Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Focus: Magnetic Soft Matter I
CPP 19.7: Vortrag
Dienstag, 24. März 2009, 12:00–12:15, ZEU 222
Particle co-operated block copolymer self-assembly — •Mottakin M. Abul Kashem1, Jan Perlich1, Alexander Diethert1, Weinan Wang1, Mine Memesa2, Jochen S. Gutmann2, Eva Majkova3, Ignác Capek4, Stephan V. Roth5, and Müller-Buschbaum Peter1 — 1TU München, Physik-Department LS E13, James-Franck-Str.1, Garching, Germany — 2MPI for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany — 3Inst. of Phys. SAS, Dúbravská 9, SK 84511 Bratislava, Slovakia — 4Polymer Inst., SAS, Dúbravská 9, SK 84236 Bratislava, Slovakia — 5HASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany
We have investigated the role of nanoparticles in particle co-operated self-assembly process and the domain orientation in asymmetric diblock copolymer films in order to create ordered array of magnetic nanoparticles [1-2]. Thin films are prepared from solutions of polystyrene-block-polymethylmethacrylate (PS-b-PMMA) containing varying amount of iron oxide nanoparticles. During annealing, the nanoparticles distribute themselves inside the cylindrical domains of PMMA, which increases the diameters of cylindrical domains and cylinder-to-cylinder distances. Moreover, the nanoparticles contribute to the perpendicular orientation of PMMA domains through balancing the interfacial energy difference between PS and PMMA blocks. The investigations have been carried out by using AFM and SEM, x-ray reflectivity and GISAXS.
1.Abul Kashem, et al. Macromolecules 2007, 40, 5075. 2.Abul Kashem, et al. Macromolecules 2008, 41, 2186.