Quenching and enhancement of fluorescence of fullerene molecules on gold particle

The fluorescence spectra of fullerene were first observed to change greatly in the system of C60/C70-pyridine-gold hydrosol, due to the adsorption of the fullerene molecules on the gold nanoparticles. The energy transfers between C60 molecules and gold nanoparticles, leading to the quenching and enhancement of fluorescence bands centered at 450 and 700 nm, respectively. The fluorescence bands in the range from 550 to 800 nm of C70 are enhanced, arising from the increased local field intensity through the excitation of surface plasmon resonance of gold nanoparticles.