Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: POSTERS Polymerphysics
CPP 34.38: Poster
Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A
Characterisation of empty and polymer-filled, cylindrical mesopores using small-angle X-ray scattering — •Martin Engel1, Bernd Stühn1, Jörg Schneider1, Thomas Cornelius2, and Meike Naumann1 — 1Technische Universität Darmstadt — 2Gesellschaft für Schwerionenforschung mbH
With improvements in creating well-defined mesopores in the last decades their use for investigations in nanotechnology gained great attraction. They are very promising matrices offering controllable confined geometries for self-organisation processes. Before their use as matrices it is essential to characterise these systems. In current scientific literature mesoporous systems are the object of close investigations.
In our work two kinds of mesoporous systems, highly ordered 2D hexagonal cylindrical alumina on one hand and randomly distributed well defined cylindrical ion-track polycarbonate pores were investigated with small-angle X-ray scattering (SAXS) and additionally with scanning electron microscopy. The data are analysed with the help of currently accepted models modified to deal with different sample orientations. Hence important properties like opening diameter, cylinder distance, polydispersity and sample orientation, that show up in anisoptropy of the scattering image, can be characterised.
We fill this well-defined mesopores with diblock-copolymers. Static and time-resolved scattering experiments are planned to investigate structure formation in this kind of confined geometries. The influence of the confining geometry on the resulting structure and the potential of SAXS to determine these structures will be discussed.