Abstract
The interaction of an Ar ion with a C60@C240@C540 carbon onion and an Ar ion beam with a C60@C240@C540@C960 carbon onion are studied by molecular dynamics. The energy threshold for the formation of a vacancy in a pentagon of the onion fullerene shell is examined in two temperature regimes (300 and 1000 K). The main types of defects formed in the onion structure at various incident ion energies are detected and described. It is shown that the pentagonal cycles with their nearest environment are the least stable regions in the carbon onion under irradiation. The results obtained provide direct confirmation of the possibility of formation of a diamond structure upon ion irradiation of carbon onions.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 79, No. 8, 2004, pp. 460–466.
Original Russian Text Copyright © 2004 by Ponomareva, Chernozatonski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \).