Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 268, Issue 19, Pages 2897-2900Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2010.04.023
Keywords
HOPG; AFM; STM; Nanostructuring; Hillocks; Friction; Feature erasure
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Highly ordered pyrolitic graphite (HOPG) was irradiated with slow highly charged Arq+ and Xeq+ ions in a kinetic energy range of 150-360 keV and has been observed by scanning probe microscopy. Nano-sized hillock-like structures are found for all charge states and kinetic energies with both the scanning tunneling microscope and the atomic force microscope. However in the latter case, the dependence of the detected structures on scan conditions points towards a surface modification which manifests itself only in frictional forces and therefore in height measurement artifacts. Furthermore the generated defects are not stable but can be erased by continuous scanning in contact mode. (C) 2010 Elsevier B.V. All rights reserved.
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