Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 71: Poster: Plasmonics and Nanooptics
O 71.21: Poster
Mittwoch, 20. März 2024, 18:00–20:00, Poster D
Hot-electron mediated chirality transfer in single nanoparticles — Seunghoon Lee1,2, •Chenghao Fan1, Artur Movsesyan3, Johannes Bürger1, Fedja J. Wendisch1, Leonardo de S. Menezes1, Stefan A. Maier1,4, Haoran Ren4, Tim Liedl1, Lucas V. Besteiro5, Alexander O Govorov3, and Emiliano Cortés1 — 1Faculty of Physics, LMU München, 80539 Munich, Germany — 2Department of Chemistry, Dong-A University, Busan 49315, South Korea — 3Department of Physics and Astronomy, Ohio University, Ohio 45701, United States — 4School of Physics and Astronomy, Monash University, Victoria 3800, Australia — 5CINBIO, University of Vigo, 36310 Vigo, Spain
Recently, chiral plasmonic nanostructures have drawn tremendous interest due to their unique chiroptical properties. Here, we thoroughly investigate the plasmon-assisted growth of chiral nanoparticles from achiral Au nanocubes (AuNCs) via circularly polarized light (CPL) without involvement of any chiral molecules. We identify the structural chirality of our synthesized chiral plasmonic nanostructures by using circular differential scattering (CDS) spectroscopy correlated with scanning electron microscopy imaging at both the single-particle and ensemble levels. Theoretical simulations, including hot-electron surface maps, reveal that the plasmon-induced chirality transfer is mediated by the asymmetric distribution of hot electrons on achiral AuNCs under CPL excitation. Results presented here reveal fundamental aspects of chiral light-matter interaction, influencing the future design and optimization of chiral sensors and chiral catalysis, among others.
Keywords: chirality transfer; hot electrons; metal nanoparticles; plasmonics; single-particle scattering