An Exact Evaluation of Salt Concentration Dependence of Interparticle Distance in Colloidal Crystals by Ultra-Small-Angle X-ray Scattering. 3. Confirmation of Solid−Liquid Transition by Three-Dimensional Paracrystal Analysis

Langmuir ◽  
1999 ◽  
Vol 15 (2) ◽  
pp. 573-577 ◽  
Author(s):  
Tamotsu Harada ◽  
Hideki Matsuoka ◽  
Takashi Ikeda ◽  
Hitoshi Yamaoka
Keyword(s):  
Salt Concentration ◽  
Small Angle ◽  
Three Dimensional ◽  
Interparticle Distance ◽  
Colloidal Crystals ◽  
X Ray ◽  
X Ray Scattering ◽  
Liquid Transition ◽  
Exact Evaluation ◽  
Solid Liquid

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.

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 Grazing-Transmission Scattering for Measuring Nano-structured Thin Films

2014 ◽  
Vol 70 (a1) ◽  
pp. C876-C876
Author(s):  
Kevin Yager
Keyword(s):  
Thin Films ◽  
Data Analysis ◽  
Small Angle ◽  
Three Dimensional ◽  
Object Size ◽  
X Ray ◽  
X Ray Scattering ◽  
Lattice Symmetry ◽  
Scattering Geometry ◽  
Nanoscale Order

We describe a new scattering geometry which can be used to quantify three-dimensional nanoscale order in thin films: Grazing-Transmission Small-Angle X-ray Scattering (GTSAXS). This technique collects sub-horizon scattering which exits from the edge of the sample, and does not suffer from the large refraction-distortions and multiple-scattering terms that complicate GISAXS data analysis. We also present a new modelling formalism applicable to superlattices of nano-objects, where lattice symmetry and nano-object size/shape can be arbitrarily defined.

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.

Simulations of the transmission small angle x-ray scattering for three-dimensional architectures

2021 ◽  
Author(s):  
Tianjuan Yang ◽  
Jiahao Zhang ◽  
Jianyuan Ma ◽  
Shiyuan Liu ◽  
Xiuguo Chen
Keyword(s):  
Small Angle ◽  
Three Dimensional ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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