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O: Fachverband Oberflächenphysik

O 58: Focus Session: Novel Approaches to Surface Plasmon Generated Charges and Heat for Photocatalysis I (joint session O/CPP)

O 58.1: Topical Talk

Mittwoch, 20. März 2024, 15:00–15:30, MA 141

Plasmonic photothermal chemistry on single nanoparticles — •Andrea Baldi — Vrije Universiteit Amsterdam, The Netherlands

Metal nanoparticles strongly absorb light thanks to light-driven oscillations of their free electrons called plasmon resonances. The decay of these resonances can be used to drive chemical reactions via heating of the surrounding environment. In this talk, I will show how we quantify photothermal heating on single nanoparticles using a novel Raman-based thermometry [1] and how we use localized temperature gradients to drive the synthesis of hierarchical core-shell nanostructures [2].

[1] P. Li, S. H. C. Askes, E. del Pino Rosendo, F. Ariese, C. Ramanan, E. von Hauff, and A. Baldi, Nanoscale Thermometry of Plasmonic Structures via Raman Shifts in Copper Phthalocyanine, J. Phys. Chem. C 2023, 127, 9690-9698

[2] R. Kamarudheen, G. Kumari, and A. Baldi, Plasmon-driven synthesis of individual metal@semiconductor core@shell nanoparticles, Nature Communications 2020, 11:3957

Keywords: Plasmonic chemistry; Photothermal effects; Metal nanoparticles; Raman thermometry