Nano Archive

Modeling catalyst nucleation for carbon nanotube growth by chemical-vapor and plasma-enhanced chemical-vapor deposition methods

Abdi, Yaser and Mohajerzadeh, Shamsoddin and Ezatollah, Arzi (2010) Modeling catalyst nucleation for carbon nanotube growth by chemical-vapor and plasma-enhanced chemical-vapor deposition methods. Journal of Nanoparticle Research, 12 (2). pp. 521-528.

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Abstract

The nucleation of the nickel nanoparticles on substrates, a critical process in the growth of carbon nanotubes, has been modeled analytically using thermodynamic and statistical theories. It was hypothesized that during the initial stages of the annealing process smaller nanoparticles with the size of about 5 nm form and, subsequently, randomly hop to make larger nanoparticles. The minimum and maximum diameter of the nickel nanoparticles can be obtained from the derived expressions. In addition, the size-dependent probability of forming the nanoparticles was examined at various temperatures and plasma power densities in chemical-vapor deposition and plasma-enhanced chemical-vapor deposition methods, respectively. The theoretical results presented agreed very well with experimental data.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:8197
Deposited By:JNCASR
Deposited On:10 Feb 2010 10:02
Last Modified:10 Feb 2010 10:02

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