Evolution of multipeak spectral features in SERS reveals atomic-scale structural fluctuations in plasmonic nanocavities
Year: 2025
Type: article
Abstract: In this study, we investigate the intensity and spectral fluctuations in surface-enhanced Raman scattering (SERS) signals from individual plasmonic nanocavities.Extremely long-duration blinking components lasting up to minutes are observed in the SERS intensity fluctuation at room temperature, which can be characterized by successive and random appearance and eventual disappearance of multiple vibrational modes at different frequencies.Theoretical simulations show that multiple hotspots acting on different molecular sites are required to explain these multipeak features, suggesting that the source of long-duration blinking events is multiple atomic-scale protrusions interacting simultaneously with different sites of individual molecules or each with a different molecule.
Source: Chinese Optics Letters
Authors: Wenjin Zhou, Lei Xi, Min Yang, Guofeng Zhang, Chengbing Qin, Jianyong Hu, Yao Zhang, Ruiyun Chen, Liantuan Xiao, Suotang Jia
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4409372258