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Proceedings Paper

Synthesis of carbon nanomaterials by atmospheric microplasma
Author(s): Q. Zou; A. Hatta
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Paper Abstract

Atmospheric microplasma was produced in a scanning electron microscope (SEM) chamber for synthesizing carbon nanomaterials. The SEM observation is convenient for both adjusting the gap length and observing the electrode surface before and after experiments. After adjusting the gap length, the electrodes were housed in a small removable gas cell equipped in the SEM chamber and CH4 discharge gas was introduced into the gas cell. It was found that the discharge was pulsated automatically due to slow discharge through a large ballast resistor and fast discharge through gas breakdown even though a DC voltage was applied. The peak pulse current density was almost 60 kA/cm2, the peak power density in the microplasma volume was approximately 555 MW/cm3, and the pulse width was 10 ns typically. Spherical and nanotube like carbon nanomaterials was found on the cathode surface after the microplasma discharging for 1-5 seconds. With the discharge time increases, the spherical substance changes into nanotube like carbon nanomaterials.

Paper Details

Date Published: 1 November 2007
PDF: 7 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64230S (1 November 2007); doi: 10.1117/12.779338
Show Author Affiliations
Q. Zou, Kochi Univ. of Technology (Japan)
A. Hatta, Kochi Univ. of Technology (Japan)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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