Enhanced dye fluorescence over silver island films: analysis of the distance dependence

Kümmerlen, Jörg; Leitner, A.; Brunner, Harald; Aussenegg, F. R.; Wokaun, Alexander

doi:10.1080/00268979300102851

Cited by 301 publications

(293 citation statements)

References 26 publications

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“…The increase of the brightness observed on silvered part of the slides is a result of two possible processes: 1) an increase of a local field near the metal particles and 2) an increase of radiative decay rate Γ [25,26,29,30]. The local field enhancement provides a higher excitation rate but does not alter the lifetime of fluorophore.…”

Section: Resultsmentioning

confidence: 96%

Fluorescence Enhancements on Silver Colloid Coated Surfaces

Łukomska

Malicka

Gryczyński

et al. 2004

Journal of Fluorescence

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We observed a strong, more than 16-fold, enhancement of Texas Red-labeled BSA fluorescence emission when deposited on silver colloid coated surfaces (SCCS). The same labeled protein deposited on silver island films (SIFs) showed an approximate 8-fold fluorescence enhancement. The lifetimes of Texas Red-BSA fluorescence are significantly shorter on silvered surfaces than on uncoated quartz substrate indicating a strong change in radiative decay rate of the dyes. We also observed a 36-fold increased brightness of overlabeled fluorescein-HSA deposited on silver colloid coated surface. Stronger enhancement observed for overlabeled Fl-HSA protein indicates that presence of silver particles partially decreased self-quenching. Our results indicate that surfaces coated with silver colloids are valuable substrates for metal-enhanced fluorescence.

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Section: Resultsmentioning

confidence: 96%

Fluorescence Enhancements on Silver Colloid Coated Surfaces

Łukomska

Malicka

Gryczyński

et al. 2004

Journal of Fluorescence

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“…When the SiN x is heated, the plasmonic modes act as antennae to enhance the spontaneous thermal radiation from the nearby SiN x . The enhancement of the spontaneous emission radiative rate and of the quantum efficiency arising from dipole emitters' proximity to a dipole optical antenna is well known [34][35][36] , and is attributed to increasing the probability of radiative emission by modification of the photonic mode density 37 . The rate enhancement is correlated to the strong polarizability of the graphene at its plasmonic resonance that enhances the outcoupling of thermal radiation from the SiN x .…”

Section: Discussionmentioning

confidence: 99%

Electronic modulation of infrared radiation in graphene plasmonic resonators

et al. 2015

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All matter at finite temperatures emits electromagnetic radiation due to the thermally induced motion of particles and quasiparticles. Dynamic control of this radiation could enable the design of novel infrared sources; however, the spectral characteristics of the radiated power are dictated by the electromagnetic energy density and emissivity, which are ordinarily fixed properties of the material and temperature. Here we experimentally demonstrate tunable electronic control of blackbody emission from graphene plasmonic resonators on a silicon nitride substrate. It is shown that the graphene resonators produce antenna-coupled blackbody radiation, which manifests as narrow spectral emission peaks in the mid-infrared. By continuously varying the nanoresonator carrier density, the frequency and intensity of these spectral features can be modulated via an electrostatic gate. This work opens the door for future devices that may control blackbody radiation at timescales beyond the limits of conventional thermo-optic modulation.

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“…19 The enhancement of fluorescence intensity generally depends on the surface features and the optimal distance of fluorophores from the surface. 9,[16][17][18] Shifting a fluorophore only a few nanometers away from the metallic surface may lead to an enormous emission change by orders of magnitude. In addition, the strong energy transfer from the excited molecules to the metal particles or an increase in the radiative decay rate of the fluorophore can dramatically shorten the lifetime of the excited state.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fluorescence of Cy5-Labeled Oligonucleotides Near Silver Island Films: A Distance Effect Study Using Single Molecule Spectroscopy

Lakowicz

2006

J. Phys. Chem. B

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We investigated fluorescence enhancements and lifetime reductions of Cy5 probe molecules at various distances from the deposited silver island film surface using single molecule spectroscopic methods. The proximity of fluorophore molecules to the surface was controlled by alternating layers of biotinylated bovine serum albumin (BSA-biotin) and avidin, followed by binding of Cy5-labeled oligonucleotides to the top of a BSA-biotin layer structure. We observed dramatically varied brightness of fluorophores with distances from metal structures as well with reduced blinking in the presence of silver island films. In addition, distributions of fluorescence lifetimes and apparent emission intensities from individual molecules indicate an inhomogeneous nature of local matrix surface near metallic nanostructures. These studies illustrate the exclusive information that is otherwise hidden in ensemble measurements.

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Enhanced dye fluorescence over silver island films: analysis of the distance dependence

Cited by 301 publications

References 26 publications

Fluorescence Enhancements on Silver Colloid Coated Surfaces

Fluorescence Enhancements on Silver Colloid Coated Surfaces

Electronic modulation of infrared radiation in graphene plasmonic resonators

Enhanced Fluorescence of Cy5-Labeled Oligonucleotides Near Silver Island Films: A Distance Effect Study Using Single Molecule Spectroscopy

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