Direct evidence for two-dimensional oxide-ion diffusion in the hexagonal perovskite-related oxide Ba3MoNbO8.5−δ

2019 ◽  
Vol 7 (23) ◽  
pp. 13910-13916 ◽  
Author(s):  
Masatomo Yashima ◽  
Takafumi Tsujiguchi ◽  
Kotaro Fujii ◽  
Eiki Niwa ◽  
Shunta Nishioka ◽  
...  
Keyword(s):  
Direct Evidence ◽  
Two Dimensional ◽  
Ion Diffusion ◽  
Diffusion Paths ◽  
Oxide Ion

Experimentally visualized two-dimensional O2−–O2–O3– diffusion paths rotating around Ba cations in oxygen deficient Ba3MoNbO8.5−δat 1100 °C.

Recent advances and perspectives of two-dimensional Ti-based electrodes for electrochemical energy storage

2021 ◽  
Author(s):  
Lei Mao ◽  
Xun Zhao ◽  
Qihui Cheng ◽  
Guiyuan Yang ◽  
Fangfang Liao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Low Cost ◽  
Small Strain ◽  
Electrochemical Energy Storage ◽  
Two Dimensional ◽  
Ion Diffusion ◽  
Recent Advances ◽  
Diffusion Paths ◽  
Electrochemical Energy

Two-dimensional (2D) titanium (Ti)-based nanomaterials have been extensively investigated due to their small strain expansion, abundant ion diffusion paths, high safety, and low cost. Nonetheless, such Ti-based nanosheets typically exhibit...

scholarly journals Experimental visualization of oxide-ion diffusion paths in pyrochlore-type Yb2Ti2O7

2018 ◽  
Vol 126 (5) ◽  
pp. 341-345 ◽  
Author(s):  
Wataru UNO ◽  
Kotaro FUJII ◽  
Eiki NIWA ◽  
Shuki TORII ◽  
Ping MIAO ◽  
...  
Keyword(s):  
Ion Diffusion ◽  
Pyrochlore Type ◽  
Diffusion Paths ◽  
Oxide Ion

scholarly journals Preferred ion diffusion pathways and activation energies for Ag in the crystal structure of stephanite, Ag5SbS4

2009 ◽  
Vol 73 (1) ◽  
pp. 17-26 ◽  
Author(s):  
M. Leitl ◽  
A. Pfitzner ◽  
L. Bindi
Keyword(s):  
Crystal Structure ◽  
Electron Density ◽  
Structural Model ◽  
Careful Analysis ◽  
Type Locality ◽  
Two Dimensional ◽  
Ionic Conductors ◽  
Ion Diffusion ◽  
Unit Cell Parameters ◽  
Cell Parameters

The crystal structure of stephanite fromthe type locality, Freiberg District, Saxony, Germany, was refined in the space group Cmc21, up to a final R index of 0.0427. Unit-cell parameters are: a 7.8329(6) Å, b 12.458(1) Å, c 8.5272(7) Å, V 832.1(1) Å3; Z = 4. The previously reported structural model is confirmed, but a higher-precision refinement was achieved herein by the introduction of thirdorder non-harmonic Gram-Charlier tensors for one Ag atom. In the structure of stephanite, Sb forms isolated SbS3 pyramids, which typically occur in sulphosalts, and Ag occupies sites with coordination ranging fromtriangular to almost tetrahedral. Both the Sb–S and Ag–S bond distances closely match the values commonly observed in the structures of other Ag sulphosalts and sulphides.The use of non-harmonic parameters for Ag allowed a better description of the electron density related to Ag, which is usually difficult to refine in good ionic conductors. A careful analysis of the energy barriers between the Ag sites defines preferred ion-diffusion pathways within the crystal structure of stephanite. The diffusion of Ag ions occurs preferentially along the sites Ag1 and Ag2, giving rise to two-dimensional nets of Ag atoms in which the ion conduction probably takes place.

Role of divalent cation (Ba) substitution in the Li+ ion conductor LiTi2(PO4)3: a molecular dynamics study

2020 ◽  
Vol 22 (26) ◽  
pp. 14471-14479
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Supriya Roy
Keyword(s):  
Molecular Dynamics ◽  
Divalent Cation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Ion Diffusion ◽  
Ion Conductor ◽  
Li Ion ◽  
Ba Substitution

Influence of Ba2+ ordering on cationic diffusion: (a) three-dimensional low Li+ ion diffusion using randomly substituted Ba2+, and (b) two-dimensional layered type high Li+ ion diffusion using specifically ordered substitution of Ba2+.

scholarly journals Effects of redox processes on oxide ion diffusion in Mg-Al-Fe-O solid solution single crystals.

1999 ◽  
Vol 46 (1) ◽  
pp. 36-47
Author(s):  
Hajime Haneda ◽  
Mitsumasa Isobe ◽  
Takamasa Ishigaki ◽  
Isao Sakaguchi ◽  
Noboru Ichinose
Keyword(s):  
Solid Solution ◽  
Single Crystals ◽  
Redox Processes ◽  
Ion Diffusion ◽  
Oxide Ion

Molecular analysis of intermediate filament cytoskeleton--a putative load-bearing structure

1984 ◽  
Vol 246 (4) ◽  
pp. H566-H572 ◽  
Author(s):  
M. G. Price
Keyword(s):  
Skeletal Muscle ◽  
Molecular Analysis ◽  
Intermediate Filaments ◽  
Intermediate Filament ◽  
Direct Evidence ◽  
Two Dimensional ◽  
Myocardial Cells ◽  
Intermediate Filament Proteins ◽  
Bovine Myocardium ◽  
Bearing Structure

Myocardial cells contain a cytoskeleton of intermediate filaments connecting the myofibrils. The present molecular analysis of the myocardial cytoskeleton was designed to identify the intermediate filament proteins and examine their assembly properties. The intermediate filament proteins desmin and vimentin were isolated from adult bovine myocardium by sequential extraction, urea solubilization, and chromatography on hydroxylapatite and DEAE columns. Desmin was obtained virtually pure in one peak and in a mixture of desmin and vimentin in the trailing fractions. Intermediate filaments of different morphologies polymerized in the desmin and the desmin-vimentin fractions. Isolated myocardial desmin occurs as three isozymes and isolated myocardial vimentin as two isozymes, which co-migrate on two-dimensional gels with corresponding isozymes from bovine skeletal and smooth muscle. Polypeptides of 200,000 and 220,000 daltons that fractionate with myocardial desmin and vimentin are also present in cytoskeletons of smooth and skeletal muscle. The results provide direct evidence that myocardial desmin can assemble to form intermediate filaments, suggesting that desmin is the major component of the cytoskeletal filaments in cardiomyocytes.

scholarly journals Proline isomerism leads to multiple folded conformations of calbindin D9k: direct evidence from two-dimensional 1H NMR spectroscopy.

1989 ◽  
Vol 86 (7) ◽  
pp. 2195-2198 ◽  
Author(s):  
W. J. Chazin ◽  
J. Kordel ◽  
T. Drakenberg ◽  
E. Thulin ◽  
P. Brodin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Direct Evidence ◽  
Two Dimensional ◽  
Calbindin D9k
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