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Fostered by the remarkable progress in the fabrication of nanoparticles and nanostructures, in the last years Surface-Enhanced Raman scattering (SERS) has reached an impressive diffusion in many fields of chemistry and analytical sciences. Several exciting results have been recently reported in SERS-based ultrasensitive detection and molecular imaging. However, more than forty years after its discovery, conventional SERS is still struggling to make its way as a reliable analytical method. The remarkable enhancement of the local electromagnetic field achieved by plasmonic nanostructures is indeed a double-edged sword, as in pushing the sensitivity to the ultimate level, it strongly limits accuracy and reproducibility of the Raman data. In this context, non-plasmonic or hybrid plasmon/dielectric systems are emerging as a promising alternative/complement to conventional SERS. Core/shell systems like T-rex or SHiNERS are only a few examples of these novel SERS-active platforms. In parallel, new theoretical models, based on quantum optomechanical approaches have been recently proposed and developed for describing and predicting plasmonic, non-plasmonic and hybrid (e.g. photo-induced enhanced Raman scattering, PIERS) SERS, also including opto-thermal effects. Moreover, the next-generation of SERS-active materials is facing new challenges in terms of detection strategies, integration with complementary methods and stimuli responsiveness. This Research Topic collects the most recent advances in SERS and related effects, from the viewpoint of theory/models, materials and detection strategies, providing an up-to-date forum for setting the basis for future research in this vibrant field.

SERS (surface enhanced Raman scattering) --- Raman sensing --- SERS theory --- non-plasmonic SERS forensics --- food analysis --- biodiagnostics --- cultural heritage

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La production de denrées alimentaires en suffisance est un problème majeur depuis plusieurs siècles. En effet, La croissance démographique mondiale connait une expansion continue, ce qui engendre inévitablement une augmentation de la consommation alimentaire globale. Afin d’augmenter les productions agricoles, diverses améliorations de notre système de culture ont été apportées. Parmi ceux-ci, nous pouvons retrouver l’utilisation de pesticides. Toutefois, l’utilisation de ces substances a son lot de conséquences et pourrait causer des problèmes de santé publique. Face à l’introduction de pesticides comme le thirame ou thiabendazole dans l’environnement et en particulier leur présence en traces dans les eaux, de nouvelles méthodes de quantification suffisamment sensibles doivent donc être développées dans le but de limiter l’exposition de la population. Ce mémoire a pour objectif de développer une méthode analytique de quantification du thirame dans de l’eau par couplage entre la dilution isotopique et la Spectroscopie Raman Exaltée de Surface (ID-SERS). Ce type de méthode permet, en effet, de diminuer la variabilité du signal et de rendre la méthode reproductible. De plus, une méthode SERS a aussi été développée pour la quantification du thiabendazole, utilisant le même substrat que la méthode de quantification du thirame. Le développement de cette méthode, et en particulier son optimisation, a permis de mettre en évidence des similitudes avec la méthode SERS du thirame. Un compromis entre les deux optimisations a ensuite été trouvé et une analyse sur un mélange des deux pesticides a pu être effectuée. Dès lors, cette détection simultanée ouvre les portes d’une possible quantification des deux pesticides, en même temps.

Chimie analytique --- SERS --- Spectroscopie Raman --- Dilution isotopique --- Pesticides --- Quantification --- Thirame --- Thiabendazole --- ID-SERS --- Physique, chimie, mathématiques & sciences de la terre > Chimie

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With the advances in nanomaterials and nanofabrication, surface-enhanced Raman spectroscopy (SERS) has been extensively developed and applied in the trace detection of various analytes in either a simple or a complicated sample matrix. This includes, but is not limited to, the detection of antibiotic residues in animal-producing meat products, detection of pathogenic bacteria in human body fluid, and detection of heavy metal contamination of water. This book, consisting two review articles and five research articles, covers the most recent progress and advancement in the development and application of various nanomaterials in SERS trace detection. In this book, a broad range of topics is covered, from the synthesis of novel nanomaterials that can provide improved reproducibility of SERS signals to the development of new application protocols that can facilitate the reliable detection of trace amounts of analytes without interfered by the sample matrices significantly. This book is a useful source for both new and advanced researchers in the field of SERS and its application.

