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Showing 1 to 20 of 87 for “"Resonance Raman"”.
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Resonance raman scattering studies of GaAs-A1As superlattices
"We have made resonance Raman scattering studies of folded LA phonons and quantized LO phonons in several GaAs-AlAs superlattices. The motivation for this work was to study the electronic structure and the electron-phonon interaction in these structures. The samples were not intentionally doped. …
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Resonance Raman spectroscopy of single-walled carbon nanotubes
… main technique for probing the phonon spectra is Raman spectroscopy and the many unique and unusual features of the Raman spectra of carbon nanotubes are highlighted. Various features of the first-order Raman spectra are emphasized, with regard to their 1D behavior and special characteristics, …
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Characterization of mucosal dysplasia with ultraviolet resonance Raman spectroscopy
Thesis (Ph. D.)--Harvard--Massachusetts Institute of Technology Division of Health Sciences and Technology, 1997.
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Resonance Raman Scattering Studies of Gallium-Arsenide - Aluminum-Arsenide Superlattices
We have made resonance Raman scattering studies of folded LA phonons and quantized LO phonons in several GaAs-AlAs superlattices. The motivation for this work was to study the electronic structure and the electron-phonon interaction in these structures. The samples were not intentionally doped. The …
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Evaluations of single walled carbon nanotubes using resonance Raman spectroscopy
… reports the results of two studies which use resonance Raman scattering to evaluate the vibrational properties of single walled carbon nanotubes (SWNTs). In the first study, we report an evaluation of second-order combination and over-tone modes in highly ordered pyrolytic graphite (HOPG), in …
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Precision studies of stimulated resonance Raman scattering in atomic beams
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1984.
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Double resonance Raman spectra of graphene : a full 2D calculation
Visible range Raman spectra of graphene are generated based on the double resonant process employing a full two-dimensional numerical calculation applying second-order perturbation theory. Tight binding expressions for both the TO phonon dispersion and the [pi] - [pi]* electronic bands are used, …
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Surface enhanced resonance Raman spectroscopy of dyes: semi-quantitative trace analysis
… been carried out by means of surface enhanced Raman spectroscopy (SERS) and/or surface enhanced resonance Raman spectroscopy (SERRS) using citrate- and/or borohydride-reduced silver colloids employing laser exciting wavelengths equal to 514.5 and/or 632.8 nm. SERS and/or SERRS spectra are …
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Application of surface-enhanced resonance Raman spectroscopy to chlorophyll and chlorophyll derivatives
… photosynthesis. In Sections 1-3 surface-enhanced resonance Raman spectroscopy (SERRS) has been employed to obtain Raman vibrational spectra for chlorophyll a, pheophytin a, and chlorophyll b adsorbed on a roughened silver electrode and excited from within the Soret band to the lowest energy …
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Chlorine dioxide photochemistry in solution: time-resolved resonance Raman and femtosecond pump-probe studies
… dioxide (OClO) are studied using time-resolved resonance Raman (TRRR) and femtosecond pump-probe (FPP) spectroscopy. OClO photochemistry is investigated in a variety of solvents in order to ascertain the influence of environment on the photoreactivity of this compound. Specifically, the effect …
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The Effect of Red Blood Cell Velocity on Oxygenation Measurements using Resonance Raman Spectroscopy
Resonance Raman spectroscopy can be used to estimate the hemoglobin oxygen saturation. Previous studies have demonstrated that exposure of oxygenated red blood cells to laser illumination may result in photo-induced displacement of oxygen from hemoglobin. In this study, an in vitro model was used …
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Experimental and Theoretical Study of Resonance Raman Spectroscopy in Ground and Excited Electronic States
… and selective control of molecular processes. Raman scattering is particularly useful in observing the vibrational properties of molecules, and identifying compounds based on structure. While the experimental measurements provide structural information on the vibrational transitions, the …
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Resonance Raman spectroscopy in the analysis of residual lignin and other unsaturated structures in chemical pulps
Ultraviolet resonance Raman spectroscopy (UVRRS) was applied to determine the characteristic vibrations of several monomeric and dimeric lignin model compounds. The characteristic vibrations of p-hydroxyphenyl, guaiacyl, and syringyl lignin structures were then detected in the UVRR spectra of …
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