An Introduction to Small-Angle X-ray (and Some Neutron) Scattering:
This course is being prepared as of 041211 but may have some useful information.
Please e-mail Greg Beaucage if you are interested in contributing to this page or in adding public access links.
(content will be free public access via multiple sites when completed)
Department of Chemical and Materials Engineering University of Cincinnati Cincinnati, Ohio 513 556-3063 |
Purpose:
This web course will provide the essential tools needed to understand
and apply scattering to a variety of technical and scientific problems
from an introductory level and is aimed at first or second year
graduate students and researchers new to the the field. The
course will be based on a web text which will be updated as the course
is taught at the University of Vermont and at the University of
Cincinnati. The course text is intended as a web reference on
small-angle scattering and covers more material than can be taught in a
traditional quarter or semester course. This web text is an
on-going effort and will be frequently updated and modified.
Please feel free to submit a contribution to the text, comments,
corrections and questions. The outline below is intended to frame
the subject of small angle x-ray scattering. It contains some
entries but is far from complete.
Glatter/Kratky Book
(1982) 46Mb
1) Physics of Scattering Event (This could be an appendix)
Texts: Warren/Guinier etc. Better copy of Guinier
Special emphasis on differences between synchrotron and tube sources, definition of all types of insertion devices and comparative flux for difference sources. Links to user facilities and discussion of proposal process for beamtime at international facilities. Probability of success for first time applications and hints at successful proposal writing.
List of world class SAXS facilities with some kind of ranking would be good also with the odds of a first time user gaining access.
Links: XRD Chapter (UC); Imaginary Numbers and Scattering; Cambridge University Imaginary Numbers; LANL Neutron Diffraction (moderately slow load), Svergun Book Article
2) Classification of
scattering. Correlation versus structure. Similarity and
differences in scattering features from regular structure and
periodicity.
(philosophy of scattering.)
Links: Chapter from XRD Course (UC); (Older Version); SAXS Laboratory Experiment (UC); Glatter on SAXS (moderately slow load); Rod scattering; SAXS Page Drexel; SANS ISIS; SAXS OklU; UNICAT Chicago; UNICAT Chicago
3) Disordered structural scattering (globally dilute systems)::
Guinier
Porod
Schmidt (surface scattering)
Hurd/Martin/Schaefer (Mass-fractal Scattering)
Unified Function
4) Concentration effects in disordered systems
f (1-f)
correlation: Born-Green Function
Mass-fractal scaling
Micellar Correlations
5) Polydispersity
Sphere function dispersions etc.
Maximum Entropy and other methods
Unified approach
Moments available from scattering
Comparison with other techniques particularly microscopy
6) Scattering from idealized regular structure
Polymer lamellar scattering
BCP
Colloids
Complex biological systems: Svergun
7) Scattering from highly correlated systems
Correlation function approach
Catagorization of disorder in order
8) Techniques to study Orientation
Legendre polynomials
Uniaxial orientation and the Hermans Orientation Function
Biaxial orientation
General orientation in 3D
Application to polymer lamellae
Application to other systems
Wilchinsky triangle and Stein Approach
Empirical and semi-empirical approaches.
9) Thermodynamics from Scattering (single phase scattering)
Compressibility
Zimm (dilute)
RPA/deGennes (concentrated)
BCP and micellar thermodynamics
10) Contrast enhancement and matching/Phase contrast and absolute intensity
11) Multiple scattering (NIST)
12) Synchrotron facilities/application of tunable wavelength techniques
13) Scattering Contrast Imaging (Such as at UNICAT)
14) Survey of scattering instrumentation
Pinhole
Bonse-Hart
Kratky
Other Cameras
15) Desmearing (Code and links to shareware code such as UNICAT code.)
Schmidt
Austrians/Gratz
Lake (UNICAT)
16) Data reduction Shareware
NIST
UNICAT
etc.
17) Links to scattering sites around the world (in order of entry not ranking Please email to be added beaucag@uc.edu):
1) UNICAT/APS
2) ID02/ESRF
3) IPNS/Argonne
4) NIST
5) ILL
18) TOPICAL SECTION (Contributors needed)
1) Scattering in Biology/ACA workshop
2) Scattering in Semi-crystalline polymers
3) Scattering in Solutions and Polymer/Polymer blends
4) Scattering from Disordered Materials
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