X-ray Scattering Studies of Nanostructured Polymer Films
Staff Scientist, CHESS Cornell Synchrotron
Wed. September 28, 2005 1:00 PM Stirling C|
Self-assembled nanostructured polymer films currently receive a lot
of attention as possible templates or scaffolds for devices based on
nanomaterials. Such devices could be, for example, biosensors, solar
cells, or light-emitting diodes. Furthermore nanostructured films by
themselves play a role as biocompatible coatings for medical implants,
antireflective coatings for high-quality optics and solar cells, as well
as antifowling coatings protecting marine vessels. For coatings the
lateral scale ranges from square centimeters to many square meters, and
hence self-assembly is the only route for a cost-efficient preparation.
Small-angle x-ray scattering under grazing incidence (GISAXS) offers
a unique opportunity to study nanostructured films. Their structure can
be characterized in a non-destructive way and under in-situ conditions.
Moreover, real-time studies on the order of seconds allow to probe the
kinetics of film self-organization. Hence GISAXS complements traditional
high-resolution imaging techniques such as electron microscopy and atomic
force microscopy. In my talk selected examples will be given illustrating
the capabilities of the GISAXS technique applied to thin films of block
copolymers and nanocomposites.
|Refreshments will be available after the talk.|
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