Advances in the Applications of Surface Enhanced Raman Scattering, 2nd Edition
A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".
Deadline for manuscript submissions: 31 December 2024 | Viewed by 126
Special Issue Editor
Interests: metal nanoparticles; Raman spectroscopy; SERS; laser ablation in liquid; nanomedicine; heterogeneous catalysis; computational chemistry
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Nanoparticles have great capacity to adsorb molecules or ions by virtue of their large surface development, establishing strong interactions with the “active sites” of the nanoparticle surface, seen as structural defects of the same surface with special chemical valences. The formation of surface complexes demonstrates the reactivity of the nanostructured surface, which can catalyze chemical reactions as well as interact with biological systems. From here, possible applications of the nanoparticles themselves are derived, especially in the field of heterogeneous catalysis for both chemical and photochemical reactions. In addition, nanoparticles composed of metals have particular optical properties due to the presence of “localized plasmons”. The strong localization of the electromagnetic field associated with the localized plasmons allows obtaining an enhancement of several orders of magnitude (usually up to 107 factors) of the Raman response in the so-called SERS (surface enhanced Raman scattering) effect when molecules are adsorbed on nanostructured surfaces of metals with high optical reflectivity, such as Ag, Au, and Cu. In addition to this mechanism, a chemical enhancement contribution to the Raman signal of the adsorbed molecule can also be effective, due to the perturbation of the molecular polarizability caused by the formation of chemical complexes of the molecule itself with the active sites of the metallic surface. Hence, by means of the SERS enhancement, Raman spectroscopy allows identifying, at trace level, reactants, products, or byproducts of catalytic reactions, as well as pollutants. In this Special Issue, our interest is focused on the recent applications of SERS spectroscopy, especially in the fields of heterogeneous catalysis, sensoring, biomedicine, and environmental protection.
Prof. Dr. Maurizio Muniz-Miranda
Guest Editor
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Keywords
- surface-enhanced Raman scattering
- enhancement
- applications
- nanoparticles
- plasmons
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