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Raman spectroscopy

About: Raman spectroscopy is a research topic. Over the lifetime, 122605 publications have been published within this topic receiving 2891083 citations. The topic is also known as: Raman Spectrum Analysis & spectrum Analysis, Raman.


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Book ChapterDOI
01 Jan 1996
TL;DR: In this article, a review of the state of the art in spatially and temporally precise laser diagnostics for temperature and species is presented, including two-dimensional implementations, their state of maturity assessed, and major remaining research issues identified.
Abstract: Nonintrusive laser probing of unsteady combustion processes provides the capability for the remote, in—situ, spatially and temporally precise measurement of, among other parameters, gas temperature and species concentrations. The predominant spatially—precise laser diagnostics for temperature and species include spontaneous Raman scattering (RS) and coherent anti-Stokes Raman spectroscopy (CARS) for measurements of major, i.e., ≥~ 1%, constituents, and laser—induced fluorescence spectroscopy (LIFS) and degenerate four wave mixing (DFWM) for minor, ppm level, species. Rayleigh scattering can provide total density measurements. These techniques are reviewed, including two-dimensional implementations, their state of maturity assessed, and major remaining research issues identified.

472 citations

Book
21 Feb 2011
TL;DR: In this article, a detailed analysis of Raman Spectroscopy in Graphene Releated Systems is presented, including the G-band and time-independent perturbations.
Abstract: Part I Materials Science and Raman Spectroscopy Background The sp^2 Nanocarbons: Prototypes for Nanoscience and Nanotechnology Electrons in sp^2 Nanocarbons Vibrations in sp^2 Nanocarbons Raman Spectroscopy: From Graphite to sp^2 Nanocarbons Quantum Description of Raman Scattering Symmetry Aspects and Selection Rules: Group Theory Part II Detailed Analysis of Raman Spectroscopy in Graphene Releated Systems The G-band and time-Independent Perturbations The G-band and the Time-Dependent Perturbations Resonance Raman Scattering: Experimental Observations of the Radial Breathing Mode Theory of Excitons in Carbon Nanotubes Tight-Binding Method for Calculating Raman Spectra Dispersive G'-band and Higher-Order Processes:the Double Resonance Process Disorder Effects in the Raman Spectra of sp^2 Carbons Summary of Raman on sp^2 Nanocarbons

471 citations

Journal ArticleDOI
TL;DR: In this paper, the micro-Raman spectra of hematite, magnetite and other iron oxides were compared with literature data and compared with a Stokes-Anti-Stokes procedure was used to control the local temperature during the measurement and also for calibration of the wavenumbers.
Abstract: Films and powders of iron oxide (Fe2O3) prepared by two different sol–gel syntheses, starting from Fe(NO3)3·9H2O or FeCl3·6H2O, were investigated by Raman microscopy. Different phases with different morphology were produced according to the preparation. The spectra obtained in the micro-Raman configuration were compared with the ambiguous data in the literature given by conventional Raman techniques. The principal difficulty in the correct interpretation of the Raman spectrum of the iron oxides is the co-existence of different phases. Contradictory results are also explained by laser–induced thermal effects which easily change the wavenumbers and lineshapes of the phonons. A Stokes–Anti-Stokes procedure was utilized to control the local temperature during the measurement and also for calibration of the wavenumbers. The micro-Raman spectra of hematite, magnetite and other iron oxides are presented and compared with literature data. Copyright © 1999 John Wiley & Sons, Ltd.

471 citations

Journal ArticleDOI
TL;DR: Field-effect transistors made from the few-layer PdSe2 display tunable ambipolar charge carrier conduction with a high electron field-effect mobility of ∼158 cm2 V-1 s-1, indicating the promise of this anisotropic, air-stable, pentagonal 2D material for 2D electronics.
Abstract: Most studied two-dimensional (2D) materials exhibit isotropic behavior due to high lattice symmetry; however, lower-symmetry 2D materials such as phosphorene and other elemental 2D materials exhibit very interesting anisotropic properties. In this work, we report the atomic structure, electronic properties, and vibrational modes of few-layered PdSe2 exfoliated from bulk crystals, a pentagonal 2D layered noble transition metal dichalcogenide with a puckered morphology that is air-stable. Micro-absorption optical spectroscopy and first-principles calculations reveal a wide band gap variation in this material from 0 (bulk) to 1.3 eV (monolayer). The Raman-active vibrational modes of PdSe2 were identified using polarized Raman spectroscopy, and a strong interlayer interaction was revealed from large, thickness-dependent Raman peak shifts, agreeing with first-principles Raman simulations. Field-effect transistors made from the few-layer PdSe2 display tunable ambipolar charge carrier conduction with a high elec...

471 citations

Journal ArticleDOI
TL;DR: In this paper, Raman scattering the shear and layer breathing modes in multilayer MoS was used to identify polarization measurements and symmetry analysis, with different scaling for odd and even layers.
Abstract: We study by Raman scattering the shear and layer breathing modes in multilayer MoS${}_{2}$. These are identified by polarization measurements and symmetry analysis. Their positions change significantly with the number of layers, with different scaling for odd and even layers. A chain model can explain the results, with general applicability to any layered material, allowing a reliable diagnostic of their thickness.

470 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235,220
202210,775
20214,240
20204,764
20194,957
20184,893