Results 251 to 260 of about 132,397 (310)
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Raman spectra of graphene ribbons
Journal of Physics: Condensed Matter, 2010Raman spectra of graphene nanoribbons with zigzag and armchair edges are calculated within non-resonant Raman theory. Depending on the edge structure and polarization direction of the incident and scattered photon beam relative to the edge direction, a symmetry selection rule for the phonon type appears.
R, Saito +3 more
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The intrinsic temperature effect of the Raman spectra of graphite
Applied Physics Letters, 1999 The Raman spectra of ion-implanted highly oriented pyrolytic graphite (HOPG) are reported, in which an additional mode at 1083 cm(-1) and three doublet structures in the positions of similar to 1350, similar to 2450, and similar to 2710 cm(-1) are ...
Ping-Heng Tan +2 more
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Resonance Raman spectra of chloroperoxidase
Biochimica et Biophysica Acta (BBA) - Protein Structure, 1976Resonant Raman spectra of native and reduced chloroperoxidase are presented and the principal features are tabulated. Comparisons are made with the spectra of other heme proteins. The correlation proposed for certain Raman “marker band” positions and spin or oxidation state is found not to hold for these spectra.
P M, Champion +4 more
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Hemoglobin: Resonance Raman spectra
Biochimica et Biophysica Acta (BBA) - Protein Structure, 1972Abstract Raman spectra have been recorded for several hemoglobin derivatives in dilute solution. They exhibit a complex set of bands, arising from vibrations of the heme groups. Two of the bands offer promise as structural probes, inasmuch as their intensities correlate inversely with the degree to which the iron atoms are out of plane.
T C, Strekas, T G, Spiro
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The Raman spectra of the cylophanes
Spectrochimica Acta Part A: Molecular Spectroscopy, 1981Abstract Raman spectra have been obtained for the entire series of [2 n ]-cyclophanes and along with the i.r. spectra, several band assignments have been proposed. A correlation of the frequencies of the in-plane ring modes of the cyclophane with those of the identically substituted methylated benzene has been made.
Paul H. Scudder +3 more
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Raman Spectra of NanophaseCr2O3
Journal of Raman Spectroscopy, 1996The Raman spectra of nanometer-sized Cr2O3 particles (annealed in air and in vacuum at different temperatures) at room temperature are reported. The results show that the correlation between the change of the Raman spectrum of nanometer Cr2O3 and its crystal size is different from that of other nanometer-sized materials.
Jian Zuo +5 more
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Ferroelectrics, 1971
The Raman spectra of Ba2NaNb5O15 single crystals were recorded for various scattering configurations from 77°K to 843°K. Splittings of the vibrational modes due to electrostatic and anisotropic forces were found to be small. The line-widths of the 650 cm-1 and the 280 cm-1 modes were found to increase with increasing temperature.
L. C. Bobb, I. Lefkowitz, L. Muldawer
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The Raman spectra of Ba2NaNb5O15 single crystals were recorded for various scattering configurations from 77°K to 843°K. Splittings of the vibrational modes due to electrostatic and anisotropic forces were found to be small. The line-widths of the 650 cm-1 and the 280 cm-1 modes were found to increase with increasing temperature.
L. C. Bobb, I. Lefkowitz, L. Muldawer
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Raman spectra of Nd1.85Ce0.15CuO4
Solid State Communications, 1991Abstract We present the polarized Raman scattering spectra of the Nd 1.85 Ce 0.15 CuO 4 single crystal at room temperature. In addition to the three known Raman active phonons of this high temperature oxide at 227cm −1 (A 1g ), 330 cm −1 (B 1g ), and 477 cm −1 (E g ), the remaining E g symmetry mode at 122 cm −1 is clearly observed.
Z.V. Popovic, A. Sacuto, M. Balkanski
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Spectroscopy Letters, 1973
Abstract The spectroscopy of porphyrins has been developing rapidly during the last two decades, this class of compounds being of great biological importance and possessing a number of significant properties. Different spectroscopic techniques, viz., electronic spectroscopy including fine-structure quasiline spectra (Shpolsky effect), infrared ...
K. N. Solovyov +3 more
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Abstract The spectroscopy of porphyrins has been developing rapidly during the last two decades, this class of compounds being of great biological importance and possessing a number of significant properties. Different spectroscopic techniques, viz., electronic spectroscopy including fine-structure quasiline spectra (Shpolsky effect), infrared ...
K. N. Solovyov +3 more
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Journal of Quantitative Spectroscopy and Radiative Transfer, 1982
Abstract The normal modes of the Raman-active phonons in the center of the Brillouin zone in a natural monocrystal of Mg 2 SiO 4 were measured by using Raman scattering. All of the modes predicted by group theory were observed and measured. Some deviations from previously published values in synthetic samples were observed for the low energy phonons.
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Abstract The normal modes of the Raman-active phonons in the center of the Brillouin zone in a natural monocrystal of Mg 2 SiO 4 were measured by using Raman scattering. All of the modes predicted by group theory were observed and measured. Some deviations from previously published values in synthetic samples were observed for the low energy phonons.
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