Few-cycle laser driven reaction nanoscopy on aerosolized silica nanoparticles

Author:

Rupp Philipp,Burger Christian,Kling Nora G.,Kübel Matthias,Mitra Sambit,Rosenberger Philipp,Weatherby ThomasORCID,Saito NariyukiORCID,Itatani JiroORCID,Alnaser Ali S.,Raschke Markus B.,Rühl EckartORCID,Schlander Annika,Gallei Markus,Seiffert Lennart,Fennel ThomasORCID,Bergues Boris,Kling Matthias F.ORCID

Abstract

Abstract Nanoparticles offer unique properties as photocatalysts with large surface areas. Under irradiation with light, the associated near-fields can induce, enhance, and control molecular adsorbate reactions on the nanoscale. So far, however, there is no simple method available to spatially resolve the near-field induced reaction yield on the surface of nanoparticles. Here we close this gap by introducing reaction nanoscopy based on three-dimensional momentum-resolved photoionization. The technique is demonstrated for the spatially selective proton generation in few-cycle laser-induced dissociative ionization of ethanol and water on SiO2 nanoparticles, resolving a pronounced variation across the particle surface. The results are modeled and reproduced qualitatively by electrostatic and quasi-classical mean-field Mie Monte-Carlo (M3C) calculations. Reaction nanoscopy is suited for a wide range of isolated nanosystems and can provide spatially resolved ultrafast reaction dynamics on nanoparticles, clusters, and droplets.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry

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