Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 68: Nanostructured surfaces and thin films – Poster

O 68.4: Poster

Mittwoch, 11. März 2026, 18:00–20:00, P2

Anomalous morphologies in ion-beam induced surface nanopatterning — •Denise J. Erb and Stefan Facsko — Ion Beam Center, Helmholtz-Zentrum Dresden-Rossendorf, Germany

Irradiating solid surfaces with broad beams of low-energy ions often results in nanaoscale patterning, emerging from a combination of erosive, ballistic and diffusive processes between ions and surface atoms. Typical pattern morphologies comprise ripples, dots, or pits and mounds. The patterning outcome was typically explained as being dominated by either adjustable properties of the ion beam such as incident angle or ion energy, or by inherent properties of the solid material such as elemental composition or crystal symmetry. However, under appropriate experimental conditions, unexpected pattern morphologies can be formed and their understanding requires considering a more complex interplay between ion beam and solid surface. We present such anomalous surface patternings as well as the current state of understanding and modeling these morphologies.

[1] D.J. Erb et al., Intermediate morphology in the patterning of the crystalline Ge(001) surface induced by ion irradiation, PRB 109 (2024) 045439

[2] D.J. Erb and S. Facsko, Tuning the Morphology of Self-Assembled Nanopatterns on MgO(001) Surfaces by Sequential Broad-Beam Ion Irradiation, Phys. Status Solidi RRL (2025) 2500117

Keywords: self-organization; low energy ion beams; nanopatterning