scholarly journals Snapshots of Ce70 Toroid Assembly from Solids and Solution

2021 ◽  
Author(s):  
Ian Colliard ◽  
Jessica C. Brown ◽  
Dylan B. Fast ◽  
Ashleigh Sockwell ◽  
Amy Hixon ◽  
...  
Keyword(s):  
Room Temperature ◽  
X Ray Diffraction ◽  
Modular Assembly ◽  
X Ray ◽  
Energy Applications ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Show Evidence ◽  
Solid Liquid Interface ◽  
Solid Liquid

Crystallization at the solid-liquid interface is difficult to spectroscopically observe and therefore challenging to understand and ultimately control at the molecular level. The Ce70-torroid formulated [CeIV70(OH)36(O)64(SO4)60(H2O)10] 4- , part of a larger emerging family of MIV70- materials (M=Zr, U, Ce), presents such an opportunity. We have elucidated assembly mechanisms by X-ray scattering (small-angle scattering and total scattering) of solutions and solids, as well as crystallizing and identifying fragments of Ce70 by single-crystal X-ray diffraction. Fragments show evidence for templated growth (Ce5, [Ce5(O)3(SO4)12] 10- ) and modular assembly from hexamer (Ce6) building units (Ce13, [Ce13(OH)6(O)12(SO4)14(Η2Ο)14] 6- and Ce62, [Ce62(OH)30(O)58(SO4)58] 14- ). Ce62, an almost complete ring, precipitates instantaneously in the presence of ammonium cations as two torqued arcs that interlock by hydrogen boding through NH4 +, which can also be replaced by other cations, demonstrated with CeIII. Room temperature rapid assembly of both Ce70 and Ce62, respectively, by addition of Li+ and NH4 +, along with ion?exchange and redox behavior, invite exploitation of this emerging material family in environmental and energy applications.

scholarly journals Snapshots of Ce70 Toroid Assembly from Solids and Solution

2021 ◽  
Author(s):  
Ian Colliard ◽  
Jessica C. Brown ◽  
Dylan B. Fast ◽  
Ashleigh Sockwell ◽  
Amy Hixon ◽  
...  
Keyword(s):  
Room Temperature ◽  
X Ray Diffraction ◽  
Modular Assembly ◽  
X Ray ◽  
Energy Applications ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Show Evidence ◽  
Solid Liquid Interface ◽  
Solid Liquid

Crystallization at the solid-liquid interface is difficult to spectroscopically observe and therefore challenging to understand and ultimately control at the molecular level. The Ce70-torroid formulated [CeIV70(OH)36(O)64(SO4)60(H2O)10] 4- , part of a larger emerging family of MIV70- materials (M=Zr, U, Ce), presents such an opportunity. We have elucidated assembly mechanisms by X-ray scattering (small-angle scattering and total scattering) of solutions and solids, as well as crystallizing and identifying fragments of Ce70 by single-crystal X-ray diffraction. Fragments show evidence for templated growth (Ce5, [Ce5(O)3(SO4)12] 10- ) and modular assembly from hexamer (Ce6) building units (Ce13, [Ce13(OH)6(O)12(SO4)14(Η2Ο)14] 6- and Ce62, [Ce62(OH)30(O)58(SO4)58] 14- ). Ce62, an almost complete ring, precipitates instantaneously in the presence of ammonium cations as two torqued arcs that interlock by hydrogen boding through NH4 +, which can also be replaced by other cations, demonstrated with CeIII. Room temperature rapid assembly of both Ce70 and Ce62, respectively, by addition of Li+ and NH4 +, along with ion?exchange and redox behavior, invite exploitation of this emerging material family in environmental and energy applications.

Grazing incidence diffraction of cadmium arachidate multilayers at the solid-liquid interface

2005 ◽  
Vol 220 (12) ◽  
Author(s):  
Chad E. Miller ◽  
Jaroslaw Majewski ◽  
Thomas Gog ◽  
Tonya L. Kuhl
Keyword(s):  
Arachidic Acid ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
X Ray ◽  
Organic Layers ◽  
Grazing Incidence Diffraction ◽  
Synchrotron Beam ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Monochromatic Synchrotron

AbstractUsing complementary X-ray reflectivity (XR) and grazing incidence X-ray diffraction (GIXD), we report structural studies of supported thin-organic layers in contact with water and air. Using a monochromatic synchrotron beam to penetrate 10 mm of liquid, we have characterized buried films composed of 12.5 repeating bilayers of arachidic acid (C

Determination of the cationic distribution in oxidic thin films by resonant X-ray diffraction: the magnetoelectric compound Ga2−xFexO3

2016 ◽  
Vol 49 (4) ◽  
pp. 1308-1314 ◽  
Author(s):  
Christophe Lefevre ◽  
Alexandre Thomasson ◽  
Francois Roulland ◽  
Vincent Favre-Nicolin ◽  
Yves Joly ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Element Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Site Distribution ◽  
X Ray Scattering ◽  
Cationic Distribution ◽  
Cationic Site

The cationic distribution is decisive for both the magnetic and electric properties of complex oxides. While it can be easily determined in bulk materials using classical methods such as X-ray or neutron diffraction, difficulties arise for thin films owing to the relatively small amount of material to probe. It is shown here that a full determination of the cationic site distribution in thin films is possible through an optimized processing of resonant elastic X-ray scattering experiments. The method is illustrated using gallium ferrite Ga2−xFexO3samples which have been the focus of an increasing number of studies this past decade. They indeed represent an alternative to the, to date, only room-temperature magnetoelectric compound BiFeO3. The methodology can be applied to determine the element distribution over the various crystallographic sites in any crystallized system.

