Probing nanoscale structure and dynamics of soft matter by synchrotron X-ray scattering
- Event time: 1:00pm
- Event date: 31st March 2008
- Speaker: Theyencheri Narayanan (European Synchrotron Radiation Facility Grenoble)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
In this talk, I shall try to give an overview of different possibilities offered by synchrotron X-ray scattering for the investigation of soft matter. Recently, small-angle X-ray scattering (SAXS) has received renewed importance as a powerful characterization technique for soft condensed matter and biological systems. This trend is sequel to a combination of factors, most notably developments in X-ray instrumentation at modern synchrotron sources and parallel advancements of data analysis methods. One of the interesting outcomes is that the threshold of detection in scattering experiments has significantly diminished thereby allowing highly quantitative studies of extremely dilute systems and also probing very early stage of kinetic processes. I shall try to illustrate these developments using a variety of examples starting from model hard-sphere colloids to highly self-assembled biomaterials. Underlying issues include structure and interactions in concentrated systems, dynamics of self-assembly processes and multiscale structure of hierarchically ordered systems. Quantitative scattering experiments elucidate not only the transient structures and their growth dynamics but also reveal the link between nanoscale thermodynamics and macroscopic properties.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..