Image Analysis and Saxs Characterisation of Mixed Aerogels

1995 ◽  
Vol 407 ◽  
Author(s):  
S. Blacher ◽  
Ph. Tihon ◽  
R. Pirard ◽  
J. P. Pirard ◽  
F. Brouers ◽  
...  
Keyword(s):  
Image Analysis ◽  
Statistical Methods ◽  
Small Angle ◽  
Fractal Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Adsorption Desorption ◽  
Ray Scattering

ABSTRACTThe fractal structure of SiO2 - ZrO2 mixed aerogel prepared for catalytic purpose is investigated using morphological statistical methods, small angle X-ray scattering and N2 adsorption-desorption measurements. These three methods provide a description of the aerogel structure over several decades.

scholarly journals Comparative characterisation of non-monodisperse gold nanoparticle populations by X-ray scattering and electron microscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (22) ◽  
pp. 12007-12013
Author(s):  
Ye Yang ◽  
Suiyang Liao ◽  
Zhi Luo ◽  
Runzhang Qi ◽  
Niamh Mac Fhionnlaoich ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Monte Carlo ◽  
Image Analysis ◽  
Small Angle ◽  
Method Comparison ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Ray Scattering

A cross-method comparison for quasi-monodisperse, polydisperse and bimodal gold nanoparticles of 2–7 nm in diameter between conventional image analysis of transmission electron micrographs and small-angle X-ray scattering with form-free Monte Carlo fitting.

EFFECT OF ANNEALING TEMPERATURE OF CERIUM OXIDE NANOPARTICLES STUDIED BY SMALL-ANGLE X-RAY SCATTERING

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2627-2632
Author(s):  
X. JU ◽  
L. X. RONG ◽  
J. ZHANG ◽  
B. Z. DONG
Keyword(s):  
Cerium Oxide ◽  
Small Angle ◽  
Annealing Temperature ◽  
Fractal Structure ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Mass Fractal ◽  
Ray Scattering

The evolution of microstructure of cerium oxide nanoparticles prepared in a sol-gel process was investigated by small-angle X-ray scattering (SAXS) measurements, in which the range of annealing temperature was from 298 K to 973 K in air. It was found that their scattering intensities increased dramatically and was proportional to h-a as the temperature went up to 873 K. Meanwhile, the average radius of gyration Rg, increased. This suggested that these cerium oxide nanoparticles have self-similar structure behavior or mass fractal structure. When the temperature was higher than 873 K, the feature of the SAXS spectra became identical to that of the sactterers with surface fractal structure rather than the mass fractal structure.

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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