Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: New Materials
CPP 5.5: Vortrag
Montag, 25. Februar 2008, 11:00–11:15, C 230
Nanopatterning of gold particles using a polymer template: in situ GISAXS study — •Ezzeldin Metwalli1, Sebastian Couet2, Kai Schlage2, Ralf Röhlsberger2, Volker Körstgens1, Matthias Ruderer1, Weinan Wang1, Gunar Kaune1, Stephan Roth2, and Peter Müller-Buschbaum1 — 1Physikdepartment E13, Technische Universität München, James-Franck-Str. 1, 85747 Garching, Germany — 2HASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany
The organization of metal nanoparticles within self-assembled polymer template is important for developing functional hybrid materials. Microphase-separated structures of mixed diblock-triblock copolymer thin films are used for the incorporation of gold atoms inside the polymer matrix via sputtering of gold. Polystyrene nanospheres are arranged in a liquid-like type with a well defined nearest neighbor distance inside a polyisoprene matrix acting as a template for directing the gold atoms. Sputtering conditions are selected with a low rate and a high pressure of argon gas inside the sputter chamber to avoid clustering in the atmosphere and on the polymer film. Due to the mobility of the gold atoms and the selective interaction with the polystyrene domains of the microphase separation structure, gold is accumulated in the PS spheres as probed with in situ grazing incidence small-angle x-ray scattering. Our study introduces the concept that, without thermal annealing of the gold attached polymer film, the gold assembly is not limited to the flat two dimensional but also included in three dimensional structures.