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)
