Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 7: POSTERS Rheology
CPP 7.14: Poster
Montag, 25. Februar 2008, 16:45–19:00, Poster A
Structure and dynamics within the length scale of the boundary layer — •Marco Walz1, Nicole Voss1, Max Wolff2, Hartmut Zabel2, and Andreas Magerl1 — 1Chair for Crystallography and Structural Physics, University of Erlangen-Nürnberg, Staudtstr. 3, 91058 Erlangen — 2Chair for Condensed Matter Physics, Ruhr-University Bochum, Universitätsstr. 150, 44780 Bochum
Shear anomalies may manifest themselves by unusual solid-liquid interface properties. Structural issues can be studied by GISANS and reflectometry which can be tuned to be particularly surface sensitive. In earlier studies by GISANS slightly above the critical angle, we observed a crystalline ordering of micellar solutions depending on the chemical termination of the solid boundary. An extension to smaller angles implying an increased sensitivity to near surface structures shows that the local structure depends on the distance to the interface. In addition a first attempt to access the dynamics in the near surface region by grazing incidence neutron spin echo (GINSE) indicates that also the micellar dynamics in this region is responsive to the chemical potential of the boundary.
The authors gratefully acknowledge the financial support by the DFG grants MA801/12-1 and ZA161/18-1 within the priority program (SPP) 1164 and the BMBF grant ADAM 04ZAE8BO.