Dresden 2011 – scientific programme

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DS: Fachverband Dünne Schichten

DS 49: Ion Interactions with Nano Scale Materials IV (Focused Session -- Organisers: Diesing, Facsko)

DS 49.2: Talk

Thursday, March 17, 2011, 18:15–18:30, GER 37

Nanostructures induced by slow highly charged ions on KBr(001) surfaces — •Richard Wilhelm, René Heller, and Stefan Facsko — Helmholtz-Zentrum Dresden - Rossendorf -- Institut für Ionenstrahlphysik und Materialforschung -- Bautzner Landstraße 400 - 01328 Dresden

Highly charged ions carry a large amount of potential energy (up to 100 keV) which is defined as the sum of all binding energies of all missing electrons. This energy can be used to modify surfaces on the nano-scale and due to very low kinetic energies (less than 100 eV) significant bulk damage can be avoided. The production of nanometer sized pit-like structures on KBr(001) surfaces by the impact of single highly charged ions was studied in detail previously. The investigation of high fluence effects of highly and lowly charged ions is important to clearly identify the mechanism of defect mediated desorption as the driving force for the creation of pit-like nanostructures on ionic crystals like KBr. Results of high fluence compared to low fluence irradiations will be shown and kinetic and potential energy effects will be discussed.