Fabrication of new structures from a 3D cobalt phosphonate network: structural transformation and proton conductivity investigation

Maximized Proton Conductivity of the HPF6 Clathrate Hydrate by Structural Transformation

The Journal of Physical Chemistry C ◽

10.1021/jp805510g ◽

2008 ◽

Vol 112 (35) ◽

pp. 13332-13335 ◽

Cited By ~ 15

Author(s):

Jong-Ho Cha ◽

Kyuchul Shin ◽

Sukjeong Choi ◽

Sangyong Lee ◽

Huen Lee

Keyword(s):

Proton Conductivity ◽

Structural Transformation ◽

Clathrate Hydrate

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Tuning the dynamic magnetic behaviour and proton conductivity via water-induced structural transformation of neutral-to-cationic dysprosium layer

Journal of Materials Chemistry C ◽

10.1039/d1tc03920b ◽

2021 ◽

Author(s):

Hao-Ling Sun ◽

Xiao-Qin Ji ◽

Rong Sun ◽

Jin Xiong ◽

Song Gao

Keyword(s):

Fuel Cell ◽

Proton Conductivity ◽

Structural Transformation ◽

Potential Application ◽

Magnetic Behaviour ◽

Information Storage ◽

Scientific Interest ◽

External Stimuli

Employing external stimuli to manipulate the synergy between magnetic and proton conductivity has stimulated extensive scientific interest due to the potential application in information storage, sensors and fuel cell, etc....

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Purely inorganic frameworks based on polyoxometalate clusters with abundant phosphate groups: single-crystal to single-crystal structural transformation and remarkable proton conduction

Chemical Communications ◽

10.1039/c9cc08696j ◽

2020 ◽

Vol 56 (3) ◽

pp. 391-394 ◽

Cited By ~ 8

Author(s):

Shan Zhang ◽

Ying Lu ◽

Xiu-Wei Sun ◽

Zhuo Li ◽

Tian-Yi Dang ◽

...

Keyword(s):

Single Crystal ◽

Proton Conductivity ◽

Structural Transformation ◽

Proton Conduction ◽

High Proton Conductivity ◽

High Proton ◽

Crystal Structural ◽

Inorganic Framework ◽

Phosphate Groups ◽

New Framework

A pure-inorganic framework 1 underwent a SCSC transformation to form a new framework 1′, which has high proton conductivity.

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Significant Proton Conductivity Enhancement through Rapid Water-Induced Structural Transformation from a Cationic Framework to a Water-Rich Neutral Chain

Crystal Growth & Design ◽

10.1021/acs.cgd.7b00469 ◽

2017 ◽

Vol 17 (7) ◽

pp. 3847-3853 ◽

Cited By ~ 12

Author(s):

Zhuanling Bai ◽

Yanlong Wang ◽

Wei Liu ◽

Yuxiang Li ◽

Jian Xie ◽

...

Keyword(s):

Proton Conductivity ◽

Structural Transformation ◽

Conductivity Enhancement ◽

Cationic Framework ◽

Significant Proton

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The structure of pre-mRNA and mRNA from erythroid cells

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100082030 ◽

1978 ◽

Vol 36 (2) ◽

pp. 234-235

Author(s):

A.-M. Ladhoff ◽

B.J. Thiele ◽

Ch. Coutelle ◽

S. Rosenthal

Keyword(s):

Bone Marrow ◽

Structural Transformation ◽

Electron Micrographs ◽

Ammonium Acetate ◽

Bone Marrow Cells ◽

Erythroid Cells ◽

Globin Mrna ◽

Ordered Structures ◽

Rabbit Bone ◽

Rabbit Reticulocytes

The suggested precursor-product relationship between the nuclear pre-mRNA and the cytoplasmic mRNA has created increased interest also in the structure of these RNA species. Previously we have been published electron micrographs of individual pre-mRNA molecules from erythroid cells. An intersting observation was the appearance of a contour, probably corresponding to higher ordered structures, on one end of 10 % of the pre-mRNA molecules from erythroid rabbit bone marrow cells (Fig. 1A). A virtual similar contour was observed in molecules of 9S globin mRNA from rabbit reticulocytes (Fig. 1B). A structural transformation in a linear contour occurs if the RNA is heated for 10 min to 90°C in the presence of 80 % formamide. This structural transformation is reversible when the denatured RNA is precipitated and redissolved in 0.2 M ammonium acetate.

