Luminescence of Gold Nanorod-Quantum Dots Complexes

Trotsiuk, L. L.; Muravitskaya, Alina; Кулакович, О. С.; Гапоненко, С. В.; Demir, Hilmi Volkan

doi:10.1142/s0219581x19400027

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…There are extensive theoretical calculations and experiments that describe conditions for obtaining plasmon-enhanced fluorescence. [34,35,[58][59][60][61][62][63] First, it is necessary to overlap the absorption and/or emission spectra of the emitter with a localized surface plasmon resonance (LSPR) of noble metal nanoparticles. Secondly, many works state the optimal distance between an emitter and a spherical plasmonic nanoparticle is 10-20 nm.…”

Section: Fluorescence Experimentsmentioning

confidence: 99%

Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems

et al. 2019

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Plasmon-exciton coupling is of great importance to many optical devices and applications. One of the coupling manifestations is plasmon-enhanced fluorescence. Although this effect is demonstrated in numerous experimental and theoretical works, there are different particle shapes for which this effect is not fully investigated. In this work electrostatic complexes of gold nanorods and CdSe/CdZnS quantum dots were studied. Double-resonant gold nanorods have an advantage of the simultaneous enhancement of the absorption and emission when the plasmon bands match the excitation and fluorescence wavelengths of an emitter. A relationship between the concentration of quantum dots in the complexes and the enhancement factor was established. It was demonstrated that the enhancement factor is inversely proportional to the concentration of quantum dots. The maximal fluorescence enhancement by 10.8 times was observed in the complex with the smallest relative concentration of 2.5 quantum dots per rod and approximately 5 nm distance between them. Moreover, the influence of quantum dot location on the gold nanorod surface plays an important role. Theoretical study and experimental data indicate that only the position near the nanorod ends provides the enhancement. At the same time, the localization of quantum dots on the sides of the nanorods leads to the fluorescence quenching.

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Section: Fluorescence Experimentsmentioning

confidence: 99%

Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems

et al. 2019

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“…Other nanostructures, such as QDs and UCNPs, have also demonstrated distance-dependent SEF using PE-coated Au NRs. − Trotsiuk et al coated Au NRs with PSS/PDADMAC bilayers to enhance the fluorescence of CdSe/CdZnS QDs, which were deposited onto the PE surface. The QD loading was optimized to 2.5 QDs per NR, with increased loading, resulting in decreasing fluorescence.…”

Section: Distance-dependent Sef Using Au Nrsmentioning

confidence: 99%

“…Adding 1 bilayer resulted in the fluorescence EF increasing from around 6 to 10.8. Further increasing the number of bilayers to 3 decreased the enhancement to <2. , Feng et al used Au NRs coated with PSS/PAH to enhance the fluorescence of NaYF 4 :Yb,Er UCNPs. Si slides were first coated with Au NRs.…”

Section: Distance-dependent Sef Using Au Nrsmentioning

confidence: 99%

Recent Progress in Surface-Enhanced Fluorescence Using Gold Nanorods

Catingan,

Moores

2024

ACS Appl. Nano Mater.

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Plasmonic nanoparticles have been intensely used in research because they possess powerful optical properties. Gold nanorods (Au NRs), in particular, feature the interesting ability to absorb and scatter light in the near-infrared region through their longitudinal localized surface plasmon resonance. This property is particularly interesting in biology because these wavelengths are associated with maximum tissue penetration. The interplay between plasmonic nanoparticles and fluorophores has also triggered exciting research. Specifically, illuminating the Au NRs produces an enhanced electromagnetic field in the vicinity of the particles. This allows nearby fluorophores to feature enhanced optical properties through a phenomenon known as surfaceenhanced fluorescence. This effect, however, must be counterbalanced by potential quenching that can happen from the Au NRs to the fluorophore. Systems have been developed whereby a spacer layer insulates the Au NR from the fluorophore. Multiple studies have explored different materials to use as the spacer layer such as silica or polyelectrolyte multilayers. Many of these studies have also investigated the optimal spacer thickness for achieving maximum enhancement. This review summarizes and provides an outlook on important developments in this field that have been reported in the last 10 years.

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Luminescence of Gold Nanorod-Quantum Dots Complexes

Cited by 2 publications

References 8 publications

Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems

Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems

Recent Progress in Surface-Enhanced Fluorescence Using Gold Nanorods

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