Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: Poster: Wetting, Micro and Nano Fluidics
CPP 34.4: Poster
Mittwoch, 13. März 2013, 16:30–18:30, Poster C
Advanced in situ GISAXS investigations of drying and adsorption kinetics — •Berit Heidmann1,2, Matthias Schwartzkopf1, Gonzalo Santoro1, Shun Yu1, Gerd Herzog1,2, Roman Mannweiler1, Johannes F.H. Risch1, Wilfried Wurth2, and Stephan V. Roth1 — 1Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, D-22607 Hamburg, Germany — 2Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
Tailored gold nanoparticle assemblies play an important role for technological applications like solar cells, nanocatalysts and bioelectronics [1]. Solution casting is a promising process that enables low-cost fabrication of such devices. Grazing incidence small-angle X-ray scattering (GISAXS) is a powerful tool for in situ investigations of fast surface processes on nanoscale [2]. We have combined GISAXS and a contact angle apparatus to perform drop drying kinetic measurements with improved accuracy and flexibility. Using advanced drop casting deposition technique, we investigated in situ the drying kinetics during self-assembly of gold nanoparticles and the influence of different functionalized silicon surfaces on the process. In order to investigate the effect of the X-ray beam on sample surfaces, we compared in situ and ex situ drop drying experiments. Furthermore, the setup allows for investigation of different wetting behaviors as a function of X-ray radiation dose. [1] Bauer at al., Nanotechnology, 14, 1289-1311 (2003) [2] Roth et al., J. Phys.: Condens. Matter , 23, 254208 (2011)