Ternary solvent for CH3NH3PbI3 perovskite films with uniform domain size

2017 ◽  
Vol 19 (2) ◽  
pp. 1143-1150 ◽  
Author(s):  
Lin Xie ◽  
Heewon Hwang ◽  
Minjung Kim ◽  
Kyungkon Kim
Keyword(s):  
Dimethyl Sulfoxide ◽  
Domain Size ◽  
Solvent System ◽  
Uniform Domain

A ternary solvent system consisting of dimethyl sulfoxide (DMSO), γ-butyrolactone (GBL) and N-methyl-2-pyrrolidone (NMP) has been developed to improve the uniformity of CH3NH3PbI3 (MAPbI3) perovskite domains.

Magnetic Domain Observation on Melt-Spun Nd-Fe-B Ribbons Using Magnetic Force Microscopy

1999 ◽  
Vol 577 ◽  
Author(s):  
A. Gavrin ◽  
C. Sellers ◽  
S.H. Liouw
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Measurements ◽  
Magnetic Domain ◽  
Domain Size ◽  
High Coercivity ◽  
Uniform Domain ◽  
Cross Sectional ◽  
Force Microscopy ◽  
Melt Spun

ABSTRACTWe have used Magnetic Force Microscopy (MFM) to study the magnetic domain structures of melt-spun Nd-Fe-B ribbons. The ribbons are commercial products (Magnequench International, Inc. MQP-B and MQP-B+) with a thickness of approximately 20 microns. These materials have identical composition, Nd12.18B5.36Fe76.99Co5.46, but differ in quenching conditions. In order to study the distribution of domain sizes through the ribbon thickness, we have prepared cross-sectional samples in epoxy mounts. In order to avoid artifacts due to tip-sample interactions, we have used high coercivity CoPt coated MFM tips. Our studies show domain sizes typically ranging from 50-200 nm in diameter. This is in agreement with studies of similar materials in which domains were investigated in the plane of the ribbon. We also find that these products differ substantially in mean domain size and in the uniformity of the domain sizes as measured across the ribbon. While the B+ material shows nearly uniform domain sizes throughout the cross section, the B material shows considerably larger domains on one surface, followed by a region in which the domains are smaller than average. This structure is presumably due to the differing quench conditions. The region of coarse domains varies in thickness, disappearing in some areas, and reaching a maximum thickness of 2.75 µm in others. We also describe bulk magnetic measurements, and suggest that.

scholarly journals HOMOGENEOUS TRIMETHYLSILYLATION OF CELLULOSE IN THE DIMETHYL SULFOXIDE-PARAFORMALDEHYDE SOLVENT SYSTEM

1979 ◽  
Vol 35 (11) ◽  
pp. T466-T478 ◽  
Author(s):  
Nobuo Shiraishi ◽  
Yoshifumi Miyagi ◽  
Shigeko Yamashita ◽  
Tokuo Yokota ◽  
Yoshiyuki Hayashi
Keyword(s):  
Dimethyl Sulfoxide ◽  
Solvent System

scholarly journals Homogeneous grafting of cellulose with polycaprolactone using quaternary ammonium salt systems and its application for ultraviolet-shielding composite films

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 10865-10872 ◽  
Author(s):  
Yongqi Yu ◽  
Xin Gao ◽  
Zeming Jiang ◽  
Wentao Zhang ◽  
Jiwei Ma ◽  
...  
Keyword(s):  
Dimethyl Sulfoxide ◽  
Microcrystalline Cellulose ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Ring Opening ◽  
Composite Films ◽  
Solvent System ◽  
System P ◽  
Ultraviolet Shielding ◽  
Salt Systems

Microcrystalline cellulose graft polycaprolactone (MCC-g-PCL) was successfully synthesized by ring-opening copolymerization catalyzed by 4-dimethylaminopyridine in a dual tetrabutylammonium acetate/dimethyl sulfoxide solvent system.

