The Experts below are selected from a list of 213 Experts worldwide ranked by ideXlab platform
John R Lombardi - One of the best experts on this subject based on the ideXlab platform.
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enhanced Raman Scattering with dielectrics
Chemical Reviews, 2016Co-Authors: Ivano Alessandri, John R LombardiAbstract:Dielectrics represent a new frontier for surface-enhanced Raman Scattering. They can serve as either a complement or an alternative to conventional, metal-based SERS, offering key advantages in terms of low invasiveness, reproducibility, versatility, and recyclability. In comparison to metals, dielectric systems and, in particular, semiconductors are characterized by a much greater variety of parameters and properties that can be tailored to achieve enhanced Raman Scattering or related effects. Light-trapping and subwavelength-focusing capabilities, morphology-dependent resonances, control of band gap and stoichiometry, size-dependent plasmons and excitons, and charge transfer from semiconductors to molecules and vice versa are a few examples of the manifold opportunities associated with the use of semiconductors as SERS-active materials. This review provides a broad analysis of SERS with dielectrics, encompassing different optical phenomena at the basis of the Raman Scattering enhancement and introducing...
Atsushi Taguchi - One of the best experts on this subject based on the ideXlab platform.
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Deep-Ultraviolet Surface-Enhanced Raman Scattering
Far- and Deep-Ultraviolet Spectroscopy, 2020Co-Authors: Atsushi TaguchiAbstract:Surface-enhanced Raman Scattering (SERS) is a technique for amplifying a Raman Scattering signal, which is intrinsically weak and therefore hard to detect. The Raman enhancement factor can be as high as 102–106 and may even be as high as 1015, which is sufficient to detect Raman Scattering from single molecules. By combining this powerful SERS technique with deep-ultraviolet (DUV) resonance Raman spectroscopy, ultrasensitive detection and analysis of molecules by DUV resonance Raman spectroscopy become possible. In this chapter, recent progress in DUV-SERS is reviewed. Also, the available metals for selection as SERS substrates are discussed. As an application of DUV-SERS to molecular nanoimaging, the development of DUV tip-enhanced Raman Scattering (TERS) is also described. Finally, some issues to be overcome and future perspectives are discussed.
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Nano-Raman Scattering Microscopy: Resolution and Enhancement
Chemical Reviews, 2017Co-Authors: Satoshi Kawata, Taro Ichimura, Atsushi Taguchi, Yasuaki KumamotoAbstract:Raman Scattering microscopy is becoming one of the hot topics in analytical microscopy as a tool for analyzing advanced nanomaterials, such as biomolecules in a live cell for the study of cellular dynamics, semiconductor devices for characterizing strain distribution and contamination, and nanocarbons and nano-2D materials. In this paper, we review the recent progress in the development of Raman Scattering microscopy from the viewpoint of spatial resolution and Scattering efficiency. To overcome the extremely small cross section of Raman Scattering, we discuss three approaches for the enhancement of Scattering efficiency and show that the Scattering enhancement synergistically increases the spatial resolution. We discuss the mechanisms of tip-enhanced Raman Scattering, deep-UV resonant Raman Scattering, and coherent nonlinear Raman Scattering for micro- and nanoscope applications. The combinations of these three approaches are also shown as nanometer-resolution Raman Scattering microscopy. The critical is...
Katrin Kneipp - One of the best experts on this subject based on the ideXlab platform.
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Surface-Enhanced Raman Scattering - Surface-enhanced Raman Scattering
Physics Today, 2020Co-Authors: Katrin KneippAbstract:The remarkable 14-order-of-magnitude signal enhancement that can occur during Raman Scattering from molecules on metallic nanostructures turns the normally weak inelastic-Scattering effect into a single-molecule spectroscopic probe.
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surface enhanced Raman Scattering physics and applications
2006Co-Authors: Katrin Kneipp, Martin Moskovits, Harald KneippAbstract:Surface-Enhanced Raman Spectroscopy: a Brief Perspective.- Electromagnetic Mechanism of SERS.- Electromagnetic Theory of SERS.- Coupled Plasmonic Plasmon/Photonic Resonance Effects in SERS.- Estimating SERS Properties of Silver-Particle Aggregates through Generalized Mie Theory.- Studying SERS from Metal Nanoparticles and Nanoparticles Aggregates with Continuum Models.- SERS From Transition Metals and Excited by Ultraviolet Light.- Electronic Mechanisms of SERS.- Two-Photon Excited Surface-Enhanced Raman Scattering.- Applications of the Enhancement of Resonance Raman Scattering and Fluorescence by Strongly Coupled Metallic Nanostructures.- Tip-Enhanced Raman Spectroscopy (TERS).- Tip-Enhanced Near-Field Raman Scattering: Fundamentals and New Aspects for Molecular Nanoanalysis/Identification.- Single-Molecule SERS Spectroscopy.- Temporal Fluctuations in Single-Molecule SERS Spectra.- Single-Molecule Surface-Enhanced Resonance Raman Spectroscopy of the Enhanced Green Fluorescent Protein EGFP.- Surface-Enhanced Vibrational Spectroelectrochemistry: Electric-Field Effects on Redox and Redox-Coupled Processes of Heme Proteins.- Nanosensors Based on SERS for Applications in Living Cells.- Biomolecule Sensing with Adaptive Plasmonic Nanostructures.- Glucose Sensing with Surface-Enhanced Raman Spectroscopy.- Quantitative Surface-Enhanced Resonance Raman Spectroscopy for Analysis.- Rapid Analysis of Microbiological Systems Using SERS.- Surface-Enhanced Raman Scattering for Biomedical Diagnostics and Molecular Imaging.- Ultrasensitive Immunoassays Based on Surface-Enhanced Raman Scattering by Immunogold Labels.- Detecting Chemical Agents and Their Hydrolysis Products in Water.
Ivano Alessandri - One of the best experts on this subject based on the ideXlab platform.
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enhanced Raman Scattering with dielectrics
Chemical Reviews, 2016Co-Authors: Ivano Alessandri, John R LombardiAbstract:Dielectrics represent a new frontier for surface-enhanced Raman Scattering. They can serve as either a complement or an alternative to conventional, metal-based SERS, offering key advantages in terms of low invasiveness, reproducibility, versatility, and recyclability. In comparison to metals, dielectric systems and, in particular, semiconductors are characterized by a much greater variety of parameters and properties that can be tailored to achieve enhanced Raman Scattering or related effects. Light-trapping and subwavelength-focusing capabilities, morphology-dependent resonances, control of band gap and stoichiometry, size-dependent plasmons and excitons, and charge transfer from semiconductors to molecules and vice versa are a few examples of the manifold opportunities associated with the use of semiconductors as SERS-active materials. This review provides a broad analysis of SERS with dielectrics, encompassing different optical phenomena at the basis of the Raman Scattering enhancement and introducing...
Andrés Cantarero - One of the best experts on this subject based on the ideXlab platform.
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Raman Scattering Applied to Materials Science
Procedia Materials Science, 2020Co-Authors: Andrés CantareroAbstract:Abstract One of the most powerful techniques to extract physical and chemical information of a material is the light Scattering. Opposite to x-ray Scattering for instance, where an average of the sample properties is obtained, Raman Scattering is a local probe which can be used to detect inhomogeneities, local strain, lack of crystallinity, anharmonicities or information on the electronic structure by means of resonant Raman Scattering. In this work, we will analyze the main contributions of Raman Scattering in Materials Sciences. After a brief introduction of the technique and the equipment needed for the physical measurements, we will give practical examples of Raman Scattering measurements applied to a number of materials and the valuable information obtained in every example.
