In-Situ Time-Resolved X-Ray Studies of Eutectic Crystallization in Amorphous Fe1−xBx and Co1−xZrx

1991 ◽  
Vol 237 ◽  
Author(s):  
Henry E. Fischer ◽  
S. Brauer ◽  
M. Sutton ◽  
J. Ström-Olsen ◽  
A. Zaluska ◽  
...  
Keyword(s):  
Small Angle ◽  
Large Angle ◽  
Structural Evolution ◽  
Eutectic Growth ◽  
Eutectic Structure ◽  
Time Resolved ◽  
X Ray ◽  
Eutectic Crystallization ◽  
Diffraction Patterns

ABSTRACTUsing a millisecond time-resolved x-ray scattering technique at the National Synchrotron Light Source, we have simultaneously obtained in situ both large-angle (LAXS) and small-angle (SAXS) diffraction patterns for isothermal crystallization of amorphous Fe1−xBx (0.16 < x < 0.21) and Co1−xZrx (0.08 < x < 0.11). The large-angle x-ray data are analyzed to determine which of the two crystalline products nucleate first in each compound, and also to assess the evidence for eutectic growth as shown by a time-independent ratio of volume fractions of these product phases. The small-angle data give the length scales of the eutectic structure as well as information about its time evolution. Combining our x-ray results with TEM studies, we examine the effects of changes in temperature and composition on the structural evolution of both the amorphous and crystalline phases.

In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Hao Wu ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Matthew Tirrell
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Polyelectrolyte Complex ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

scholarly journals Elucidating the Structural Evolution of a Highy Porous Responsive Metal-Organic Framework (DUT-49(M)) upon Guests Desorption by Time-Resolved In-Situ Powder X-Ray Diffraction

2020 ◽  
Author(s):  
Bikash Garai ◽  
Volodymyr Bon ◽  
Francesco Walenszus ◽  
Azat Khadiev ◽  
Dmitri Novikov ◽  
...  
Keyword(s):  
Adsorption Isotherms ◽  
Metal Organic Framework ◽  
Structural Evolution ◽  
Structural Transformations ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Metal Organic ◽  
Subcritical Fluid

Variation in the metal centres of M-M paddle-wheel SBU results in the formation of isostructural DUT-49(M) frameworks. However, the porosity of the framework was found to be different for each of the structures. While a high and moderate porosity was obtained for DUT-49(Cu) and DUT-49(Ni), respectively, other members of the series [DUT-49(M); M= Mn, Fe, Co, Zn, Cd] show very low porosity and shapes of the adsorption isotherms which is not expected for op phases of these MOFs. Investigation on those MOFs revealed that those frameworks undergo structural collapse during the solvent removal at the activation step. Thus, herein, we aimed to study the detailed structural transformations that are possibly occurring during the removal of the subcritical fluid from the framework.

D-94 Invited—In-Situ and Time Resolved Small-Angle X-ray Scattering

2010 ◽  
Vol 25 (2) ◽  
pp. 211-211
Author(s):  
B. G. Landes ◽  
B. J. Kern ◽  
T. J. Hermel-Davidock ◽  
M. Demirors ◽  
J. D. Weinhold ◽  
...  
Keyword(s):  
Small Angle ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals A Flow-Through Reaction Cell for Studying Minerals Leaching by In-Situ Synchrotron Powder X-ray Diffraction

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 990
Author(s):  
Fatemeh Nikkhou ◽  
Fang Xia ◽  
Xizhi Yao ◽  
Idowu A. Adegoke ◽  
Qinfen Gu ◽  
...  
Keyword(s):  
Flow Rate ◽  
Pressure Leaching ◽  
X Ray Diffraction ◽  
Reaction Cell ◽  
Time Resolved ◽  
X Ray ◽  
Ore Minerals ◽  
Flow Through ◽  
Diffraction Patterns

A flow-through reaction cell has been developed for studying minerals leaching by in-situ time-resolved powder X-ray diffraction, allowing for a better understanding of the leaching mechanisms and kinetics. The cell has the capability of independent control of temperature (up to 95 °C) and flow rate (>0.5 mL min−1) for atmospheric pressure leaching. It was successfully tested at the powder diffraction beamline at the Australian Synchrotron. Galena powder was leached in a citrate solution under flow-through condition at a flow rate of 0.5 mL min−1, while diffraction patterns were collected during the entire leaching process, showing rapid galena dissolution without the formation of secondary mineral phases. The flow-through cell can be used to study leaching processes of other ore minerals.

Characterization of the Initial Stages of SBA-15 Synthesis by in Situ Time-Resolved Small-Angle X-ray Scattering

2005 ◽  
Vol 109 (48) ◽  
pp. 22780-22790 ◽  
Author(s):  
Andrei Y. Khodakov ◽  
Vladimir L. Zholobenko ◽  
Marianne Impéror-Clerc ◽  
Dominique Durand
Keyword(s):  
Small Angle ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Structural Evolution of Aqueous Zirconium Acetate by Time-Resolved Small-Angle X-ray Scattering and Rheology

2015 ◽  
Vol 119 (22) ◽  
pp. 12660-12667 ◽  
Author(s):  
Martin Bremholm ◽  
Henrik Birkedal ◽  
Bo Brummerstedt Iversen ◽  
Jan Skov Pedersen
Keyword(s):  
Small Angle ◽  
Structural Evolution ◽  
Time Resolved ◽  
X Ray ◽  
Zirconium Acetate ◽  
X Ray Scattering ◽  
Ray Scattering

Solvent diffusion in polymer-embedded hollow nanoparticles studied by in situ small angle X-ray scattering

2017 ◽  
Vol 19 (32) ◽  
pp. 21663-21671
Author(s):  
Zhi Hong Chen ◽  
Sun Hye Hwang ◽  
Xiang-bing Zeng ◽  
Jongmin Roh ◽  
Jyongsik Jang ◽  
...  
Keyword(s):  
Small Angle ◽  
Hollow Nanoparticles ◽  
Time Resolved ◽  
X Ray ◽  
Solvent Diffusion ◽  
X Ray Scattering ◽  
Ray Scattering

In situ time-resolved small-angle X-ray scattering is introduced to monitor diffusion of a solvent into a polymer and into sub-100 nm ceramic hollow nanoparticles.

Time-Resolved in Situ Small-Angle X-ray Scattering Study of Silica Particle Formation in Nonionic Water-in-Oil Microemulsions

Langmuir ◽  
2008 ◽  
Vol 24 (10) ◽  
pp. 5225-5228 ◽  
Author(s):  
P. Riello ◽  
M. Mattiazzi ◽  
J. S. Pedersen ◽  
A. Benedetti
Keyword(s):  
Small Angle ◽  
Silica Particle ◽  
Particle Formation ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering
Sign in / Sign up

Export Citation Format

Share Document