Dresden 2020 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 28: Poster: Thin Film Properties: Structure, Morphology and Composition

DS 28.3: Poster

Mittwoch, 18. März 2020, 15:00–18:00, P1A

Shaping silver nanoparticles using low energy ion irradiation — •Shiva Choupanian¹, Alessandro Nagel², Claudia Pacholski², and Carsten Ronning¹ — ¹Institute for Solid State Physics, Friedrich Schiller University Jena, Germany — ²Institute of Chemistry, University of Potsdam, Germany

Ion irradiation of surfaces always comes up with other effects such as sputtering or/and ion beam mixing. When nanoparticles are irradiated with ions having an ion range comparable to the size of the object, strong deviation from the behavior of surfaces occurs. In this work, the morphology changes of silver nanoparticles on top of silicon substrates irradiated with Ga⁺ ions with energies ranging from 1 to 30 keV were investigated. For higher energies, the morphology change of the nanoparticles occurs dominantly due to enhanced sputtering. However, by decreasing the energy to 8 and 5 keV, a combination of sputtering, ion beam mixing and Ostwald ripening results in the reforming of new particles on top of the surface.