期刊
SURFACE SCIENCE
卷 602, 期 3, 页码 671-676出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2007.10.030
关键词
scanning tunnelling microscopy; highly oriented pyrolytic graphite; surface superstructures; ion bombardment; beam-induced effects
By combining a low dose of Ar+ ion bombardment on a highly oriented pyrolytic graphite surface and scanning tunnelling microscopy, we have been able to study different superstructures formed by the collision cascades of individual ion impacts. These superstructures may coexist; even interfere to give place to a new superstructure. Thus, we report the coexistence of a Moire pattern with a (root 3 x root 3)R30 degrees superstructure. Furthermore, the superposition of two (root 3 x root 3)R30 degrees superstructures forming a honeycomb one, leads us to suggest that the latter may be not a superstructure itself. (C) 2007 Elsevier B.V. All rights reserved.
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