Five Orders-of-Magnitude Enhancement of Two-Photon Absorption for Dyes on Silver Nanoparticle Fractal Clusters

Wenseleers, Wim; Stellacci, Francesco; Meyer‐Friedrichsen, Timo; Mangel, Timo; Bauer, Carl J.; Pond, Stephanie J. K.; Marder, Seth R.; Perry, Joseph W.

doi:10.1021/jp014675f

Cited by 203 publications

(182 citation statements)

References 41 publications

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“…15 It is also important to remark that luminescence enhancement occurs even for the emissions centered at Ϸ585 and Ϸ623 nm. This is understood considering the influence of aggregates that usually originate hot spots of the electromagnetic field 19 that may originate the main contribution for intensification of the orange and red spectrum. 13,14 This effect was also reported for lead-germanate glasses.…”

Section: Resultsmentioning

confidence: 99%

Luminescence of Tb3+ doped TeO2–ZnO–Na2O–PbO glasses containing silver nanoparticles

Kassab

Almeida²,

Silva³

et al. 2008

Journal of Applied Physics

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Luminescence properties of Tb 3+ doped TeO 2 -ZnO-Na 2 O -PbO glasses containing silver nanoparticles ͑NPs͒ were investigated. The absorption band due to the surface plasmon resonance in the NPs was observed. Its amplitude increases with the heat treatment of the samples that controls the nucleation of the NPs. Tb 3+ emission bands centered at Ϸ485, Ϸ550, Ϸ585, and Ϸ623 nm were detected for excitation at 377 nm. The whole spectrum is intensified by the appropriate annealing time of the samples. Enhancement by Ϸ200% of the Tb 3+ luminescence at 550 nm was observed for samples annealed at 270°C during 62 h. This enhancement effect is due to the local field amplitude that increases with the amount of silver NPs and their aggregates.

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Section: Resultsmentioning

confidence: 99%

Luminescence of Tb3+ doped TeO2–ZnO–Na2O–PbO glasses containing silver nanoparticles

Kassab

Almeida²,

Silva³

et al. 2008

Journal of Applied Physics

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“…The slides were washed extensively with water and air-dried. Silver island film (SIF) deposition was accomplished as described previously [13][14][15]. Briefly, ten drops of fresh 5% NaOH solution were added to a stirring silver nitrate solution (0.25 g in 35 mL of water).…”

Section: Silver Films Preparationmentioning

confidence: 99%

“…The effects of silver islands on fluorescence were studied experimentally [8][9][10] and theoretically [11,12] in the 1980's. More recent studies include two-photon excitation near metallic particles [13][14][15], emission near roughened electrods [16], light deposited silver [17], deposited colloids [18] and silver fractals [19,20]. The increased brightness of the dyes near silver islands enables the measurements of the DNA hybridization kinetics [21].…”

Section: Introductionmentioning

confidence: 99%

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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“…Phosphonate ylid 36 was synthesized as reported previously (27,28). The same HWE procedures as described for preparation of 2 and 5 were carried out except that tetraethyl 1,4-xylylenediphosphonate was replaced by 36, consequently 1 and 4 were synthesized in good yields.…”

Section: Resultsmentioning

confidence: 99%

“…After evaporation of the solvent, the crude product was purified by chromatography on a silica gel column eluted with EtOAc/MeOH (10/1, v/v) to give the title product (60 mg) in a yield of 55%. (27,28).…”

Section: To a Solution Of E 1-(4-((2-(2-(2-(2-(bis-(4-methoxy-phenylmentioning

confidence: 99%

Design and Synthesis of Efficient Fluorescent Dyes for Incorporation into DNA Backbone and Biomolecule Detection

Wang

2007

Bioconjugate Chem.

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We report here the design and synthesis of a series of π-conjugated fluorescent dyes with D-A-D (D: donor; A: Acceptor), D-π-D, A-π-A, and D-π-A for applications as the signaling motif in biologicalsynthetic hybrid foldamers for DNA detection. Horner-Wadsworth-Emmons (HWE) reaction and Knoevenagel condensation were demonstrated as the optimum ways for construction of long π-conjugated systems. Such rod-like chromophores have distinct advantages, as their fluorescence properties are not quenched by the presence of DNA. To be incorporated into the backbone of DNA, the chromophores need to be reasonably soluble in organic solvent for solid-phase synthesis, and therefore a strategy of using flexible tetra(ethylene glycol) (TEG) linkers at either end of these rodlike dyes were developed. The presence of TEG facilitates the protection of the chain-growing hydroxyl group with DMTrCl (dimethoxy trityl chloride) as well as the activation of the coupling step with phosphoramidite chemistry on an automated DNA synthesizer. To form fluorescence resonance energy transfer (FRET) pairs, six synthetic chromophores with blue to red fluorescence have been developed and those with orthogonal fluorescent emission were chosen for incorporation into DNA-chromophore hybrid foldamers.

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Five Orders-of-Magnitude Enhancement of Two-Photon Absorption for Dyes on Silver Nanoparticle Fractal Clusters

Cited by 203 publications

References 41 publications

Luminescence of Tb3+ doped TeO2–ZnO–Na2O–PbO glasses containing silver nanoparticles

Luminescence of Tb3+ doped TeO2–ZnO–Na2O–PbO glasses containing silver nanoparticles

Fluorescence Enhancements on Silver Colloid Coated Surfaces

Design and Synthesis of Efficient Fluorescent Dyes for Incorporation into DNA Backbone and Biomolecule Detection

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