2002
DOI: 10.1103/physrevlett.89.203002
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Fluorescence Quenching of Dye Molecules near Gold Nanoparticles: Radiative and Nonradiative Effects

Abstract: The radiative and nonradiative decay rates of lissamine dye molecules, chemically attached to differently sized gold nanoparticles, are investigated by means of time-resolved fluorescence experiments. A pronounced fluorescence quenching is observed already for the smallest nanoparticles of 1 nm radius. The quenching is caused not only by an increased nonradiative rate but, equally important, by a drastic decrease in the dye's radiative rate. Assuming resonant energy transfer to be responsible for the nonradiat… Show more

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Cited by 1,209 publications
(1,140 citation statements)
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“…The lifetime component from the ligand present in the cluster is almost absent even though there are two porphyrin moieties per cluster (the presence of the ligand is proven by quenching studies and elemental analysis). It is already known that the binding of thiolated fluorophores on gold nanoparticles produces strong, structuredependent static quenching of the fluorescence intensity (64,65). In this present system also, we could see a drastic decrease of the 468 nm peak intensity (ligand absorption) in the excitation spectrum of the cluster ( Figure 1B).…”
Section: Resultssupporting
confidence: 70%
“…The lifetime component from the ligand present in the cluster is almost absent even though there are two porphyrin moieties per cluster (the presence of the ligand is proven by quenching studies and elemental analysis). It is already known that the binding of thiolated fluorophores on gold nanoparticles produces strong, structuredependent static quenching of the fluorescence intensity (64,65). In this present system also, we could see a drastic decrease of the 468 nm peak intensity (ligand absorption) in the excitation spectrum of the cluster ( Figure 1B).…”
Section: Resultssupporting
confidence: 70%
“…This is somewhat surprising because the absorption bands of gold often result in fluorescence quenching [25][26][27][28]. However, SPCE occurs over distances from the metal surface of 20-200 nm [20,21,29] which is longer than the distances for Forster resonance energy transfer quenching.…”
Section: Discussionmentioning
confidence: 99%
“…However, SAM-based fluorescent sensors development has encountered difficulties due to an efficient fluorescent quenching by the metal surfaces. 202,203 Only few reports have been published on the detection of fluorescence from selfassembled monolayers on gold. Motesharei and Myles reported in 1998 the preparation of layers of a fluorescent isophthalic acid adsorbate on gold.…”
Section: Glass and Gold Surfacesmentioning
confidence: 99%