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CPP: Chemische Physik und Polymerphysik

CPP 11: POSTER Disperse Polymer Systems

CPP 11.7: Poster

Tuesday, March 28, 2006, 17:00–19:00, P3

Microbeam-GISAXS investigation of flow induced structures — •E. Bauer¹, S.V. Roth², and P. Müller-Buschbaum¹ — ¹TU München, Physik-Department E13, James-Franck-Str. 1, D-85747 Garching, Germany — ²HASYLAB at DESY, Notkestr. 85, D-22603 Hamburg, Germany

Flow in nanoscale geometries is of importance in many areas as for example in chip production, printing techniques and bio-medical sensing devices. While on a local scale the surface structure is nicely pictured by AFM, scattering is usually applied to obtain a mean statistical information. With grazing incidence small-angle x-ray scattering (GISAXS) a length regime comparable to AFM is addressed. A local scattering information becomes accessible by combining GISAXS with a micron sized x-ray beam and scanning of the sample relative to the beam. We demonstrate the actual possibilities of this technique by locally probing the influence of selected boundary conditions on the movement of liquid fronts to reach a deeper understanding of the influence of the selected boundaries on flow at different lengths scales. In the presented example a blend solution (PS:PBr(0.34)S = 1:9) in toluene was deposited as a drop on top of a polyimide-coated substrate.