Microfocus Small Angle X-ray Scattering Reveals Structural Features in Archaeological Bone Samples; Detection of Changes in Bone Mineral Habit and Size

2002 ◽  
Vol 70 (2) ◽  
pp. 103-110 ◽  
Author(s):  
T. Wess ◽  
I. Alberts ◽  
J. Hiller ◽  
M. Drakopoulos ◽  
A.T. Chamberlain ◽  
...  
Keyword(s):  
Bone Mineral ◽  
Small Angle ◽  
Structural Features ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The morphology of bone mineral as revealed by small-angle X-ray scattering

1984 ◽  
Vol 801 (2) ◽  
pp. 298-305 ◽  
Author(s):  
N MATSUSHIMA ◽  
M AKIYAMA ◽  
Y TERAYAMA ◽  
Y IZUMI ◽  
Y MIYAKE
Keyword(s):  
Bone Mineral ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Characterizing nanoparticles with a laboratory diffractometer: from small-angle to total X-ray scattering

2014 ◽  
Vol 29 (S1) ◽  
pp. S47-S53 ◽  
Author(s):  
Marco Sommariva ◽  
Milen Gateshki ◽  
Jan-André Gertenbach ◽  
Joerg Bolze ◽  
Uwe König ◽  
...  
Keyword(s):  
Small Angle ◽  
Structural Features ◽  
Bragg Diffraction ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Pdf Analysis ◽  
Comprehensive Picture ◽  
Ray Scattering

X-ray diffraction and scattering on a single multipurpose X-ray platform have been used to probe the structure, composition, and thermal behavior of TiO2 nanoparticles ranging in size from 1 to 10 nm. Ambient and non-ambient Bragg diffraction, small-angle X-ray scattering (SAXS), as well as total scattering and pair-distribution function (PDF) analysis are combined to obtain a comprehensive picture of the samples. At these ultrasmall particle-size dimensions, SAXS and PDF prove powerful in distinguishing the salient features of the materials, in particular the size distribution of the primary particles (SAXS) and the identification of the TiO2 polymorphs (PDF). Structural features determined by X-ray scattering techniques are corroborated by high-resolution transmission electron microscopy. The elemental make-up of the materials has been measured using X-ray fluorescence spectrometry and energy-dispersive X-ray analysis.

On the nanostructure of radiation-amorphized zircon and pyrochlores: a small-angle x-ray scattering study

2005 ◽  
Vol 220 (8) ◽  
Author(s):  
Susana Ríos ◽  
Christopher M. Martin ◽  
Karl R. Whittle
Keyword(s):  
Small Angle ◽  
Annealing Temperature ◽  
Characteristic Length ◽  
Structural Features ◽  
Density Fluctuations ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Electron Density Fluctuations ◽  
Ray Scattering

AbstractNanoscale structural features of amorphous zircon and pyrochlore produced by self-irradiation induced amorphization have been characterized by small-angle X-ray scattering (SAXS). Electron density fluctuations were observed in the untreated samples and studied as a function of annealing temperature (up to 1300 °C). In untreated zircon, density fluctuations were found to have a characteristic length-scale of approximately 1 nanometer diameter. A clear scattering maximum develops at ∼3 nm

scholarly journals Nanocomposites of Au/Disentangled UHMWPE: A Combined Optical and Structural Study

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3225
Author(s):  
Stavros X. Drakopoulos ◽  
Oreste Tarallo ◽  
Linlin Guan ◽  
Ignacio Martin-Fabiani ◽  
Sara Ronca
Keyword(s):  
Gold Nanoparticles ◽  
Small Angle ◽  
Near Infrared ◽  
Polarized Light ◽  
Structural Features ◽  
X Ray ◽  
Optical Absorbance ◽  
Entanglement Density ◽  
X Ray Scattering ◽  
Ray Scattering

The term disentangled refers to polymers with fewer entanglements in the amorphous regions, a metastable condition that can significantly affect the material’s properties and processing behavior. The lower entanglement density in ultra-high molecular weight polyethylene (dis-UHMWPE) facilitates the solid-state processability into uniaxially-oriented specimens reaching very high draw ratios and crystallinities. In this study, Au/dis-UHMWPE nanocomposites were formulated and processed at variable draw ratios. Polarized light microscopy suggests gold nanoparticles are oriented in arrays following the drawing of polymer chains. The structural features, upon orientation, are studied by means of Raman spectroscopy, wide- and small-angle X-ray scattering, and near-infrared spectrophotometry. Crystallinity is found to increase by 15%, as calculated by wide-angle X-ray scattering. The change in optical absorbance in the visible spectrum indicates that, with orientation, the average size of gold aggregates increases, supported quantitatively by small-angle X-ray scattering. Since the gold nanoparticles are expected to be found within amorphous chain segments, the aforementioned findings are attributed to the increase of crystallinity and thus the decrease of available (amorphous) space.

Analysis of Tertiary Structural Features of Branched DNA Nanostructures with Partially Common Sequences Using Small-Angle X-ray Scattering

2019 ◽  
Vol 3 (1) ◽  
pp. 308-314
Author(s):  
Mengmeng Tan ◽  
Natsuki Takahashi ◽  
Shota Fujii ◽  
Kazuo Sakurai ◽  
Kosuke Kusamori ◽  
...  
Keyword(s):  
Small Angle ◽  
Structural Features ◽  
Dna Nanostructures ◽  
X Ray ◽  
X Ray Scattering ◽  
Branched Dna ◽  
Ray Scattering

Small angle X-ray scattering reveals changes of bone mineral habit and size in archaeological bone samples

2000 ◽  
Vol 9 (9) ◽  
pp. 36
Author(s):  
T. Wess ◽  
I. Alberts ◽  
G. Cameron ◽  
C. Laurie ◽  
J. Orgel ◽  
...  
Keyword(s):  
Bone Mineral ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Bone mineral ultrastructure in humans and various mammals as investigated by small-angle x-ray scattering

Bone ◽  
1995 ◽  
Vol 16 (3) ◽  
pp. 399 ◽  
Author(s):  
S. Schreiber ◽  
P. Fratzl ◽  
J. Eschberger ◽  
K. Klaushofer
Keyword(s):  
Bone Mineral ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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