Evolution of carbon surfaces under simulated bombardment by deuterium

The bombardment of both graphite and deuterated amorphous carbon surfaces with 20 eV D atoms has been performed using molecular dynamics simulation. The primary purpose of these simulations is to determine whether the eventual state of the surface, once it has reached a steady state, is independent...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-11, Vol.194 (1), p.012059
Main Authors: Stuart, Steven J, Fallet, Marcel, Krstic, Predrag S, Reinhold, Carlos O
Format: Article
Language:English
Subjects:
ATOMS
Bombardment
CARBON
Deuteration
DEUTERIUM
GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
GRAPHITE
Molecular dynamics
PENETRATION DEPTH
Physics
SIMULATION
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Summary:The bombardment of both graphite and deuterated amorphous carbon surfaces with 20 eV D atoms has been performed using molecular dynamics simulation. The primary purpose of these simulations is to determine whether the eventual state of the surface, once it has reached a steady state, is independent of the starting structure. It is found that while independently realized amorphous carbon structures give rise to similar impact-modified surfaces, the graphitic surface evolves towards a somewhat different structure. Including or neglecting a realistic treatment of the nonbonded interactions in the graphite bombardment does not result in large differences in the impact-modified structure, although the penetration depth is considerably less when nonbonded interactions are included.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/194/1/012059