3D Small Angle X-Ray Scattering (SAXS) on deformed PVDF Foils

2003 ◽  
Vol 782 ◽  
Author(s):  
Guenther Maier ◽  
Gernot Wallner ◽  
Peter Fratzl
Keyword(s):  
Small Angle ◽  
Deformation Mechanism ◽  
Structural Changes ◽  
Three Dimensional ◽  
Nanometer Scale ◽  
X Ray ◽  
X Ray Scattering ◽  
Structure Changes ◽  
Bundle Structure ◽  
Ray Scattering

ABSTRACT3D Small Angle X-ray scattering (3D – SAXS) was applied to study the microstructure and the deformation mechanism in PVDF – foils (polyvinyhdene fluoride). SAXS is a powerful tool to investigate structural changes in deformed polymers to reveal morphology at the nanometer scale. When PVDF is strained the structure changes from spherohtic isotropie to a highly anisotropie fiber bundle structure, which requires a full three-dimensional analysis of the SAXS signal.

X-ray imaging with ultra-small-angle X-ray scattering as a contrast mechanism

2004 ◽  
Vol 37 (5) ◽  
pp. 757-765 ◽  
Author(s):  
L. E. Levine ◽  
G. G. Long
Keyword(s):  
Small Angle ◽  
Imaging Technique ◽  
Three Dimensional ◽  
Sample Volume ◽  
Contrast Imaging ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Imaging ◽  
Contrast Mechanism ◽  
Ray Scattering

A new transmission X-ray imaging technique using ultra-small-angle X-ray scattering (USAXS) as a contrast mechanism is described. USAXS imaging can sometimes provide contrast in cases where radiography and phase-contrast imaging are unsuccessful. Images produced at different scattering vectors highlight different microstructural features within the same sample volume. When used in conjunction with USAXS scans, USAXS imaging provides substantial quantitative and qualitative three-dimensional information on the sizes, shapes and spatial arrangements of the scattering objects. The imaging technique is demonstrated on metal and biological samples.

Small angle X-ray scattering study of structural changes in silica gel modified with organofunctional groups

1989 ◽  
Vol 40 ◽  
pp. 1-8 ◽  
Author(s):  
Dimas R. Vollet ◽  
José C. Moreira ◽  
Lauro T. Kubota ◽  
José A. Varela ◽  
Yoshitaka Gushikem
Keyword(s):  
Silica Gel ◽  
Small Angle ◽  
Structural Changes ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

4Calcium(2+).cntdot.troponin C forms dimers in solution at neutral pH that dissociate upon binding various peptides: Small-angle x-ray scattering studies of peptide-induced structural changes

Biochemistry ◽  
1992 ◽  
Vol 31 (46) ◽  
pp. 11326-11334 ◽  
Author(s):  
S. L. Blechner ◽  
G. A. Olah ◽  
N. C. J. Strynadka ◽  
R. S. Hodges ◽  
J. Trewhella
Keyword(s):  
Small Angle ◽  
Structural Changes ◽  
X Ray ◽  
Neutral Ph ◽  
X Ray Scattering ◽  
Ray Scattering

Light-Induced Structural Changes of LOV Domain-Containing Polypeptides fromArabidopsisPhototropin 1 and 2 Studied by Small-Angle X-ray Scattering†

Biochemistry ◽  
2004 ◽  
Vol 43 (47) ◽  
pp. 14881-14890 ◽  
Author(s):  
Masayoshi Nakasako ◽  
Tatsuya Iwata ◽  
Daisuke Matsuoka ◽  
Satoru Tokutomi
Keyword(s):  
Small Angle ◽  
Structural Changes ◽  
Lov Domain ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Ultra small-angle X-ray scattering studies on structural changes in micrometers upon uniaxial stretching of segmented polyurethaneureas

