Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Poster: Wetting, Micro and Nano Fluidics

CPP 34.22: Poster

Mittwoch, 13. März 2013, 16:30–18:30, Poster C

Early stages of nanoparticle attachment to polyelectrolyte layers - in-situ GISAXS investigations with microfluidics and dipcoating — •Volker Körstgens¹, David Magerl¹, Neelima Paul¹, Martine Philipp¹, Jan Perlich², Stephan V. Roth², and Peter Müller-Buschbaum¹ — ¹TU München, Physik Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, 22603 Hamburg, Germany

In an application of the combination of microfluidics with in-situ GISAXS (grazing incidence small angle x-ray scattering) we investigate the early stages of the attachment of gold nanoparticles to polyelectrolyte layers. The study clearly shows the differing kinetics of the surface coverage of slightly negativly charged nanoparticles onto negatively charged layers of polystyrene sulfonate (PSS) and positively charged polyallylamine hydrochloride (PAH), respectively. With the microfocussed beam of a highly brillant x-ray third generation synchrotron a high time resolution is achieved. The microfluidic investigation with a special designed cell [1] is accompanied by GISAXS dip coating experiments [2] also performed in-situ.

[1] J.-F. Moulin et al., Rev. Sci. Instrum. 79, 015109 (2008).

[2] J. Perlich et al., Phys. Status Solidi RRL 6, 253 (2012).

This work has been financially supported by the BMBF (grant number 05K10WOA).