Physics – Atomic and Molecular Clusters
Scientific paper
2008-08-08
Phys. Rev. B 79, 165403, (2009)
Physics
Atomic and Molecular Clusters
27 pages, 13 figures
Scientific paper
10.1103/PhysRevB.79.165403
We demonstrate that the addition of a single carbon impurity leads to significant changes in the thermodynamic properties of Ni clusters consisting of more than a hundred atoms. The magnitude of the change induced is dependent upon the parameters of the Ni-C interaction. Hence, thermodynamic properties of Ni clusters can be effectively tuned by the addition of an impurity of a particular type. We also show that the presence of a carbon impurity considerably changes the mobility and diffusion of atoms in the Ni cluster at temperatures close to its melting point. The calculated diffusion coefficients of the carbon impurity in the Ni cluster can be used for a reliable estimate of the growth rate of carbon nanotubes.
Greiner Walter
Hussien Adilah
Lyalin Andrey
Solov'yov Andrey V.
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