Polymer ◽  
2009 ◽  
Vol 50 (6) ◽  
pp. 1566-1576 ◽  
Author(s):  
Shinichi Sakurai ◽  
Hidekazu Yoshida ◽  
Fumio Hashimoto ◽  
Miaki Shibaya ◽  
Hideaki Ishihara ◽  
...  
Keyword(s):  
Small Angle ◽  
Structural Changes ◽  
Uniaxial Stretching ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Correlation of Small-Angle X-Ray Scattering and Solar Cell Performance of a-SiGe:H Alloys

1993 ◽  
Vol 297 ◽  
Author(s):  
S.J. Jones ◽  
Y. Chen ◽  
D.L. Williamson ◽  
X. Xu ◽  
J. Yang ◽  
...  
Keyword(s):  
Solar Cell ◽  
Small Angle ◽  
Film Surface ◽  
Nanometer Scale ◽  
Low Density ◽  
Solar Cell Performance ◽  
X Ray ◽  
X Ray Scattering ◽  
Cell Structures ◽  
Ray Scattering

Small-angle x-ray scattering (SAXS) measurements were made on a-SiGe:H alloys to study microstructure on the nanometer scale as a function of Ge content, and the results were compared with representative single-junction solar cell properties. Samples consisting of only the i-layer were used for SAXS. Above a Ge content of 20 %, a significant increase in SAXS was seen. From measurements made with the samples tilted relative to the incident x-ray beam, the increase in scattering is attributed to the appearance of elongated low density regions in the film, modeled as ellipsoidal microvoids, which are preferentially oriented perpendicular to the film surface and may be related to columnar-like microstructure. Flotation density measurements support the presence of low density regions. Initial and light-degraded measurements on corresponding solar cell structures do not show a correlation between SAXS and initial cell properties; there is, however, some evidence that the light-induced degradation is higher for cells with larger amounts of SAXS-detected microstructure and this needs further investigation.

Simulation of small-angle X-ray scattering from thylakoid membranes

2009 ◽  
Vol 42 (4) ◽  
pp. 649-659 ◽  
Author(s):  
J. J. K. Kirkensgaard ◽  
J. K. Holm ◽  
J. K. Larsen ◽  
D. Posselt
Keyword(s):  
Experimental Data ◽  
Small Angle ◽  
Virtual Instrument ◽  
Three Dimensional ◽  
Thylakoid Membranes ◽  
Three Dimensional Model ◽  
General Applicability ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Small-angle X-ray scattering (SAXS) patterns are calculated from a three-dimensional model of photosynthetic thylakoid membranes. The intricate structure of the thylakoids is represented by sampling random `electron density points' on geometric surfaces. The simulation setup works as a virtual instrument, allowing direct comparison with experimental data. The simulations qualitatively reproduce experimental data and thus clarify the structural origin of the scattering features. This is used to explain recent SAXS measurements and as a guideline for new experiments and future quantitative modeling. The setup has general applicability for model testing purposes when modeling scattering from membrane systems of complex geometries.

scholarly journals Two practical Java software tools for small-angle X-ray scattering analysis of biomolecules

2014 ◽  
Vol 47 (2) ◽  
pp. 810-815 ◽  
Author(s):  
Andreas Hofmann ◽  
Andrew E. Whitten
Keyword(s):  
Small Angle ◽  
Three Dimensional ◽  
Small Angle Scattering ◽  
Ease Of Use ◽  
Scattering Data ◽  
X Ray ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Three Dimensional Models ◽  
Ray Scattering

Small-angle X-ray scattering has established itself as a common technique in structural biology research. Here, two novel Java applications to aid modelling of three-dimensional macromolecular structures based on small-angle scattering data are described.MolScatis an application that computes small-angle scattering intensities from user-provided three-dimensional models. The program can fit the theoretical scattering intensities to experimental X-ray scattering data.SAFIRis a program for interactive rigid-body modelling into low-resolution shapes restored from small-angle scattering data. The program has been designed with an emphasis on ease of use and intuitive handling. An embedded version ofMolScatis used to enable quick evaluation of the fit between the model and experimental scattering data.SAFIRalso provides options to refine macromolecular complexes with optional user-specified restraints against scattering data by means of a Monte Carlo approach.

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