scholarly journals Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca0.91-XCe0.09Rb0.04Csx[(Zr0.50Ti0.45)Al0.05]O3, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement

2020 ◽  
Vol 20 (2) ◽  
pp. 81-94
Author(s):  
K. Hasnat ◽  
N. Kamel ◽  
D. Moudir ◽  
Y. Mouheb ◽  
S. Kamariz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Radioactive Waste ◽  
Alkaline Earth ◽  
Ftir Analysis ◽  
Complex Perovskite ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Alkaline Earth Elements ◽  
Porous Microstructure ◽  
Orthorhombic Perovskite

AbstractPerovskite is able to sequester simultaneously, in its structure, both actinides and alkaline-earth elements. This study is an attempt to synthesize a complex perovskite Ca0.91-xCe0.09Rb0.04Csx[(Zr0.50Ti0.45)Al0.05]O3 (0.2≤x≤0.4), doped in the same time, with Ce, Cs and Rb. The synthesis is conducted by sintering at 1150°C during 16h. XRX analysis confirms the perovskite formation. SEM observations show a less porous microstructure. FTIR analysis reveals TiO6, Ti-O-Ti, Ti-O and Zr-O vibrations. Raman spectroscopy indicates many orthorhombic perovskite active modes, as: Ti-O6 and Ti-O3 torsions, ZrO7, CaO8 vibrations, the totally symmetric oxygen, and the O-octahedron cage rotation.

Raman Spectroscopic Study Of Ion-Implanted And Annealed Silicon.

1995 ◽  
Vol 406 ◽  
Author(s):  
David. D. Tuschel ◽  
James P. Lavine ◽  
Jeffrey B. Russell
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Spectroscopic Study ◽  
Complete Recovery ◽  
Acoustic Mode ◽  
Raman Intensity ◽  
Optical Mode ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Transverse Acoustic

AbstractRaman spectroscopy is used to characterize silicon implanted with arsenic and then annealed. The implant dose ranged from 2 × 1012 to 2 × 1013/cm2. The as-implanted samples show a decreased Raman intensity of the 520 cm−1 optical mode, and increased Raman intensity between 400 and 500 cm−1 with respect to an unimplanted silicon wafer. The higher arsenic doses show an increase in the second-order transverse acoustic-mode (TA) intensity around 300 cm−1 relative to the secondorder transverse optical-mode (TO) intensity near 970 cm−1. Annealing restores the 2TA/2TO relative intensities and sharpens the weak peaks between 600 and 900 cm−1. The Raman spectrum is altered by the lowest dose implant and the annealing steps do not lead to a complete recovery of the pre-implant Raman spectrum. This permits the monitoring of lowdose ion-implant damage recovery with Raman spectroscopy.

Raman spectroscopy of synthetic, geological and biological vaterite: a Raman spectroscopic study

2009 ◽  
Vol 41 (2) ◽  
pp. 193-201 ◽  
Author(s):  
U. Wehrmeister ◽  
A. L. Soldati ◽  
D. E. Jacob ◽  
T. Häger ◽  
W. Hofmeister
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

scholarly journals Raman spectroscopic analysis of archaeological specimens from the wreck of HMS Swift , 1770

2016 ◽  
Vol 374 (2082) ◽  
pp. 20160053
Author(s):  
Howell G. M. Edwards ◽  
Dolores Elkin ◽  
Marta S. Maier
Keyword(s):  
Raman Spectroscopy ◽  
Eighteenth Century ◽  
Spectroscopic Analysis ◽  
Royal Navy ◽  
Materia Medica ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
First Pass ◽  
Alternative Techniques ◽  
Archaeological Excavations

Specimens from underwater archaeological excavations have rarely been analysed by Raman spectroscopy probably due to the problems associated with the presence of water and the use of alternative techniques. The discovery of the remains of the Royal Navy warship HMS Swift off the coast of Patagonia, South America, which was wrecked in 1770 while undertaking a survey from its base in the Falkland/Malvinas Islands, has afforded the opportunity for a first-pass Raman spectroscopic study of the contents of several glass jars from a wooden chest, some of which had suffered deterioration of their contents owing to leakage through their stoppers. From the Raman spectroscopic data, it was possible to identify organic compounds such as anthraquinone and copal resin, which were empirically used as materia medica in the eighteenth century to treat shipboard diseases; it seems very likely, therefore, that the wooden chest belonged to the barber-surgeon on the ship. Spectra were obtained from the wet and desiccated samples, but several samples from containers that had leaked were found to contain only minerals, such as aragonite and sediment. This article is part of the themed issue ‘Raman spectroscopy in art and archaeology’.

