Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 10: Wetting, Micro and Nanofluidics
CPP 10.5: Vortrag
Montag, 31. März 2014, 16:00–16:15, ZEU 114
Following structural changes in nanoparticle films under laminar flow conditions with in-situ SAXS microfluidics — •Volker Körstgens1, Martine Philipp1, David Magerl1, Martin A. Niedermeier1, Johannes Schlipf1, Lin Song1, Gonzalo Santoro2, Vasyl Haramus3, Stephan V. Roth2, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — 2DESY, Notkestr. 85, 22603 Hamburg — 3Helmholtz-Zentrum Geesthacht: Zentrum für Material- und Küstenforschung GmbH, 21502 Geesthacht
Microfluidic processes which are accompanied with structural changes at the solid-liquid interface are monitored with in-situ small angle x-ray scattering (SAXS) using a micro-focused x-ray beam. Changes of the nanostructure of a film of nanospheres dispersed in a matrix of sodium alginate of algal origin and its cross-linked analogue are followed during flow of water through a microfluidic channel. The study includes the investigation in transmission through the channel walls (SAXS) as well as in grazing incidence addressing the nanoparticle films on the substrate (GISAXS). Structural changes caused by the laminar flow in the microfluidic channel are traced and demonstrate the possibilities of both complementary in-situ SAXS techniques.
This work has been financially supported by the BMBF (grant number 05K10WOA).