[Zurück]

W. Meissl, A.S. El-Said, M. Simon, J.R. Crespo López-Urrutia, H. Tawara, Hp. Winter, M. Lang, F. Aumayr:
"Surface modifications on and electron emission from insulator surfaces induced by impact of slow highly charged ions";
Poster: Symp. on Surface Science 2006 (3S'06), St. Christoph am Arlberg; 07.03.2006; in: "Proc. 3S06", F. Aumayr, P. Varga (Hrg.); (2006), S. 83 - 84.

Highly charged ions (HCI) carry a large amount of potential energy which is released upon
impact on a surface. Since under certain circumstances this energy can give rise to surface
modifications, HCI impact can be considered as a promising tool for future nanostructuring
efforts. Several studies have been devoted to swift heavy ion-induced nanostructure formation in
fluoride ionic single crystals (see e.g. [1] and refs. therein), but so far no clear understanding of
the formation mechanism for the observed hillock-like structures could be achieved.
Nanostructuring by swift heavy ions is subject to unwanted radiation damage in deep layers
(hundreds of micrometers from the surface), whereas slow HCI interact with the top-most
surface layer only. Concerning the approach of slow HCI towards the surface, there is a debate
on how hollow atoms are formed in front of insulator surfaces [2], since the different dielectric
response as compared to a metal surface (lower image charge attraction, limited hole mobility)
makes modeling calculations rather ambiguous.

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