Direct demonstration for changes in surface plasmon resonance induced by surface-enhanced Raman scattering quenching of dye molecules adsorbed on single Ag nanoparticles

Itoh, Tamitake; Hashimoto, Kazuhiro; Ikehata, Akifumi; Ozaki, Yukihiro
December 2003
Applied Physics Letters;12/29/2003, Vol. 83 Issue 26, p5557
Academic Journal
Changes in surface plasmon resonance (SPR) bands induced by surface-enhanced Raman scattering (SERS) quenching of rhodamine 6G (R6G) molecules adsorbed on single Ag nanoparticles were investigated by light scattering microspectroscopy. It was found that SPR bands show a peak shift to a higher-energy side and that their intensities increase after SERS quenching. It was also revealed that these SPR bands are accompanied by an enhanced absorption band of R6G and that it has the same anisotropy as SERS and SPR bands. Assuming that the changes in the SPR bands are caused by the desorption of R6G molecules, we compared our experimental findings with calculation results obtained based on Rayleigh scattering theory. © 2003 American Institute of Physics.


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