Technology: general issues --- SERS --- Ag NPs --- coffee ring --- pesticide detection --- Surface-enhanced Raman spectroscopy (SERS) --- wire mesh --- steel mesh --- SERS platform --- Escherichia coli --- Bacillus subtilis --- biomolecule --- surface enhanced Raman spectroscopy (SERS) --- nanomaterial --- analysis --- identification --- biology --- chemometrics --- resistance --- biosensing --- rapid detection --- Ag nanowires --- tartrazine --- large yellow croaker --- surface-enhanced Raman spectroscopy --- transformer aging --- concentration detection --- circulating tumor cells (CTC) --- prostate cancer (PC3) --- cervical carcinoma (HeLa) --- label-free detection --- SERS --- Ag NPs --- coffee ring --- pesticide detection --- Surface-enhanced Raman spectroscopy (SERS) --- wire mesh --- steel mesh --- SERS platform --- Escherichia coli --- Bacillus subtilis --- biomolecule --- surface enhanced Raman spectroscopy (SERS) --- nanomaterial --- analysis --- identification --- biology --- chemometrics --- resistance --- biosensing --- rapid detection --- Ag nanowires --- tartrazine --- large yellow croaker --- surface-enhanced Raman spectroscopy --- transformer aging --- concentration detection --- circulating tumor cells (CTC) --- prostate cancer (PC3) --- cervical carcinoma (HeLa) --- label-free detection

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La spectroscopie Raman exaltée de surface (SERS) est une technique permettant des analyses rapides, sensibles et spécifiques particulièrement bien adaptée au domaine biomédical. Dans ce contexte, une perspective intéressante est l’utilisation de sondes SERS (combinaison d’un substrat nanostructuré et d’une molécule active en Raman) fonctionnalisées par diverses molécules, permettant le ciblage spécifique de macromolécules biologiques (antigènes, enzymes, ADN, récepteur membranaire, etc). Nous avons développé des sondes SERS utilisant des nanoparticules monométalliques d’or ainsi que des nanoparticules bimétalliques Au@Ag et nous avons étudié leurs performances en présence de différentes molécules actives. Les nanoparticules bimétalliques ont été encapsulées par un polymère afin de leur offrir des possibilités de fonctionnalisation ultérieures. Ces sondes SERS ont été fonctionnalisées et utilisées dans deux applications : la détection d’une enzyme sur support immunochromatographique par fonctionnalisation des sondes avec un anticorps, ainsi que la discrimination à l’aide de l’imagerie spectrale Raman de deux types de cellules cancéreuses par fonctionnalisation des sondes avec l’acide folique.

Chimie analytique --- spectroscopie Raman --- SERS --- imagerie Raman --- immunochromatographie --- cellules cancéreuses --- Physique, chimie, mathématiques & sciences de la terre > Chimie

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Surface-enhanced Raman scattering (SERS) is a research technique that was discovered in the mid-1970s. SERS is a powerful and fast tool for analysis, which has a high detection sensitivity for a great number of chemical and biological molecules. However, it is in this last decade that a very significant explosion of the fabrication of highly sensitive SERS substrates has occurred using novel designs of plasmonic nanostructures and novel fabrication techniques of the latter, as well as new plasmonic materials and hybrid nanomaterials. Thus, this Special Issue is dedicated to reporting on the latest advances in novel plasmonic nanomaterials that are applied to the SERS domain. These developments are illustrated through several articles and reviews written by researchers in this field from around the world.

Research & information: general --- pulsed laser ablation --- acetonitrile (CH3CN) --- Cu/gCN hybrids --- localized surface plasmon resonance (LSPR) --- surface enhanced Raman scattering (SERS) --- surface enhanced resonance Raman scattering (SERRS) --- silver aggregates --- laser-induced synthesis --- surface-enhanced Raman scattering --- hot spots --- SERS --- sensors --- plasmonics --- gold --- silicon --- surface-enhanced Raman scattering (SERS) --- surface plasmon polariton (SPP) --- surface plasmon resonance (SPR) --- nanograting --- nanofabrication --- electron beam lithography --- zinc oxide --- metal oxides --- self-assembly --- bimetallic nanoparticles --- localized surface plasmon --- surface enhanced Raman scattering --- grating effect --- gold nanodisks --- Rayleigh anomaly --- pulsed laser ablation --- acetonitrile (CH3CN) --- Cu/gCN hybrids --- localized surface plasmon resonance (LSPR) --- surface enhanced Raman scattering (SERS) --- surface enhanced resonance Raman scattering (SERRS) --- silver aggregates --- laser-induced synthesis --- surface-enhanced Raman scattering --- hot spots --- SERS --- sensors --- plasmonics --- gold --- silicon --- surface-enhanced Raman scattering (SERS) --- surface plasmon polariton (SPP) --- surface plasmon resonance (SPR) --- nanograting --- nanofabrication --- electron beam lithography --- zinc oxide --- metal oxides --- self-assembly --- bimetallic nanoparticles --- localized surface plasmon --- surface enhanced Raman scattering --- grating effect --- gold nanodisks --- Rayleigh anomaly