Dresden 2020 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 33: Poster Session - Plasmonics and Nanooptics: Applications and other Aspects
O 33.2: Poster
Montag, 16. März 2020, 18:15–20:00, P1C
Formation of conducting polymer by plasmon-induced photopolymerization — •Marisa Hoffmann1,2, Anja Maria Steiner1, Charlene Ng1, and Andreas Fery1,2 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Germany — 2Department of Physical Chemistry of Polymeric Materials, TU Dresden, Germany
Metal nanoparticles (NPs) exhibit localized surface plasmon resonances (LSPRs). LSPRs of NPs can be utilized to induce various kinds of reactions in the vicinity of the NP surface, e.g. plasmon-induced polymerizations. By this, metal-polymer nanostructures can be created which can combine conducting polymers like polypyrrole with plasmonic gold NPs. Despite the potential of those hybrid materials, the mechanisms behind the plasmon-induced polymerizations are not fully understood. How LSPRs contribute to these reactions is still at debate and requires further investigations.
In this work, we investigate the mechanism of the formation of polypyrrole at the interface between a single plasmonic gold NP and a planar TiO2 surface upon visible light illumination. The parameters for the plasmon-induced oxidative polymerization process are evaluated by UV-Vis-NIR-spectroscopy, Scanning Electron Microscopy (SEM), conductivity measurements and Kelvin Probe Force Microscopy (KPFM). The results thereof are subsequently used to transfer the plasmon-induced photopolymerization from single particle level to NP lines, leading to a scalable bottom-up method for the fabrication of functional electronic devices.