High pressure studies of the transport properties of ionic liquids

2012 ◽  
Vol 154 ◽  
pp. 425-438 ◽  
Author(s):  
Kenneth R. Harris ◽  
Mitsuhiro Kanakubo
Keyword(s):  
High Pressure ◽  
Ionic Liquids ◽  
Transport Properties ◽  
High Pressure Studies

Comparative Studies on Synthesis of Imidazole Ionic Liquids and Their Solubility for Wood by Microwave

2010 ◽  
Vol 113-116 ◽  
pp. 1744-1748 ◽  
Author(s):  
Li Ying Guo ◽  
Mu Zhang
Keyword(s):  
High Pressure ◽  
Ionic Liquids ◽  
Mass Fraction ◽  
Wood Fiber ◽  
Hydroxyl Group ◽  
Wood Powder ◽  
Chemical Structures ◽  
High Pressure Studies ◽  
Before And After ◽  
Temperature And Pressure

The present work deals with the synthesis of various imidazole ionic liquids [BMIM]Cl, [AMIM]Cl, [AEIM]Cl, [HeEIM]Cl and [HeVIM]Cl, the chemical structures of ionic liquids by FTIR and 1HNMR, the pretreatment of wood powder as extracted with a mixture of benzene/ethanol or activated with 25% (mass fraction) NaOH under normal temperature and pressure, microwave and high pressure, studies the solubility of ionic liquids on the wood powder by microwave (90°C, 400w), and analyses the microstructure of the wood before and after dissolution as measured by SEM. The result shows that all the ionic liquids can dissolve the wood fiber directly, ionic liquids containing hydroxyl group exhibit better solubility. Wood powder pretreated with 25% NaOH under high pressure has the lowest crystallinity (2.4%) and the highest dissolution rate. The solubility of [HeVIM]Cl is the best, which approach to 21.6%.

scholarly journals How is charge transport different in ionic liquids? The effect of high pressure

2017 ◽  
Vol 19 (21) ◽  
pp. 14141-14147 ◽  
Author(s):  
Z. Wojnarowska ◽  
E. Thoms ◽  
B. Blanchard ◽  
S. N. Tripathy ◽  
P. Goodrich ◽  
...  
Keyword(s):  
High Pressure ◽  
Ionic Liquids ◽  
Charge Transport ◽  
Transport Properties ◽  
Activation Volume

In this paper the key role of the apparent activation volume parameter in the charge transport properties of protic and aprotic ionic liquids is demonstrated.

High Pressure Studies of Quantum Well Emission and Deep Emission in GaInP(ordered)-GaAs Heterostructures

1997 ◽  
Vol 499 ◽  
Author(s):  
S. H. Kwok ◽  
P. Y. Yu ◽  
K. Uchida ◽  
T. Arai
Keyword(s):  
High Pressure ◽  
Quantum Well ◽  
Emission Band ◽  
Excitation Power ◽  
High Excitation ◽  
High Pressure Studies ◽  
Band Alignments ◽  
High Pressure Study

ABSTRACTWe report on a high pressure study of emission from a series of GaInP(ordered)/GaAs heterostructures. A so-called “deep emission” band at 1.46 eV is observed in all our samples. At high excitation power, quantum well emission emerges in only one structure where thin GaP layers are inserted on both sides of the GaAs well. From the pressure dependent emission in this sample we have determined its band alignments. The role of the GaP layers in suppressing the deep emission is elucidated.

scholarly journals Pressure-Induced Structural Phase Transition and Metallization in Ga2Se3 up to 40.2 GPa under Non-Hydrostatic and Hydrostatic Environments

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 746
Author(s):  
Meiling Hong ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Xinyu Zhang
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transformation ◽  
Transport Properties ◽  
Electrical Transport ◽  
Structural Phase ◽  
Structure Evolution ◽  
Systematic Research ◽  
Electrical Transport Properties

A series of investigations on the structural, vibrational, and electrical transport characterizations for Ga2Se3 were conducted up to 40.2 GPa under different hydrostatic environments by virtue of Raman scattering, electrical conductivity, high-resolution transmission electron microscopy, and atomic force microscopy. Upon compression, Ga2Se3 underwent a phase transformation from the zinc-blende to NaCl-type structure at 10.6 GPa under non-hydrostatic conditions, which was manifested by the disappearance of an A mode and the noticeable discontinuities in the pressure-dependent Raman full width at half maximum (FWHMs) and electrical conductivity. Further increasing the pressure to 18.8 GPa, the semiconductor-to-metal phase transition occurred in Ga2Se3, which was evidenced by the high-pressure variable-temperature electrical conductivity measurements. However, the higher structural transition pressure point of 13.2 GPa was detected for Ga2Se3 under hydrostatic conditions, which was possibly related to the protective influence of the pressure medium. Upon decompression, the phase transformation and metallization were found to be reversible but existed in the large pressure hysteresis effect under different hydrostatic environments. Systematic research on the high-pressure structural and electrical transport properties for Ga2Se3 would be helpful to further explore the crystal structure evolution and electrical transport properties for other A2B3-type compounds.

High-pressure transport properties of cadmium and zinc Arsenides

2014 ◽  
Vol 50 (9) ◽  
pp. 861-867
Author(s):  
A. Yu. Mollaev ◽  
L. A. Saipulaeva ◽  
R. K. Arslanov ◽  
A. N. Babushkin
Keyword(s):  
High Pressure ◽  
Transport Properties ◽  
Pressure Transport

Development of a robust soft-SAFT model for protic ionic liquids using new high-pressure density data

2021 ◽  
pp. 113036
Author(s):  
Emanuel A. Crespo ◽  
Liliana P. Silva ◽  
Cristina I.P. Correia ◽  
Mónia A.R. Martins ◽  
Ramesh L. Gardas ◽  
...  
Keyword(s):  
High Pressure ◽  
Ionic Liquids ◽  
Protic Ionic Liquids ◽  
Density Data
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