Visualized method of chemical enhancement mechanism on SERS and TERS

Xia, Lixin; Chen, Maodu; Zhao, Xiuming; Zhang, Zhenglong; Ji, Xia; Xu, Hongxing; Sun, Mengtao

doi:10.1002/jrs.4504

Cited by 110 publications

(89 citation statements)

References 72 publications

(123 reference statements)

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“…Compared with local enhanced EM field generated in randomly patterned metallic nanostructures, the SP near-field coupling between particle dimers can lead to the frequency shift of LSPR and unusually huge EM fields for nanostructure with order arrays. As a result, the precise tuning of LSPR, such as by adjusting the shape and arrangement of metal nanopartices, play an important role in pursuing the high-efficiency coupling effect of the fluorophore and the local-enhanced EM field [55,56]. It is reported that considerable fluorescence enhancement factor of 100-fold, from the silver nanorod arrays nanostructure with a regular distribution was obtained as compared to the controlled sample [57].…”

Section: Pef From Nanorod Arrays 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 Nanorod Arrays Substratementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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“…In a recent report, a photo-induced charge transfer mechanism was studied by representing the charge difference density between the metal and molecule at the resonant electronic transition [21]. Intramolecular charge redistribution or transfer indicates molecular resonance and intracluster charge redistribution indicates electromagnetic enhancement.…”

Section: Localized Surface Plasmonsmentioning

confidence: 99%

Tip-enhanced Raman scattering—Targeting structure-specific surface characterization for biomedical samples

Sharma

Deckert‐Gaudig

Deckert

2015

Advanced Drug Delivery Reviews

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“…[38][39][40] One of the most promising applications of SPPs, especially localized SPPs, is surface-enhanced Raman scattering (SERS), which has been studied both theoretically and experimentally for many decades. [12][13][14][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] As an optical fingerprint, Raman spectra, which could be used to analyze chemical structures, are widely used in scientific investigations and material analysis. However, as a weak process, the small Raman scattering cross-section makes the detection of a small number of molecules a problem even after the laser power is increased.…”

Section: Introductionmentioning

confidence: 99%

“…12,52,58 In addition, the charge transfer processes, which are the electronic structure variation of molecules adsorbed on metal surfaces, also play an important role in the SERS effect. [45][46][47][48]54 The area where the highest EM field enhancement is generated in a nanostructure is called a 'hot spot', such as the nanogap between the nanoparticle dimer and the gaps between nanoparticles and wires. The Raman signals in most SERS experiments are obtained at the tiny hot spots.…”

Section: Introductionmentioning

confidence: 99%

Nanowire-supported plasmonic waveguide for remote excitation of surface-enhanced Raman scattering

et al. 2014

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Due to its amazing ability to manipulate light at the nanoscale, plasmonics has become one of the most interesting topics in the field of light-matter interaction. As a promising application of plasmonics, surface-enhanced Raman scattering (SERS) has been widely used in scientific investigations and material analysis. The large enhanced Raman signals are mainly caused by the extremely enhanced electromagnetic field that results from localized surface plasmon polaritons. Recently, a novel SERS technology called remote SERS has been reported, combining both localized surface plasmon polaritons and propagating surface plasmon polaritons (PSPPs, or called plasmonic waveguide), which may be found in prominent applications in special circumstances compared to traditional local SERS. In this article, we review the mechanism of remote SERS and its development since it was first reported in 2009. Various remote metal systems based on plasmonic waveguides, such as nanoparticle-nanowire systems, single nanowire systems, crossed nanowire systems and nanowire dimer systems, are introduced, and recent novel applications, such as sensors, plasmon-driven surface-catalyzed reactions and Raman optical activity, are also presented. Furthermore, studies of remote SERS in dielectric and organic systems based on dielectric waveguides remind us that this useful technology has additional, tremendous application prospects that have not been realized in metal systems.

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Visualized method of chemical enhancement mechanism on SERS and TERS

Cited by 110 publications

References 72 publications

Recent Progress on Plasmon-Enhanced Fluorescence

Recent Progress on Plasmon-Enhanced Fluorescence

Tip-enhanced Raman scattering—Targeting structure-specific surface characterization for biomedical samples

Nanowire-supported plasmonic waveguide for remote excitation of surface-enhanced Raman scattering

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