ChemInform Abstract: Lithiation-Driven Structural Transition of VO2F into Disordered Rock-Salt LixVO2F.

ChemInform ◽  
2016 ◽  
Vol 47 (39) ◽  
Author(s):  
Ruiyong Chen ◽  
Emad Maawad ◽  
Michael Knapp ◽  
Shuhua Ren ◽  
Premysl Beran ◽  
...  
Keyword(s):  
Rock Salt ◽  
Structural Transition

scholarly journals Phonon-based partition of (ZnSe-like) semiconductor mixed crystals on approach to their pressure-induced structural transition

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
M. B. Shoker ◽  
Olivier Pagès ◽  
V. J. B. Torres ◽  
A. Polian ◽  
J.-P. Itié ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Rock Salt ◽  
Special Interest ◽  
Structural Transition ◽  
Mixed Crystals ◽  
Exceptional Point ◽  
Raman Signal ◽  
Macroscopic Scale ◽  
Short Bond ◽  
Cubic Structure

AbstractThe generic 1-bond → 2-mode “percolation-type” Raman signal inherent to the short bond of common A1−xBxC semiconductor mixed crystals with zincblende (cubic) structure is exploited as a sensitive “mesoscope” to explore how various ZnSe-based systems engage their pressure-induced structural transition (to rock-salt) at the sub-macroscopic scale—with a focus on Zn1−xCdxSe. The Raman doublet, that distinguishes between the AC- and BC-like environments of the short bond, is reactive to pressure: either it closes (Zn1−xBexSe, ZnSe1−xSx) or it opens (Zn1−xCdxSe), depending on the hardening rates of the two environments under pressure. A partition of II–VI and III–V mixed crystals is accordingly outlined. Of special interest is the “closure” case, in which the system resonantly stabilizes ante transition at its “exceptional point” corresponding to a virtual decoupling, by overdamping, of the two oscillators forming the Raman doublet. At this limit, the chain-connected bonds of the short species (taken as the minor one) freeze along the chain into a rigid backbone. This reveals a capacity behind alloying to reduce the thermal conductivity as well as the thermalization rate of photo-generated electrons.

scholarly journals Lithiation-driven structural transition of VO2F into disordered rock-salt LixVO2F

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65112-65118 ◽  
Author(s):  
Ruiyong Chen ◽  
Emad Maawad ◽  
Michael Knapp ◽  
Shuhua Ren ◽  
Přemysl Beran ◽  
...  
Keyword(s):  
Cathode Material ◽  
Rock Salt ◽  
Structural Transition ◽  
Electrochemical Lithiation ◽  
Li Batteries

Disordered rock-salt LixVO2F formed through electrochemical lithiation exhibits promising performance when evaluated as a cathode material for Li batteries.

scholarly journals Mott Switching and Structural Transition in the Metal Phase of VO2 Nanodomain

2021 ◽  
Vol 3 (2) ◽  
pp. 605-610
Author(s):  
Chang-Yong Kim ◽  
Tetiana Slusar ◽  
Jinchul Cho ◽  
Hyun-Tak Kim
Keyword(s):  
Structural Transition ◽  
Metal Phase

scholarly journals Exploring the Use of Polyols, Corn, and Beet Juice for Decreasing the Freezing Point of Brine Solution for Deicing of Pavements

2021 ◽  
Vol 13 (11) ◽  
pp. 5765
Author(s):  
Tauqeer Abbas ◽  
Dayakar Naik Lavadiya ◽  
Ravi Kiran
Keyword(s):  
Rock Salt ◽  
Freezing Point ◽  
Salt Content ◽  
Agricultural Products ◽  
Soluble Solids ◽  
Brine Solution ◽  
Local Municipalities ◽  
State And Local ◽  
Brix Value ◽  
Geographical Locations

Deicing of pavements is essential to ensure safe and timely movement of traffic in geographical locations where snow and ice events are anticipated. State and local municipalities employ brine solution with 23.3 wt% sodium chloride (NaCl) available in the form of rock salt to deice the pavements. Unlike water, the brine solution does not freeze until the temperature falls below −21.0 °C, i.e., the freezing point of water is depressed by −21.0 °C with the addition of 23.3 wt% NaCl. The depressed freezing point of the brine solution plays a key role in deicing pavements. Unfortunately, a further increase in rock salt content does not lower the freezing point of the brine solution. In this study, different combinations of agricultural products such as polyols including sorbitol, maltitol, and mannitol in brine (23.3 wt% of NaCl in water), and NaCl-juice (corn and beet juice) were investigated to achieve freezing point depressions below −21.0 °C for potential deicing applications in extremely cold areas. Different weight fractions of polyols-brine solutions ranging from 7.14% to 27.77% were considered, and corresponding freezing points were determined. While the sorbitol-brine solution exhibited the lowest freezing point of −38.1 °C at a higher concentration, the maltitol-brine solution exhibited a freezing point of −35.6 °C at the same concentration. Based on the °Brix value, beet juice had almost three times more soluble solids and a lower freezing point compared to corn juice. Adding 23.3 wt% of NaCl in 70% corn juice lowered the freezing point up to −23.5 °C.

scholarly journals Infrared phonon spectroscopy on the Cairo pentagonal antiferromagnet Bi2Fe4O9 : A study through the pressure-induced structural transition

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
M. Verseils ◽  
A. P. Litvinchuk ◽  
J-B. Brubach ◽  
P. Roy ◽  
K. Beauvois ◽  
...  
Keyword(s):  
Structural Transition
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