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Preparation of plasmonic platforms of silver wires on gold mirrors and their application to surface enhanced fluorescence.

Shtoyko T, Raut S, Rich RM, Sronce RJ, Fudala R, Mason RN, Akopova I, Gryczynski Z, Gryczynski I - ACS Appl Mater Interfaces (2014)

Bottom Line: Silica protected gold mirrors were drop-coated with a solution of silver triangular nanoprisms.The triangular nanoprisms were slowly air-dried to get silver wires that self-assembled on the gold mirrors.The lifetime of Me-ADOTA · Cl dye was significantly reduced (∼ 4 times) in the presence of SWs.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, The University of Texas at Tyler , 3900 University Boulevard, Tyler, Texas 75799, United States.

ABSTRACT
In this report we describe a preparation of silver wires (SWs) on gold mirrors and its application to surface enhanced fluorescence (SEF) using a new methodology. Silica protected gold mirrors were drop-coated with a solution of silver triangular nanoprisms. The triangular nanoprisms were slowly air-dried to get silver wires that self-assembled on the gold mirrors. Fluorescence enhancement was studied using methyl azadioxatriangulenium chloride (Me-ADOTA · Cl) dye in PVA spin-coated on a clean glass coverslip. New Plasmonic Platforms (PPs) were assembled by placing a mirror with SWs in contact with a glass coverslip spin-coated with a uniform Me-ADOTA · Cl film. It was shown that surface enhanced fluorescence is a real phenomenon, not just an enhancement of the fluorescence signal due to an accumulation of the fluorophore on rough nanostructure surfaces. The average fluorescence enhancement was found to be about 15-fold. The lifetime of Me-ADOTA · Cl dye was significantly reduced (∼ 4 times) in the presence of SWs. Moreover, fluorescence enhancement and lifetime did not show any dependence on the excitation light polarization.

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Fluorescence intensity decays of Me-ADOTA·Clon a bare gold film and on SWs on the silica protected gold film.Me-ADOTA·Cl is more strongly quenched on silver wires than onthe silica protected gold mirror alone, leading to a short fluorescencelifetime of 3.6 ns for the SW compared to 14.2 ns for the silica protectedgold mirror alone.
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fig4: Fluorescence intensity decays of Me-ADOTA·Clon a bare gold film and on SWs on the silica protected gold film.Me-ADOTA·Cl is more strongly quenched on silver wires than onthe silica protected gold mirror alone, leading to a short fluorescencelifetime of 3.6 ns for the SW compared to 14.2 ns for the silica protectedgold mirror alone.

Mentions: Moreover, fluorescence intensity decays were measured independentlyat several areas to confirm the results. Figure 4 shows representative fluorescence intensity decays of Me-ADOTA·Clmeasured on SWs (blue line) and on empty areas (red line). The recoveredaverage lifetimes after multiexponential fittings are 14.2 ns on thegold mirror (void of SWs) and 3.6 ns on the SW area. We saw abouta fourfold decrease in the fluorescence lifetime compared to the lifetimeon the area void of SWs.


Preparation of plasmonic platforms of silver wires on gold mirrors and their application to surface enhanced fluorescence.

Shtoyko T, Raut S, Rich RM, Sronce RJ, Fudala R, Mason RN, Akopova I, Gryczynski Z, Gryczynski I - ACS Appl Mater Interfaces (2014)

Fluorescence intensity decays of Me-ADOTA·Clon a bare gold film and on SWs on the silica protected gold film.Me-ADOTA·Cl is more strongly quenched on silver wires than onthe silica protected gold mirror alone, leading to a short fluorescencelifetime of 3.6 ns for the SW compared to 14.2 ns for the silica protectedgold mirror alone.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4232249&req=5

fig4: Fluorescence intensity decays of Me-ADOTA·Clon a bare gold film and on SWs on the silica protected gold film.Me-ADOTA·Cl is more strongly quenched on silver wires than onthe silica protected gold mirror alone, leading to a short fluorescencelifetime of 3.6 ns for the SW compared to 14.2 ns for the silica protectedgold mirror alone.
Mentions: Moreover, fluorescence intensity decays were measured independentlyat several areas to confirm the results. Figure 4 shows representative fluorescence intensity decays of Me-ADOTA·Clmeasured on SWs (blue line) and on empty areas (red line). The recoveredaverage lifetimes after multiexponential fittings are 14.2 ns on thegold mirror (void of SWs) and 3.6 ns on the SW area. We saw abouta fourfold decrease in the fluorescence lifetime compared to the lifetimeon the area void of SWs.

Bottom Line: Silica protected gold mirrors were drop-coated with a solution of silver triangular nanoprisms.The triangular nanoprisms were slowly air-dried to get silver wires that self-assembled on the gold mirrors.The lifetime of Me-ADOTA · Cl dye was significantly reduced (∼ 4 times) in the presence of SWs.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, The University of Texas at Tyler , 3900 University Boulevard, Tyler, Texas 75799, United States.

ABSTRACT
In this report we describe a preparation of silver wires (SWs) on gold mirrors and its application to surface enhanced fluorescence (SEF) using a new methodology. Silica protected gold mirrors were drop-coated with a solution of silver triangular nanoprisms. The triangular nanoprisms were slowly air-dried to get silver wires that self-assembled on the gold mirrors. Fluorescence enhancement was studied using methyl azadioxatriangulenium chloride (Me-ADOTA · Cl) dye in PVA spin-coated on a clean glass coverslip. New Plasmonic Platforms (PPs) were assembled by placing a mirror with SWs in contact with a glass coverslip spin-coated with a uniform Me-ADOTA · Cl film. It was shown that surface enhanced fluorescence is a real phenomenon, not just an enhancement of the fluorescence signal due to an accumulation of the fluorophore on rough nanostructure surfaces. The average fluorescence enhancement was found to be about 15-fold. The lifetime of Me-ADOTA · Cl dye was significantly reduced (∼ 4 times) in the presence of SWs. Moreover, fluorescence enhancement and lifetime did not show any dependence on the excitation light polarization.

Show MeSH
Related in: MedlinePlus