Molecular dynamics evidences of the full graphitization of a nanodiamond annealed at 1500 K
Language
EN
Article de revue
This item was published in
Chemical Physics Letters. 2008-03-20, vol. 454, n° 4-6, p. 299-304
English Abstract
The annealing of a small nanodiamond cluster at 1500 K is studied by molecular dynamics. The transformation of the particle in an almost fully graphitized carbon onion is observed. The remaining 17% of sp3 atoms are ...Read more >
The annealing of a small nanodiamond cluster at 1500 K is studied by molecular dynamics. The transformation of the particle in an almost fully graphitized carbon onion is observed. The remaining 17% of sp3 atoms are delocalized on the whole particle, both under the form of isolated point defects and of small diamond-like clusters separating large graphite-like domains. It is also shown, that the Berendsen thermostat, previously used to fix temperature in such simulations, transfers kinetic energy from internal to global motions of the cluster. This can lead to severe artifacts like the freezing of the graphitization process.Read less <
English Keywords
Onion-like carbon
Ultra-disperse diamond
Transformation
Nanoparticles
Temperature
Simulations