scholarly journals Coherent diffraction imaging of nanoscale strain evolution in a single crystal under high pressure

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Wenge Yang ◽  
Xiaojing Huang ◽  
Ross Harder ◽  
Jesse N. Clark ◽  
Ian K. Robinson ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Strain Evolution ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

Electrochemically Induced Strain Evolution in Pt–Ni Alloy Nanoparticles Observed by Bragg Coherent Diffraction Imaging

Nano Letters ◽  
2021 ◽  
Author(s):  
Tomoya Kawaguchi ◽  
Vladimir Komanicky ◽  
Vitalii Latyshev ◽  
Wonsuk Cha ◽  
Evan R. Maxey ◽  
...  
Keyword(s):  
Alloy Nanoparticles ◽  
Strain Evolution ◽  
Coherent Diffraction Imaging ◽  
Ni Alloy ◽  
Diffraction Imaging

scholarly journals A high-pressure cryocooling method for protein crystals and biological samples with reduced background X-ray scatter

2012 ◽  
Vol 46 (1) ◽  
pp. 234-241 ◽  
Author(s):  
Chae Un Kim ◽  
Jennifer L. Wierman ◽  
Richard Gillilan ◽  
Enju Lima ◽  
Sol M. Gruner
Keyword(s):  
High Pressure ◽  
Biological Samples ◽  
Protein Crystal ◽  
High Background ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
X Ray Scattering ◽  
Alternative Method ◽  
Helium Gas ◽  
Diffraction Imaging

High-pressure cryocooling has been developed as an alternative method for cryopreservation of macromolecular crystals and successfully applied for various technical and scientific studies. The method requires the preservation of crystal hydration as the crystal is pressurized with dry helium gas. Previously, crystal hydration was maintained either by coating crystals with a mineral oil or by enclosing crystals in a capillary which was filled with crystallization mother liquor. These methods are not well suited to weakly diffracting crystals because of the relatively high background scattering from the hydrating materials. Here, an alternative method of crystal hydration, called capillary shielding, is described. The specimen is kept hydratedviavapor diffusion in a shielding capillary while it is being pressure cryocooled. After cryocooling, the shielding capillary is removed to reduce background X-ray scattering. It is shown that, compared to previous crystal-hydration methods, the new hydration method produces superior crystal diffraction with little sign of crystal damage. Using the new method, a weakly diffracting protein crystal may be properly pressure cryocooled with little or no addition of external cryoprotectants, and significantly reduced background scattering can be observed from the resulting sample. Beyond the applications for macromolecular crystallography, it is shown that the method has great potential for the preparation of noncrystalline hydrated biological samples for coherent diffraction imaging with future X-ray sources.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

scholarly journals Complex wavefront sensing based on coherent diffraction imaging using vortex modulation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rujia Li ◽  
Liangcai Cao
Keyword(s):  
Phase Retrieval ◽  
Dynamic Range ◽  
A Priori ◽  
Measured Intensity ◽  
Physical Constraints ◽  
Coherent Diffraction Imaging ◽  
Effective Dynamic ◽  
Ill Posed ◽  
Retrieval Problem ◽  
Diffraction Imaging

AbstractPhase retrieval seeks to reconstruct the phase from the measured intensity, which is an ill-posed problem. A phase retrieval problem can be solved with physical constraints by modulating the investigated complex wavefront. Orbital angular momentum has been recently employed as a type of reliable modulation. The topological charge l is robust during propagation when there is atmospheric turbulence. In this work, topological modulation is used to solve the phase retrieval problem. Topological modulation offers an effective dynamic range of intensity constraints for reconstruction. The maximum intensity value of the spectrum is reduced by a factor of 173 under topological modulation when l is 50. The phase is iteratively reconstructed without a priori knowledge. The stagnation problem during the iteration can be avoided using multiple topological modulations.

scholarly journals Single Crystal Growth and Physical Properties of Pyroxene CoGeO3

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 378
Author(s):  
Li Zhao ◽  
Zhiwei Hu ◽  
Hanjie Guo ◽  
Christoph Geibel ◽  
Hong-Ji Lin ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Crystal Growth ◽  
Physical Properties ◽  
Single Crystal ◽  
Single Crystals ◽  
Magnetic Moments ◽  
Single Crystal Growth ◽  
The Impact

We report on the synthesis and physical properties of cm-sized CoGeO3 single crystals grown in a high pressure mirror furnace at pressures of 80 bar. Direction dependent magnetic susceptibility measurements on our single crystals reveal highly anisotropic magnetic properties that we attribute to the impact of strong single ion anisotropy appearing in this system with TN∼33.5 K. Furthermore, we observe effective magnetic moments that are exceeding the spin only values of the Co ions, which reveals the presence of sizable orbital moments in CoGeO3.

Experimental demonstration of coupled multi-peak Bragg coherent diffraction imaging with genetic algorithms

2021 ◽  
Vol 103 (21) ◽  
Author(s):  
Matthew J. Wilkin ◽  
Siddharth Maddali ◽  
Stephan O. Hruszkewycz ◽  
Anastasios Pateras ◽  
Richard L. Sandberg ◽  
...  
Keyword(s):  
Genetic Algorithms ◽  
Experimental Demonstration ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

scholarly journals Epitaxial lateral growth of single-crystal diamond under high pressure by a plate-to-plate MPCVD

2021 ◽  
Vol 1 (1) ◽  
pp. 143-149
Author(s):  
Wei Cao ◽  
Deng Gao ◽  
Hongyang Zhao ◽  
Zhibin Ma
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Lateral Growth ◽  
Single Crystal Diamond

High-resolution multi-planar coherent diffraction imaging with multimode fiber source

2021 ◽  
Vol 140 ◽  
pp. 106530
Author(s):  
Yuanyuan Liu ◽  
Qingwen Liu ◽  
You Li ◽  
Junyong Zhang ◽  
Zuyuan He
Keyword(s):  
High Resolution ◽  
Multimode Fiber ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

Single crystal growth, characterization and high-pressure Raman spectroscopy of impurity-free magnesite (MgCO3)

2017 ◽  
Vol 45 (5) ◽  
pp. 423-434 ◽  
Author(s):  
Wen Liang ◽  
Zeming Li ◽  
Yuan Yin ◽  
Rui Li ◽  
Lin Chen ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystal Growth ◽  
Growth Characterization

scholarly journals Magnetic Properties and Single Crystal Growth of a Spin Gapped Compound, High Pressure Phase of (VO)2P2O7.

1999 ◽  
Vol 46 (9) ◽  
pp. 1014-1019
Author(s):  
Takashi Saito ◽  
Masaki Azuma ◽  
Mikio Takano ◽  
Zenji Hiroi ◽  
Yasuo Narumi ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Properties ◽  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystal Growth ◽  
High Pressure Phase ◽  
Pressure Phase
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