A molecular spectroscopic description of optical spectra of J-aggregated dyes on gold nanoparticles.
The extinction spectra of J-aggregated dyes on gold nanoparticles, which exhibit interferences between the plasmonic and dye resonances, are simulated by a quantum mechanical model that considers the dye transition to interact through transition-dipole coupling with a continuum of nanoparticle states. This alternative to the classical core-shell dielectric model provides the wavefunctions of the coupled molecule-nanoparticle system and qualitatively explains the enhancement of resonance Raman, fluorescence, and other light-driven processes of molecules adsorbed to nanoparticles.
Kelley
Anne Myers
AM
School of Natural Sciences, University of California, P.O. Box 2039, Merced, California 95344, USA. amkelley@ucmerced.edu
D004396:Coloring Agents / Q000737:chemistry*; D003198:Computer Simulation; D006046:Gold / Q000737:chemistry*; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013050:Spectrometry, Fluorescence / Q000379:methods*
D004396:Coloring Agents; D006046:Gold