FT-Raman Spectroscopic Study of Decorated Stained Glass

1998 ◽  
Vol 52 (5) ◽  
pp. 679-682 ◽  
Author(s):  
H. G. M. Edwards ◽  
J. K. F. Tait
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
19Th Century ◽  
Potential Application ◽  
Stained Glass ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Two Samples ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

Two samples of decorated stained glass (14th century and 19th century) from Southwell Minster, Nottinghamshire, U.K. have been examined with the use of Fourier transform (FT)-Raman spectroscopy. The pigment used in both cases has been identified as red ochre, and the potential application of FT-Raman spectroscopy to an important area of conservation and restoration of glass artifacts is demonstrated.

scholarly journals Raman spectroscopic study of photosensitive damage to lysozyme structure sensitized by hypocrellin A

2006 ◽  
Vol 20 (5-6) ◽  
pp. 269-273 ◽  
Author(s):  
J. H. Zhou ◽  
X. H. Wu ◽  
S. H. Wei ◽  
X. T. Gu ◽  
Y. Y. Feng ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Main Chain ◽  
Molecular Level ◽  
Active Oxygen ◽  
Laser Raman Spectroscopy ◽  
Side Chain ◽  
Raman Spectroscopic ◽  
Laser Raman ◽  
Raman Spectroscopic Study ◽  
Hypocrellin A

Laser Raman spectroscopy was used to detect the nature of the structural change in lysozyme sensitized by hypocrellin A (HA) at the molecular level. The results indicated that the orderly structure of lysozyme has been damaged by the active oxygen (1O2, O2−·and.OH, etc.) generated by HA, and cause the changes in H-bonds system of the main chain and the side chain of lysozyme.

Kaolinite hydroxyls in dimethylsulphoxide-intercalated kaolinites at 77 K – a Raman spectroscopic study

Clay Minerals ◽  
2000 ◽  
Vol 35 (2) ◽  
pp. 443-454 ◽  
Author(s):  
R. L. Frost ◽  
J. Kristof ◽  
E. Horvath ◽  
J. T. Kloprogge
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Study ◽  
Dmso Molecule ◽  
Molecular Forms ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Surface Hydroxyl Groups ◽  
Inner Surface

AbstractKaolinite hydroxyls in dimethylsulphoxide-intercalated (DMSO-intercalated) kaolinites have been determined using Raman spectroscopy at 298 and 77 K. The inner surface hydroxyl frequencies at 3650, 3670, 3684 and 3693 cm-1 move to higher wavenumbers upon cooling to 77 K and are observed at 3659, 3676, 3692 and 3702 cm-1. The inner hydroxyl frequency is at 3620 cm-1 at 298 K and is at 3615 cm-1 at 77 K. Upon intercalation with DMSO, additional bands are found at 3660, 3536 and 3501 cm-1 for the low-defect kaolinite and at 3664, 3543 and 3509 cm-1 for the high-defect kaolinite at 298 K. The 3660 cm-1 band at 298 K is resolved into two bands at 3658 and 3663 cm-1 at 77 K for the low-defect kaolinite and these bands are assigned to the inner surface hydroxyl groups, hydrogen-bonded to the DMSO molecule. It is proposed that the DMSO molecule exists with two different orientations in the intercalate and these two molecular forms are differentiated by the OH-stretching bands of the inner surface hydroxyl groups. This band for the high-defect kaolinite is found at 3664 cm-1 at 298 K and resolves into two bands at 3664 and 3673 cm-1 at 77 K.

Organic–inorganic interactions of single crystalline organolead halide perovskites studied by Raman spectroscopy

2016 ◽  
Vol 18 (27) ◽  
pp. 18112-18118 ◽  
Author(s):  
Li-Qiang Xie ◽  
Tai-Yang Zhang ◽  
Liang Chen ◽  
Nanjie Guo ◽  
Yu Wang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Study ◽  
Single Crystals ◽  
Single Crystalline ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Halide Perovskites ◽  
Organolead Halide

Perovskite single crystals with varied cations and halides have been grown for Raman spectroscopic study of their organic–inorganic interactions.

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