Surface X-ray scattering of high index plane of platinum containing kink atoms in solid–liquid interface: Pt(310)=3(100)–(110)

2008 ◽  
Vol 53 (21) ◽  
pp. 6070-6075 ◽  
Author(s):  
Nagahiro Hoshi ◽  
Akira Nakahara ◽  
Masashi Nakamura ◽  
Kazushi Sumitani ◽  
Osami Sakata
Keyword(s):  
Liquid Interface ◽  
High Index ◽  
X Ray ◽  
X Ray Scattering ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
High Index Plane ◽  
Ray Scattering

X-ray diffraction evidence of ordering in a normal liquid near the solid-liquid interface

2000 ◽  
Vol 50 (4) ◽  
pp. 487-493 ◽  
Author(s):  
C.-J Yu ◽  
A. G Richter ◽  
J Kmetko ◽  
A Datta ◽  
P Dutta
Keyword(s):  
Liquid Interface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Normal Liquid ◽  
Solid Liquid Interface ◽  
Solid Liquid

Exploring the Use of a Synchrotron X-Ray Scattering Method to Investigate Nucleation

2013 ◽  
Vol 765 ◽  
pp. 102-106 ◽  
Author(s):  
Adam Brown ◽  
Hong Biao Dong ◽  
Paul Howes ◽  
Chris Nicklin
Keyword(s):  
Liquid Interface ◽  
Scattering Method ◽  
X Ray ◽  
Solidification Behaviour ◽  
X Ray Scattering ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Melting And Solidification ◽  
Ray Scattering

A synchrotron X-Ray scattering method has been explored to probe the interactions at the interface between liquid Al and α-Al2O3. Melting and solidification behaviour has been observed in-situ in Al via collection and indexing of scattering generated at the solid-liquid interface.

scholarly journals Pressure-dependent X-ray diffraction of the multiferroics RMn2O5

2019 ◽  
Vol 75 (4) ◽  
pp. 687-696 ◽  
Author(s):  
Wei Peng ◽  
Victor Balédent ◽  
Marie-Bernadette Lepetit ◽  
Antoine Vaunat ◽  
Elisa Rebolini ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Density Functional ◽  
Room Temperature ◽  
Exchange Interactions ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
X Ray ◽  
X Ray Scattering ◽  
Pressure Evolution ◽  
Good Agreement

The room-temperature structural properties of the RMn2O5 multiferroics have been investigated under pressure, using powder X-ray scattering and density functional theory (DFT) calculations. It was possible to determine the lattice parameters and the main atomic positions as a function of pressure. Good agreement was observed between the X-ray and DFT results for most of the determined crystallographic data. From the DFT calculations, it was possible to infer the pressure evolution of the exchange interactions, and this analysis led to the conclusion that the onset of the q = (½, 0, ½) magnetic structure under pressure is related to the increase in the J 1 super-exchange terms (due to the reduction in the Mn—O distances) compared with the Mn—R exchange interactions. In addition, the 1D antiferromagnetic character of the compounds should be reinforced under pressure.

Preparation and Structure of Cu-W Multilayers

1988 ◽  
Vol 132 ◽  
Author(s):  
K. M. Unruh ◽  
B. M. Patterson ◽  
S. I. Shah ◽  
G. A. Jones ◽  
Y.-W. Kim ◽  
...  
Keyword(s):  
Room Temperature ◽  
Melting Behavior ◽  
High Angle ◽  
X Ray Diffraction ◽  
Individual Layer ◽  
X Ray ◽  
Transmission Electron ◽  
Angle Scattering ◽  
Interesting Candidate ◽  
Xrd And Tem

ABSTRACTSputtered multilayer samples of W and Cu have been prepared on a variety of substrates with nominal individual layer thicknesses ranging from about 5 to about 100 A. High angle X-Ray Diffraction (XRD) data have been obtained at room temperature on all of these samples. In addition, selected samples have been studied by Transmission Electron Microscopy (TEM) and by low and high angle XRD from room temperature to above the melting point of bulk Cu. XRD and TEM data indicate that the as-deposited multilayer samples are comprised of well-defined individual layers due, in part, to the very small mutual solubility of W and Cu. At high temperatures the existence of low angle scattering peaks as well as satellites about Bragg peaks indicates that the layered structure is not lost. As a result, the W-Cu multilayer system seems to be an interesting candidate for the study of the melting behavior of thin Cu layers.

Water Assisted Conversion of ZnO from Metallic Zinc Particles

2013 ◽  
Vol 538 ◽  
pp. 38-41
Author(s):  
Qing Lan Ma ◽  
Rui Xiong ◽  
Bao Gai Zhai ◽  
Yuan Ming Huang
Keyword(s):  
Room Temperature ◽  
Green Emission ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
Xrd Pattern ◽  
X Ray ◽  
Uv Emission ◽  
Liquid Reaction ◽  
Sem Study ◽  
Solid Liquid

Zinc oxide (ZnO) was synthesized by solid-liquid reaction of raw Zn particles in water. The synthesized ZnO were characterized with X-ray diffraction (XRD), scanning electronic microscopy (SEM) and photoluminescence (PL) spectrophotometer. The XRD pattern confirmed that the formation of ZnO with wurtzite structure and ZnOOH crystals. The SEM study clearly exhibited a honeycomb-shaped structure of the Zn/ZnO/ZnOOH composites. Room-temperature PL spectra have been observed a very weak UV emission at 376 nm and a very strong yellow-green emission at 538 nm. Furthermore, a possible mechanism of the water-assisted conversion of ZnO from metallic Zn particles was discussed.

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