Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 53: Nanostructures at Surfaces: Other Aspects

O 53.5: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1C

Neon ion beam induced pattern formation on amorphous carbon surfaces — •Omar Bobes, Hans Hofsäss, and Kun Zhang — II. Physikalisches Institut, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

We investigate the ripple pattern formation on amorphous carbon surfaces at room temperature during low energy Ne ion irradiation as a function of ion incidence angle. Monte Carlo simulations of the curvature coefficients applied to the Bradley-Harper and Cater-Vishnyakov models, including the recent extensions by Harrison-Bradley and Hofsäss and taking into account the incorporation of the ions into the film predict that pattern formation on amorphous carbon should be possible for low energy Ne ions from 250 eV up to 5 keV. Moreover, simulations are able to explain the absence of pattern formation in certain cases. Our experimental results are compared with prediction using current linear theoretical models and applying the crater function formalism as well as Monte Carlo simulations to calculate curvature coefficients using SDTrimSP program.

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