Evolution of multipeak spectral features in SERS reveals atomic-scale structural fluctuations in plasmonic nanocavities
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.
Authors
- Ruiyun Chen (ORCID: https://orcid.org/0000-0002-0037-856X)
- Jianyong Hu (ORCID: https://orcid.org/0009-0004-2245-3307)
- Lei Xi (ORCID: https://orcid.org/0000-0002-5564-9953)
- Min Yang (ORCID: https://orcid.org/0000-0001-6976-8526)
- Suotang Jia
- Chengbing Qin (ORCID: https://orcid.org/0000-0002-6822-5113)
- Liantuan Xiao (ORCID: https://orcid.org/0000-0003-2690-6460)
- Yao Zhang (ORCID: https://orcid.org/0000-0002-6524-0289)
- Guofeng Zhang (ORCID: https://orcid.org/0000-0002-9030-0431)
- Wenjin Zhou (ORCID: https://orcid.org/0009-0009-8416-1621)
Institutions
- University of Science and Technology of China (CN)
- Shanxi University (CN)
- State Key Laboratory of Quantum Optics and Quantum Optics Devices
Publication Details
- Journal
- Chinese Optics Letters
- Published
- 2025-01-01
- DOI
- https://doi.org/10.3788/col202523.043602
- Citations
- 1
- Primary Topic
- Gold and Silver Nanoparticles Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.43
Funders
- National Natural Science Foundation of China
- Higher Education Discipline Innovation Project
- ShanXi Science and Technology Department
- National Key Research and Development Program of China
- Program for Changjiang Scholars and Innovative Research Team in University