Regensburg 2016 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 56: Nanostructures: Dots, Particles and Clusters
O 56.6: Talk
Wednesday, March 9, 2016, 11:45–12:00, H4
Formation of Ag-Au core-shell clusters in superfluid helium nanodroplets studied by atomic resolution electron tomography — Philipp Thaler1, Georg Haberfehlner2, Alexander Volk1, Gerald Kothleitner2, and •Wolfgang E. Ernst1 — 1Institute of Experimental Physics, TU Graz, Petersgasse 16, 8010 Graz, Austria — 2Institute for Electron Microscopy and Nanoanalysis, TU Graz, Steyrergasse 17, 8010 Graz, Austria
Metallic nanoparticles consisting of a few thousand atoms are of large interest for potential applications in different fields such as optics, catalysis or magnetism. Structure, shape and composition are the basic parameters responsible for properties of such nanoscale materials. We report on the formation of metallic core-shell nanostructures in superfluid helium nanodroplets (HeN) and their subsequent surface deposition under soft landing conditions. Using atomic resolution electron tomography, we can clarify the structure and composition of our particles on an atomic level. This detailed analysis shines light on the growth process of the nanoparticles and will allow deliberate tuning between single core and multi-core structures in future experiments.