Colloidal Crystals of NaYF4 Upconversion Nanocrystals Studied by Small-Angle X-Ray Scattering (SAXS)

2018 ◽  
Vol 36 (2) ◽  
pp. 1800391 ◽  
Author(s):  
Christian Homann ◽  
Joerg Bolze ◽  
Markus Haase
Keyword(s):  
Small Angle ◽  
Colloidal Crystals ◽  
X Ray ◽  
X Ray Scattering ◽  
Upconversion Nanocrystals ◽  
Ray Scattering

Synchrotron Small-Angle X-ray Scattering of Colloids and Photonic Colloidal Crystals

1997 ◽  
Vol 30 (5) ◽  
pp. 637-641 ◽  
Author(s):  
M. Megens ◽  
C. M. van Kats ◽  
P. Bösecke ◽  
W. L. Vos
Keyword(s):  
Form Factor ◽  
Small Angle ◽  
Colloidal Crystals ◽  
Lattice Parameter ◽  
X Ray ◽  
X Ray Scattering ◽  
Structure Factors ◽  
Particle Form ◽  
Diffraction Patterns ◽  
Ray Scattering

Synchrotron small-angle X-ray scattering (SAXS) experiments have been performed at the ESRF on colloidal dispersions. The samples are optically multiply scattering and are aimed at so-called photonic applications. Scattering from dilute suspensions yields the particle form factor, which shows many oscillations. From these results, the radius, size distribution and information about the internal structure of the particles in situ can be determined, in contrast to most studies on colloids. Using the form factor, structure factors can be extracted from the diffraction patterns of the colloidal crystals. The structure factors clearly reveal sharp Bragg peaks. The crystal structure, lattice parameter and average orientations were determined as a function of height in sedimented samples. This provides important information for the interpretation of optical experiments.

Grazing Incidence Small Angle X-ray Scattering on Colloidal Crystals

2010 ◽  
Vol 114 (39) ◽  
pp. 12473-12479 ◽  
Author(s):  
Patrick Huber ◽  
Oliver Bunk ◽  
Ullrich Pietsch ◽  
Marcus Textor ◽  
Thomas Geue
Keyword(s):  
Small Angle ◽  
Colloidal Crystals ◽  
Grazing Incidence ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A Revised O2 Reduction Model in Li-O2 Batteries as Revealed by in Situ Small Angle X-Ray Scattering

2019 ◽  
Author(s):  
Christian Prehal ◽  
Aleksej Samojlov ◽  
Manfred Nachtnebel ◽  
Manfred Kriechbaum ◽  
Heinz Amenitsch ◽  
...  
Keyword(s):  
Small Angle ◽  
Wide Angle ◽  
Reduction Mechanism ◽  
Reduction Model ◽  
X Ray ◽  
X Ray Scattering ◽  
O2 Reduction ◽  
Ray Scattering

<b>Here we use in situ small and wide angle X-ray scattering to elucidate unexpected mechanistic insights of the O2 reduction mechanism in Li-O2 batteries.<br></b>

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.

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