Raman spectra can be recorded through accurate detection of inelastic collisions between incident monochromatic radiation and molecules of sample (Li-Chan, 1996). A Raman spectrum is presented as an intensity-versus-wavelength shift much like its infrared (IR) counterparts, although it is significantly...
Fig. 11. Raman spectrum of birnessite (Mn2O4·1.5H2O), collected by means of a laboratory system from a stromatolite sample collected at El Soplao Cave. Compared with reference standards [159,161], the Raman spectrum displays a stronger contribution of the deconvoluted band located at 606 cm...
This system allows to cut the elastic scattering signal very precisely and thus measures the spectrum almost down to the excitation wavelength; however, the use of multiple gratings (and related optical equipment like mirrors) greatly suppresses the Raman signal, which is a drawback for weak ...
Unexpectedly, the Raman spectrum of holfertite does not show any metamictization. The intensities of the UO stretching and bending modes show normal intensity and the bands are sharp. 展开 关键词: holfertite uranyl titanium mineral betafite Raman spectroscopy U–O bond length ...
Electron Spin Resonance SpectrumBiFeO3Field CoolZero Field CoolIn this work, we have investigated the interplay between structure, magnetic and dielectric properties of (Bi 1x Pr x )(Fe 1x Ti x )O 3 ceramics (x=0.03, 0.06 and 0.10) synthesised via solid state reaction method. X-ray ...
The various 2DMs with wide spectrum can be insulator, topological insulator, semiconductor, semi-metal, conductor, or superconductor. Their Raman spectra are discrepant in position, width, and intensity of Raman peaks. Here, we take hexagonal boron nitride (hBN, insulator), Bi2Se3 (topological ...
The results obtained show that increasing laser power causes the characteristic bands of hematite to show up in the spectra of most of the compounds studied whereas the hematite spectrum undergoes band broadening and band shifts. 1997 John Wiley & Sons, Ltd. 展开 ...
Raman spectroscopy has been used to characterize monolayers of vanadia, which had been immobilized on a 20% TiO2/80% SiO2 mixed oxide from a vanadyl alkoxide precursor. Characteristic vibrations observed in the Raman spectrum, as well as UV-visible reflection data, indicate that the most abundan...
12.11A shows the Raman spectrum of Cu-doped ZnO synthesized by hydrothermal method at different Cu-doping concentrations Zn1–xCuxO. Here the samples include ZnO (=0), ZC1 (=0.1), ZC2 (x=0.2), ZC3 (x=0.3), ZC4 (x=0.4), and ZC5 (x=0.5) [28]. At different Cu-doping ...
Resonance Raman spectrum of La(Pc)2: Excitation with (a) 457.9 nm, (b) 496.5 nm, and (c) 647.1 nm. The high-frequency regions of the B-state excitation (λex = 363.8 nm or 406.7 nm) as well as low-frequency regions of Q-state excitation resonance spectra of homoleptic double-...