Cluster size dependence of the impact process on a carbon substrate

Takaaki Aoki, Toshio Seki, Jiro Matsuo, Zinetulla Insepov, Isao Yamada

Research output: Contribution to journalConference articlepeer-review

43 Citations (Scopus)

Abstract

Molecular dynamics simulations of various sizes of carbon molecule as clusters impacting a carbon substrate are performed in order to examine the size-dependence of the cluster ion on the impact process. Highly Oriented Pyrolitic Graphite (HOPG) was irradiated with C1, C4, C8, C19 and C60 clusters carrying the same energy-per-atom of 2 keV/ atom. When the cluster size is less than eight, interspersed damage is formed by the cascade-collision mechanism, whereas C19 and C60 impacts show homogeneously damaged regions in the surface of the substrate. In the case of large cluster ion impacts, all the incident energy of a cluster is deposited with high density in narrow region on the surface. These results show good agreement with experimental STM observations of single traces induced by the impact of C60 and small carbon molecules.

Original languageEnglish
Pages (from-to)264-269
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume153
Issue number1-4
DOIs
Publication statusPublished - Jun 1999
Externally publishedYes
EventProceedings of the 1998 4th International Conference on Computer Simulation of Radiation Effects in Solids (COSIRES) - Okayama, Jpn
Duration: Sep 15 1998Sep 19 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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