Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 71: Poster: Plasmonics and Nanooptics

O 71.20: Poster

Wednesday, March 20, 2024, 18:00–20:00, Poster D

Plasmonically induced RAFT polymerization on metal nanoparticles — Pascal Riebler, •Sergio Kogikoski Junior, Matthias Hartlieb, and Ilko Bald — Institute of Chemistry, University of Potsdam, Germany

Reversible addition-fragmentation chain transfer (RAFT) polymerization is one of the most versatile methods to synthesize complex polymeric architectures. This work used plasmonic Ag and Au plasmonic nanoparticles as activation agents instead of standard chemical procedures to generate the radical that will initiate the polymerization. The reactions were done in a usual photochemical setup in solution. Different irradiation wavelengths were used to investigate the activation of the chain transfer agent and the plasmonic nanoparticles. Spectroscopic and microscopic methods extensively characterized the obtained products. SERS results showed that the chain transfer agent used to modify the nanoparticles was detached from the surface to accommodate the newly synthesized polymer. Such a process of detachment generated a surface where monomers could polymerize until the surface coverage was complete, and the charge transfer from the NP to the chain transfer agent was hindered because of the distance. Our systematic results will pave the way for using plasmonic nanoparticles as reliable sources of RAFT-synthesized polymers.

Keywords: plasmonic nanoparticles; plasmonic catalysis; RAFT Polymerization; photochemistry; SERS