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Crystal chemistry of high-Tc superconductors

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100178720 ◽

1990 ◽

Vol 48 (4) ◽

pp. 1118-1119

Author(s):

Maryvonne Hervieu

Keyword(s):

Oxygen Deficiency ◽

Large Family ◽

Copper Oxides ◽

High Tc Superconductors ◽

High Tc ◽

Single Mechanism ◽

Square Planar ◽

History Of ◽

Bismuth Cuprates ◽

New Compounds

Four years after the discovery of superconductivity at high temperature in the Ba-La-Cu-O system, more than thirty new compounds have been synthesized, which can be classified in six series of copper oxides: La2CuO4 - type oxides, bismuth cuprates, YBa2Cu3O7 family, thallium cuprates, lead cuprates and Nd2CuO4 - type oxides. Despite their quite different specific natures, close relationships allow their structures to be simply described through a single mechanism. The fifth first families can indeed be described as intergrowths of multiple oxygen deficient perovskite slabs with multiple rock salt-type slabs, according to the representation [ACuO3-x]m [AO]n.The n and m values are integer in the parent structures, n varying from 0 to 3 and m from 1 to 4; every member of this large family can thus be symbolized by [m,n]. The oxygen deficient character of the perovskite slabs involves the existence or the co-existence of several types of copper environment: octahedral, pyramidal and square planar.Both mechanisms, oxygen deficiency and intergrowth, are well known to give rise easily to nonstoichiometry phenomena. Numerous and various phenomena have actually been characterized in these cuprates, strongly depending on the thermal history of the samples.

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Structural Transformation of a Germanium Σ=13 (510) [001] Tilt Grain Boundary under the Electron Beam

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100179014 ◽

1990 ◽

Vol 48 (1) ◽

pp. 52-53 ◽

Cited By ~ 1

Author(s):

Jean-Luc Rouvière ◽

Alain Bourret

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

Grain Boundary ◽

Structural Transformation ◽

Mirror Symmetry ◽

High Resolution Electron Microscopy ◽

Structural Transformations ◽

Covalent Bonds ◽

Resolution Electron ◽

Tilt Grain Boundary

The possible structural transformations during the sample preparations and the sample observations are important issues in electron microscopy. Several publications of High Resolution Electron Microscopy (HREM) have reported that structural transformations and evaporation of the thin parts of a specimen could happen in the microscope. Diffusion and preferential etchings could also occur during the sample preparation.Here we report a structural transformation of a germanium Σ=13 (510) [001] tilt grain boundary that occurred in a medium-voltage electron microscopy (JEOL 400KV).Among the different (001) tilt grain boundaries whose atomic structures were entirely determined by High Resolution Electron Microscopy (Σ = 5(310), Σ = 13 (320), Σ = 13 (510), Σ = 65 (1130), Σ = 25 (710) and Σ = 41 (910), the Σ = 13 (510) interface is the most interesting. It exhibits two kinds of structures. One of them, the M-structure, has tetracoordinated covalent bonds and is periodic (fig. 1). The other, the U-structure, is also tetracoordinated but is not strictly periodic (fig. 2). It is composed of a periodically repeated constant part that separates variable cores where some atoms can have several stable positions. The M-structure has a mirror glide symmetry. At Scherzer defocus, its HREM images have characteristic groups of three big white dots that are distributed on alternatively facing right and left arcs (fig. 1). The (001) projection of the U-structure has an apparent mirror symmetry, the portions of good coincidence zones (“perfect crystal structure”) regularly separate the variable cores regions (fig. 2).

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