August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【241】Core@multi-shell structures in helium droplets: Au nanoparticles covered by a hexane layer and rhodamine B fluorophores

Sep 2, 2021, 2:30 PM
15m
Room C

Room C

Talk Surfaces, Interfaces and Thin Films Surfaces, Interfaces and Thin Films

Speaker

Dr Florian Lackner (Institute of Experimental Physics, Graz University of Technology)

Description

Nanoparticles comprising three different materials in a core@shell@shell configuration are synthesized in cold helium droplets by sequential doping. Rhodamine B molecules form complexes in helium droplets that give rise to a strong fluorescence upon laser excitation, enabling an in situ investigation of the synthesized structures. In the presence of a Au core, fluorescence from the rhodamine B shell is quenched due to excitation transfer from excited molecules to the Au particle. The addition of an intermediate hexane layer inhibits the contact between Au core and rhodamine B shell, which results in the recovery of the fluorescence.

Primary authors

Mr Roman Messner (Institute of Experimental Physics, Graz University of Technology) Prof. Wolfgang E. Ernst (Institute of Experimental Physics, Graz University of Technology) Dr Florian Lackner (Institute of Experimental Physics, Graz University of Technology)

Presentation materials

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