Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Poster: Wetting, Micro and nanofluidics

CPP 21.14: Poster

Mittwoch, 28. März 2012, 11:00–13:00, Poster A

Flow induced surface attachment of gold nanorods as probed with microfluidics and in-situ GISAXS — •Volker Körstgens¹, Kuhu Sarkar¹, Gerd Herzog², Matthias Schwartzkopf², Adeline Buffet², Frans J. de Jong³, Stephan V. Roth², Michael Schlüter³, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, 22603 Hamburg, Germany — ³TU Hamburg-Harburg, IMS, 21073, Hamburg, Germany

The attachment of nanoparticles to a surface can be followed in-situ with GISAXS (grazing incidence small angle x-ray scattering) with a special designed microfluidic flow cell [1]. In this study the attachment of different gold nanoparticles including high aspect ratio gold nanorods to surfaces of insoluble calcium-alginate films is investigated. A scan along the microfluidic channel is carried out, collecting scattering data at different positions. With the brillant x-ray source available at the beamline MiNaXS of the PETRA III synchrotron source this procedure offers a time resolved as well as a position resolved GISAXS investigation of the attachment of nanoparticles. Information about the flow induced orientation of the attached high aspect ratio nanoparticles can be deduced from the GISAXS experiments.

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

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