Enhanced Fluorescent Immunoassays on Silver Fractal-like Structures

Shtoyko, Tanya; Matveeva, Evgenia G.; Chang, I-Fen; Gryczyński, Zygmunt; Goldys, Ewa M.; Gryczyński, Ignacy

doi:10.1021/ac7019915

Cited by 59 publications

(53 citation statements)

References 31 publications

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“…Tanya Shtoyko observed significant fluorescence enhancement signal from the silver fractals nanostructure, when fabricated using the electrochemical reduction method. He found that the fluorescence enhancement effect is critically dependent on the topography and dielectric properties of fabricated sample [70]. Due to the LSPR, the more the "hotspots" in the fractal-like nanostructure, the stronger EF will be obtained.…”

Section: Pef From Metallic Fractal-like Substratementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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Abstract:The optically generated collective electron density waves on metal-dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle's surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.

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Section: Pef From Metallic Fractal-like Substratementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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“…Among the most notable of these are nanotriangle arrays or bowties 151,153,154 and silver fractals (fabricated via electrochemical growth). 155 In each of these cases, the resulting plasmonic nanostructures resulted in significantly greater MEF enhancements than silver island films for the particular fluorophores employed. …”

Section: Traditional Metal-enhanced Fluorescence Nanostructures For Smentioning

confidence: 99%

Recent advances in plasmonic nanostructures for sensing: a review

2015

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“…[3][4][5][6][7][8] Fluorescence enhancement based on the localized surface plasmon resonance of a silver island structure is well known as a typical fluorescence enhancement technique. Such a structure can improve the sensitivity of target detection up to approximately 50-fold compared with that of a flat control surface.…”

Section: Introductionmentioning

confidence: 99%