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O: Fachverband Oberflächenphysik
O 46: Plasmonics and Nanooptics IV: Fabrication and Applications
O 46.1: Talk
Wednesday, March 20, 2024, 10:30–10:45, MA 042
Electron-beam-induced synthesis and characterization of random plasmonic gold nanoparticle assemblies — •Kristina Weinel1,2, Johannes Schultz2, Daniel Wolf2, Leonardo Agudo Jácome1, Axel Lubk2,3, and Bernd Büchner2,3 — 1Federal institute of materials research and testing, Berlin, Germany — 2Leibniz institute for solid state and materials research Dresden, Dresden, Germany — 3Institute of solid state and materials physics, Technische Universitaet Dresden (TUD), Dresden, Germany
Several studies have been shown that the electron beam can be used to create nanomaterials from microparticle targets in situ in a transmission electron microscope (TEM). Here, we show how this method has to be modified in order to synthesize plasmonic gold nanoparticles (NPs) on insulating silicon oxide substrate by employing a scanning electron microscope with a comparatively low acceleration voltage of 30 kV.
The synthesized NPs exhibit a random distribution around the initial microparticle target: Their average size reduces from 150 nm to 3 nm with growing distance to the initial Au microparticle target. Similarly, their average distance increases. The synthesized NP assemblies therefore show distinctly different plasmonic behaviour with growing distance to the target, which allows to study consequences of random hybridization of surface plasmons in disordered system, such as Anderson localization. To reveal the surface plasmons and their localization behaviour we apply electron energy loss spectroscopy in the TEM.
Keywords: Electron-beam-induced synthesis; plasmonic gold nanoparticles; random hybridization of surface plasmons; disordered system; Anderson localization