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Quenching dynamics promoted by silver nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
27723 44039 2008 7 PDF Available
Title
Quenching dynamics promoted by silver nanoparticles
Abstract

We have studied fluorescence quenching by electron transfer between tris(2,2′-bipyridyl)ruthenium(II) complex and methyl viologen in solutions containing silver nanoparticles. The Stern–Volmer plot and transient absorbance indicate that both dynamic and static mechanisms are involved in the quenching. In the presence of silver nanoparticles, reverse saturable absorption at silver surfaces has promoted the quenching process by populating the excited triplet state of the donor species. Furthermore, the negatively charged silver particles are effective catalysts in attracting the cationic donor–acceptor pairs into the “sphere-of-action”, which is the dominant mechanism for the static quenching.

Keywords
Nanoparticles; Electron transfer; Reverse saturable absorption; Sphere-of-action
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Quenching dynamics promoted by silver nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 254–260
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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