Fluctuating single sp2 carbon clusters at single hotspots of silver nanoparticle dimers investigated by surface-enhanced resonance Raman scattering
Source abstract
Abstract
We evaluate spectral changes in surface enhanced resonance Raman scattering (SERRS) of near-single dye molecules in hotspots of single Ag nanoparticle (NP) dimers. During the laser excitation, surface enhance florescence (SEF) of dye disappeared and the number of SERRS lines decreased until finally ca. two lines remained around 1600 and 1350 cm−1, those are evidence of G and D lines of single sp2 carbon clusters. Analysis of the G and D line intensity ratios reveals the temporal fluctuation in the crystallite size of the clusters within several angstroms; whereas, broadening and splitting in the lines enable us for identifying directly the dynamics of various defects in the clusters. This analysis reveals that the detailed fluctuations of single sp2 carbon clusters, which would be impossible to gain with other microscopic methods.
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Research context
OpenAlex topics: Ion-surface interactions and analysis · Gold and Silver Nanoparticles Synthesis and Applications · Nonlinear Optical Materials Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) 1 Nano-Bioanalysis Research Group, , Takamatsu, Kagawa 761-0395, Japan
Research Fellow of the Japan Society for the Promotion of Science 2 , Chiyoda, Tokyo 102-8472, Japan
Kagawa University 3 Department of Chemistry, School of Science and Technology, , Takamatsu, Kagawa 761-0396, Japan
the University of Tokyo 4 Photon Science Center, , Tokyo 113-8656, Japan
Funding
Ministry of Education, Culture, Sports, Science, and Technology · Japan Science and Technology Agency
References (64)
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