Nano Archive

The production of carbon nano-materials by arc discharge under water or liquid nitrogen

XING, Gang and JIA, Shen-li and SHI, Zong-qian (2007) The production of carbon nano-materials by arc discharge under water or liquid nitrogen. New Carbon Materials, 22 (4). 337 - 341.

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Official URL: http://www.sciencedirect.com/science/article/B8H10...

Abstract

The growth mechanism of carbon nano-materials by arc discharge in water or liquid nitrogen was investigated using a special arc discharge apparatus. High-resolution transmission electron microscopy was used to observe and analyze the products. Results indicated that multi-walled carbon nanotubes (MWCNTs) and carbon onions can be produced by arc discharge in water and liquid nitrogen respectively. Single-walled carbon nanohorns can be produced by arc discharge in liquid nitrogen, and cobalt encapsulated carbon nano-particles can be produced by cobalt catalyzed carbon arc discharge in water. The liquids acted as quenching walls for the nucleation and growth of carbon nano-materials, resulting in the formation of different forms of carbon nano-materials. A cross alternating magnetic field with a frequency 5 Hz can affect the nucleation of nano-materials to form MWCNTs or carbon onions because nucleation time is longer than the periodicity of the magnetic field. Based on the experimental phenomena, a primary physical model was proposed to interpret the growth of nano-materials by arc discharge in liquids.

Item Type:Article
Uncontrolled Keywords:Arc discharge; Carbon nano-material; Production
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:8682
Deposited By:SPI
Deposited On:22 Apr 2010 11:16
Last Modified:22 Apr 2010 11:16

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