SERS in PAH-Os and gold nanoparticle self-assembled multilayers

Tognalli, N.; Fainstein, A.; Calvo, Ernesto J.; Bonazzola, Cecilia; Pietrasanta, Lı́a I.; Campoy‐Quiles, Mariano; Etchegoin, P.

doi:10.1063/1.1954707

Cited by 30 publications

(31 citation statements)

References 28 publications

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“…Hence, the gold ball of nanometer size appears to amplify the radiation field of the wire acting as an efficient antenna. This is the result of the strong coupling between light and surface plasmons sustained by the metallic ball and is well known as the mechanism for generation of plasmon polaritons, being active in surface enhanced Raman scattering (SERS) processes [22].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and optical spectroscopy of ZnO nanowires

Güell¹,

Ossó

Goñi

et al. 2009

Superlattices and Microstructures

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Section: Resultsmentioning

confidence: 99%

Synthesis and optical spectroscopy of ZnO nanowires

Güell¹,

Ossó

Goñi

et al. 2009

Superlattices and Microstructures

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“…Indeed, on other occasions the linker molecule that creates the metal nanoparticle structure may also be the target analyte. 73 Similar structures have been manufactured on quartz surfaces using PDDA as a linker molecule. 74 These structures were prepared by immersing clean quartz slides into a 0.5% PDDA solution, followed by immersion in an AgI solution and finally reduction with sodium borohydride.…”

Section: Tethered Nanoparticles With Multiple Functionalisationmentioning

confidence: 99%

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

Brown

Milton

2008

J Raman Spectroscopy

221

201

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We review the performance of various nanoscaled structures needed to support the propagation of the surface plasmons responsible for surface-enhanced Raman scattering (SERS), and assess the potential for the optimisation of the compromise between enhancement and reproducibility that they provide, and hence their utility for relevant applications. We divide these nanostructures into those comprising structured arrays of discrete nanoparticles in two or three dimensions, and those comprising structured or regularly patterned surfaces in two or three dimensions. The most promising in terms of this compromise are those that involve the tethering of functionalised metal nanoparticles to surfaces. They are not only reproducible, but the functionalisation provides a measure of selectivity to relevant target analytes that the majority of SERS applications require.

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“…In the electromagnetic mechanism (EM), the electromagnetic field surrounding the adsorbate is increased by the surface plasmon resonance (SPR) at the adsorbate–substrate interface . In the latter, the substrate is made of metallic materials, such as Ag and Au, disposed in nanometric sizes and partially aggregated in such a way that junctions between them establish regions experiencing intense localized electromagnetic fields, also known as “hot spots.” It is currently accepted that the EM prevails over the CM; nonetheless, the CM can reduce the background fluorescence of particular analytes, thus improving the SERS effect further.…”

Section: Introductionmentioning

confidence: 99%

The Role Played by Graphene Oxide in the Photodeposition and Surface‐Enhanced Raman Scattering Activity of Plasmonic Ag Nanoparticle Substrates

Costa

Maciel

Sales

et al. 2020

Physica Status Solidi (a)

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Layer‐by‐layer photocatalyst films made of TiO2 nanoparticles (TiO2NP) assembled with both poly(sodium 4‐styrenesulfonate) (PSS) and graphene oxide (GO) are used for the photodeposition of plasmonic Ag nanoparticles (AgNPs) and subsequently used in surface‐enhanced Raman scattering (SERS). Both photocatalyst films, TiO2NP/PSS and TiO2NP/GO, are capable of driving the formation of AgNP when they are wetted with a drop of AgNO3 diluted solution and submitted to UV irradiation (254 nm). The photodeposition of AgNP, as monitored by UV–vis spectroscopy, follows a first‐order kinetics process in both films and is slightly faster in the TiO2NP/PSS. In addition, scanning electron microscopy reveals that in the TiO2NP/PSS film, the photodeposited AgNPs are larger and isolated, whereas in the TiO2NP/GO film, they are smaller and highly interconnected. The SERS activity of the substrates is evaluated with rhodamine B. When samples are excited in resonance with rhodamine B absorption (514 nm), GO‐based substrates provide the largest enhancement because GO is able to quench the rhodamine B fluorescence, something that PSS is unable to do. Out of this condition (633 nm), the plasmonic effect of AgNP alone prevails regardless of the presence of GO.

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SERS in PAH-Os and gold nanoparticle self-assembled multilayers

Abstract: Articles you may be interested inResonant Raman spectroscopy of PAH-Os self-assembled multilayers

Cited by 30 publications

References 28 publications

Synthesis and optical spectroscopy of ZnO nanowires

Synthesis and optical spectroscopy of ZnO nanowires

Nanostructures and nanostructured substrates for surface—enhanced Raman scattering (SERS)

The Role Played by Graphene Oxide in the Photodeposition and Surface‐Enhanced Raman Scattering Activity of Plasmonic Ag Nanoparticle Substrates

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