of graphite, FeS, Ni, Fe and Co compressed powders. The cathode is placed with an inclination with respect to the anode, so that the plasma jet of the discharge is deviated towards the empty space of the growth chamber. Samples were classified and analyzed according to their type and growth positions relative to the direction of the plasma jet flow. Characterization of the samples was performed with mass spectrometry, Raman spectroscopy and transmission electron microscopy. A subtle variation is found in the properties of the nanotubes obtained in different locations due to the directionality of the plasma jet flow. Observed differences in sample properties may be qualitatively understood in terms of accepted mechanisms of SWNT growth.Keywords
This publication has 14 references indexed in Scilit:
- Characterizing carbon nanotube samples with resonance Raman scatteringNew Journal of Physics, 2003
- Chirality-dependent G-band Raman intensity of carbon nanotubesPhysical Review B, 2001
- Mass production of single-wall carbon nanotubes by the arc plasma jet methodChemical Physics Letters, 2000
- Hydrogen Storage in Single-Walled Carbon Nanotubes at Room TemperatureScience, 1999
- Optical properties of single-wall carbon nanotubesSynthetic Metals, 1999
- Semi-continuous synthesis of single-walled carbon nanotubes by a hydrogen arc discharge methodCarbon, 1999
- Large-scale production of single-walled carbon nanotubes by the electric-arc techniqueNature, 1997
- Crystalline Ropes of Metallic Carbon NanotubesScience, 1996
- The production and structure of pyrolytic carbon nanotubes (PCNTs)Journal of Physics and Chemistry of Solids, 1993
- Single-shell carbon nanotubes of 1-nm diameterNature, 1993