Low-frequency Raman spectra of a glass-forming ionic liquid at low temperature and high pressure

2019 ◽  
Vol 150 (16) ◽  
pp. 164502 ◽  
Author(s):  
Thamires A. Lima ◽  
Mauro C. C. Ribeiro
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Low Temperature ◽  
Raman Spectra ◽  
Low Frequency ◽  
Glass Forming

A comparison of the far-infrared and low-frequency Raman spectra of glass-forming liquids

1999 ◽  
Vol 479 (2-3) ◽  
pp. 111-122 ◽  
Author(s):  
T.S Perova ◽  
J.K Vij ◽  
D.H Christensen ◽  
O.F Nielsen
Keyword(s):  
Raman Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
Glass Forming

scholarly journals Raman Scattering in Cuprate Superconductors

1997 ◽  
Vol 11 (18) ◽  
pp. 2093-2118 ◽  
Author(s):  
Thomas Peter Devereaux ◽  
Arno Paul Kampf
Keyword(s):  
Low Temperature ◽  
Raman Scattering ◽  
Raman Spectra ◽  
Cuprate Superconductors ◽  
Energy Gap ◽  
Low Frequency ◽  
Temperature Behavior ◽  
Doping Dependence ◽  
Electronic Raman Scattering ◽  
Effects Of Disorder

A theory for electronic Raman scattering in the cuprate superconductors is presented with a specific emphasis on the polarization dependence of the spectra which can infer the symmetry of the energy gap. Signatures of the effects of disorder on the low frequency and low temperature behavior of the Raman spectra for different symmetry channels provide detailed information about the magnitude and the phase of the energy gap. Properties of the theory for finite T will be discussed and compared to recent data concerning the doping dependence of the Raman spectra in cuprate superconductors, and remaining questions will be addressed.

Low-temperature and high-pressure phases of a room-temperature ionic liquid and polyiodides: 1-methyl-3-propylimidazolium iodide

2018 ◽  
Vol 206 ◽  
pp. 49-60 ◽  
Author(s):  
Hiroshi Abe ◽  
Hiroaki Kishimura ◽  
Mayumi Takaku ◽  
Mai Watanabe ◽  
Nozomu Hamaya
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Low Temperature ◽  
Amorphous Phase ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Experimental Results

Experimental results are summarized on the P–T–m diagram. In pure [C3mim][I], amorphous phase appeared both at low-temperature and high-pressure. Stoichiometric [C3mim][I3] promotes crystallization, while non-stoichiometric [C3mim][I3.66] indicates anomalies.

scholarly journals Low-temperature and high-pressure polymorphism in a room-temperature ionic liquid

2012 ◽  
Vol 68 (a1) ◽  
pp. s219-s219
Author(s):  
S. Saouane ◽  
S. E. Norman ◽  
T. G. A. Youngs ◽  
C. Hardacre ◽  
F. P. A. Fabbiani
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Low Temperature ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid

Bromine Doped Single-walled Carbon Nanotubes

2000 ◽  
Vol 633 ◽  
Author(s):  
Bingbing Liu ◽  
Jan Carlsten ◽  
Bertil Sundqvist
Keyword(s):  
Carbon Nanotubes ◽  
High Pressure ◽  
Excitation Energy ◽  
Raman Spectra ◽  
High Intensity ◽  
Low Frequency ◽  
Single Walled Carbon Nanotubes ◽  
Frequency Range ◽  
Excitation Energies ◽  
Walled Carbon Nanotubes

AbstractRaman spectra for three SWNT samples doped with Br2 were studied using different excitation energies, 2.41 eV and 1.58 eV. One sample was also studied under high pressure up to 2 GPa. The vibrations in the low frequency range behave similarly for all samples. With an excitation energy of 1.58 eV, additional peaks at ca 240 cm−1 and 209 cm−1 are observed. With increasing pressure, the peak at 209 cm−1 gradually softens by 2∼3 cm−1 and becomes very weak at 1.7 GPa, while a new broader peak at ca 250 cm−1 remains constant up to 2 GPa. A number of high intensity overtone modes are observed under high pressure. These results indicate that the vibrations are attributed to bromine, not to the breathing modes of SWNTs, and that bromine resides in the bundles, possibly also inside tubes as a form of polymer.

Low-Temperature Hydrogenation of Mg-Ni-Nb2O5 Alloy Processed by High-Pressure Torsion

2021 ◽  
pp. 160309
Author(s):  
M. Osorio-García ◽  
K. Suárez-Alcántara ◽  
Y. Todaka ◽  
A. Tejeda-Ochoa ◽  
M. Herrera Ramírez ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
High Pressure Torsion

Nitroethane at high density: an experimental and computational vibrational study

2021 ◽  
Vol 23 (15) ◽  
pp. 9325-9336
Author(s):  
Akio Yoshinaka ◽  
Serge Desgreniers ◽  
Anguang Hu
Keyword(s):  
High Pressure ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Unit Cell ◽  
High Density ◽  
Monoclinic Unit Cell ◽  
Vibrational Study

Raman and IR vibrational spectra confirm two molecular units associated with the monoclinic unit cell of nitroethane under high pressure. Raman spectra are extremely sensitive to predicted effects of unit cell distortion due to changes in H-bonding.

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