Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: POSTER: Micro and Nano Fluidics

CPP 19.14: Poster

Wednesday, March 28, 2007, 16:00–18:30, Poster B

Characterization of Colloids, Polymer Solutions and Nanoparticles Suspensions Flow by Surface Sensitive Scattering — •J.-F. Moulin¹, V. Körstgens¹, E. Metwalli¹, W. Wang¹, S.V. Roth², and P. Müller-Buschbaum¹ — ¹TUMünchen, Physik-Department E13, James-Franck-Str. 1, D-85747 Garching, Germany — ²HASYLAB@DESY, Notkestr. 85, D-22603 Hamburg, Germany

We will present the results of microbeam grazing incidence x-ray scattering (GISAXS) performed on fluidic channels. GISAXS enables to characterize the in plane ordering at the substrate surface and has proven a valuable technique for the characterisation of thin films and interfaces. Combining these strengths with fluidics opens a new field of potential studies: the formation of thin films from solutions can be followed as a function of the relevant parameters (e.g. flow, nature of the solvent), phenomena such as size sorting of colloids, influence of shear on polymers at interfaces (slippage) can also be investigated. The design of the experiment as well as experimental results demonstrating the feasibility of such measurements will be presented.

Funding of this work by the DFG priority program SPP 1164, project Mu 1487/2 on Nano and Microfluidics is gratefully acknowledged.