SERS: a versatile tool in chemical and biochemical diagnostics

Hering, Katharina Konstanze; Cialla, Dana; Ackermann, Katrin; Dörfer, Thomas; Möller, Robert; Schneidewind, H.; Mattheis, R.; Fritzsche, Wolfgang; Rösch, Petra; Popp, Jürgen

doi:10.1007/s00216-007-1667-3

Cited by 451 publications

(306 citation statements)

References 137 publications

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“…Surface-enhanced Raman scattering (SERS) is a sensitive method for detecting analyte molecules in gas and liquid phases when they attach to or are present in the vicinity of the surface of plasmonic nanoparticles [1,2]. The particles act as nano-focusing lenses creating "hot-spots" in the electromagnetic field.…”

Section: Introductionmentioning

confidence: 99%

Light enhancement in surface-enhanced Raman scattering at oblique incidence

et al. 2012

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Surface enhanced Raman scattering (SERS) measurements have been carried out at different focusing conditions using objective lenses of different numerical apertures. The experimentally observed dependence of SERS intensity of thiophenol-coated Ag nano-islands shows a close-to-linear scaling with the collection aperture. The linear relationship breaks down for large numerical apertures, which suggests that the scattering is anisotropic. Numerical simulations of realistically shaped Ag nano-islands were carried out, and the spatial distribution of hot-spots has been revealed at different heights near the nano-islands. Local field enhancements of up to 100 times were estimated. The simulation also suggests an explanation for the anisotropy in the scattering observed for larger numerical aperture objectives. This appears to be due to a reduction in the local field enhancement as the electric field vector component in the plane of the shallow metal islands reduces at larger angles of incidence.

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Section: Introductionmentioning

confidence: 99%

Light enhancement in surface-enhanced Raman scattering at oblique incidence

et al. 2012

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“…For example, using nanostructures of noble metals (Cu, Ag, and Au) as the substrate, some organic species have been detected in trace amounts by surface-enhanced Raman scattering (SERS) [12][13][14][15][16][17][18]. The advantages of SERS are its high sensitivity, simplicity, fast detection speed, as well as its capability in the recognition of compounds.…”

Section: Introductionmentioning

confidence: 99%

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

Zhou

Yang

et al. 2010

Nano Res.

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Isomers and homologues of organic pollutants are hard to distinguish-especially in trace amounts-due to the similarities in their physical and chemical properties. We report here that by identifying the Raman characteristics of isomers of monochlorobiphenyls, these compounds can be recognized, even at trace levels, by using the surface-enhance Raman scattering method with silver nanorods as a substrate. When dissolved in acetone, 2-, 3-, and 4-chlorobiphenyls were detected at a concentration of 10 -8 mol/L, at which their characteristic Raman peaks were visible. This study may provide a fast, simple, and sensitive method for the detection and recognition of organic pollutants such as polychlorinated biphenyls.

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“…It is beyond the scope of this contribution to review all of them, but it remains to be mentioned that applications such as optical rulers [ 216 ], sensors [ 217 ], plasmonic substrates for surface enhanced Raman scattering [ 218 ], novel tools for spectroscopy that are sensitive to probe electric quadrupolar or magnetic dipolar transitions [ 136 ], solar cells [ 219 ], high density optical storage devices [ 220 ], or light emitting diodes [ 221 ] were all shown to profit from the incorporation of plasmonic NPs. We anticipate an exciting time in the near-future where eventually some of these applications are not only explored in academia but may find their way into real-world products.…”

Section: Achievements Challenges and Applicationsmentioning

confidence: 99%

Self-assembled plasmonic metamaterials

et al. 2013

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Nowadays for the sake of convenience most plasmonic nanostructures are fabricated by top-down nanofabrication technologies. This offers great degrees of freedom to tailor the geometry with unprecedented precision. However, it often causes disadvantages as well. The structures available are usually planar and periodically arranged. Therefore, bulk plasmonic structures are difficult to fabricate and the periodic arrangement causes undesired effects, e.g., strong spatial dispersion is observed in metamaterials. These limitations can be mitigated by relying on bottom-up nanofabrication technologies. There, self-assembly methods and techniques from the field of colloidal nanochemistry are used to build complex functional unit cells in solution from an ensemble of simple building blocks, i.e., in most cases plasmonic nanoparticles. Achievable structures are characterized by a high degree of nominal order only on a shortrange scale. The precise spatial arrangement across larger dimensions is not possible in most cases; leading essentially to amorphous structures. Such self-assembled nanostructures require novel analytical means to describe their properties, innovative designs of functional elements that possess a desired near-and far-field response, and entail genuine nanofabrication and characterization techniques. Eventually, novel applications have to be perceived that are adapted to the specifics of the self-assembled nanostructures. This review shall document recent progress in this field of research. Emphasis is put on bottom-up amorphous metamaterials. We document the state-of-the-art but also critically assess the problems that have to be overcome.

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SERS: a versatile tool in chemical and biochemical diagnostics

Cited by 451 publications

References 137 publications

Light enhancement in surface-enhanced Raman scattering at oblique incidence

Light enhancement in surface-enhanced Raman scattering at oblique incidence

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

Self-assembled plasmonic metamaterials

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