Reactions in mixed non-aqueous systems containing sulfur dioxide. V. The formation of metal sulfur oxyanion compounds by the electrolytic solution of metals

1983 ◽  
Vol 36 (10) ◽  
pp. 1991 ◽  
Author(s):  
NK Graham ◽  
JB Gill ◽  
DC Goodall
Keyword(s):  
Sulfur Dioxide ◽  
Dimethyl Sulfoxide ◽  
Binary Systems ◽  
Solvent System ◽  
Binary Solvent ◽  
Aqueous Systems ◽  
Electrolytic Solution ◽  
Solvent Parameters

The metals Ti, Zr, V, Cr, Mo, Fe, Ni and Sn dissolve electrolytically in the binary solvent system dimethyl sulfoxide-sulfur dioxide, forming metal disulfates; W forms sulfate. The metals dissolve electrolytically in other binary systems containing sulfur dioxide, forming mixtures of sulfur oxyanions. The importance of solvent parameters in metal reactivity is discussed, together with the mechanism of the reactions.

Solvation of ions. Some applications. V. Electrolytic recovery of silver from non-aqueous solutions

1983 ◽  
Vol 36 (9) ◽  
pp. 1695 ◽  
Author(s):  
S Jayasekera ◽  
J Avraamides ◽  
AJ Parker
Keyword(s):  
Dimethyl Sulfoxide ◽  
Cell Voltage ◽  
Solvent System ◽  
Cathode Current Density ◽  
Electrolysis Cell ◽  
Silver Deposits ◽  
Tafel Slopes ◽  
Solvation Of Ions ◽  
Cathode Current ◽  
A Current

Electrolysis of a dimethyl sulfoxide solution containing AgCl2- and CuCl2- has been shown to produce high-purity, adherent, non-dendritic cathode silver with a current efficiency of over 80%. At the anode, CuCl2- was oxidized to Cu2+. An optimum electrolyte/solvent system was chosen after a study of the various parameters contributing to the conductivity of the solution. Diffusion coefficients and Tafel slopes were measured, as were the various potentials contributing to the cell voltage. Good silver deposits were obtained by using 0.75 M CaCl2.2H2O, 0.5 M AgCl and 0.5 M CuCl in dimethyl sulfoxide at 50�C at a cathode current density of 5 mA cm-2. A practical electrolysis cell is proposed for use with a cyclic leach-electrowin process for recovering pure silver from various high-grade secondary residues.

scholarly journals Synthesis, Experimental and Density Functional Theory (DFT) Studies on Solubility of Camptothecin Derivatives

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3170 ◽  
Author(s):  
Chin-Hung Lai ◽  
Chia-Chin Chang ◽  
Yi-Lin Weng ◽  
Ta-Hsien Chuang
Keyword(s):  
Density Functional Theory ◽  
Water Molecule ◽  
Dimethyl Sulfoxide ◽  
Normal Saline ◽  
Density Functional ◽  
Solvent System ◽  
Aprotic Solvents ◽  
Dft Studies ◽  
Functional Theory ◽  
Solvent Systems

Two camptothecin derivatives, 10-cyclohexyl-7-methyl-20(S)-camptothecin and 7-methyl-10-morpholino-20(S)-camptothecin, were synthesized and their differences in solubility were investigated using four chosen solvent systems. Based on our results, 10-cyclohexyl-7-methyl-20(S)-camptothecin exhibited higher solubilities than 7-methyl-10-morpholino-20(S)-camptothecin in polar aprotic solvents. However, these two camptothecin derivatives did not exhibit apparent differences in solubility between 5% dimethyl sulfoxide (DMSO)/95% normal saline co-solvent system and 5% dimethylacetamide (DMAC)/95% normal saline co-solvent system. To rationalize their differences in solubility, we also tried to perform a DFT-B3LYP study to investigate their interaction with one water molecule.

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