Abstract

The luminescence properties of osthole in the presence of spherical silver nanoparticles (AgNPs) with sizes ranging from 5 to 25 nm were investigated by means of fluorescence and absorption spectroscopic experiments, as well as time-resolved fluorescence experiments. Quenching of the fluorescence of osthole has been found to increase with a reduction in the sizes of the silver nanoparticles. Using the Gersten–Nitzan model, the theoretical and experimental results were compared, and the results are in good unity. Stern–Volmer quenching constants have also been calculated. Both dynamic quenching and static quenching mechanisms exist between osthole molecules and silver nanoparticles.

© 2013 Optical Society of America

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