Shell-isolated nanoparticle-enhanced femtosecond stimulated Raman spectroscopy reveals ultrafast molecular dynamics of surface reactions.

ABSTRACT: In-situ tracking of the transient processes of surface/interfacial chemical reactions is of great significance for understanding the essence of catalytic mechanisms but remains highly challenging. Herein, shell-isolated nanoparticle-enhanced femtosecond stimulated Raman spectroscopy (SHINE-FSRS) with high sensitivity and temporal resolution has been developed to explore the ultrafast molecular dynamics of surface reactions. The FSRS signals have been greatly enhanced through the fabrication of plasmonic nanocavities, achieving a maximum enhancement factor of ~10⁶ through optimal matching of the plasmonic band of the nanocavity with the wavelength of the Raman pump laser, using malachite green (MG) as the probe molecule. Using SHINE-FSRS, the ultrafast structural evolution during

SUBMITTER: Sun HG 

PROVIDER: S-EPMC12722254 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature