Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 43: P8: Nanoparticles and Compsite Materials

CPP 43.4: Poster

Mittwoch, 18. März 2015, 10:00–13:00, Poster A

Structural study of magnetic nanoparticle-block copolymer hybrid films prepared by printing techniques — •Senlin Xia, Yuan Yao, Ezzeldin Metwalli, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching

Metal-polymer nano-composites are an important class of hybrid materials due to their interesting functional applications, e.g. sensors, and memory devices [1,2]. Hybrid films of magnetite nanoparticles and the diblock copolymer (DBC) poly(styrene-b-methyl methacrylate) are prepared using a printing method, with the potential of high mass production and energy saving. The relationship between viscosity of nanoparticle-polymer solution and the film formation was carefully explored in order to find the optimized processing conditions. The printed hybrid films are investigated using both real-space and reciprocal-space techniques. The nano- and microstructure of maghemite nanoparticles within DBC films as a function of the nanoparticle concentration is investigated using optical microscopy, atomic force microscopy, scanning electron microscopy and grazing incidence small-angle X-ray scattering. The magnetic property of the hybrid films is probed using a superconducting quantum interference device (SQUID) magnetometer. The observed structures are explained in the framework of microphase separation and confinements. A comparison of the nano-morphology between the spin-coated and printed hybrid films is discussed. [1] Y. Yao, et.al. ACS Appl. Mater. Interfaces 6, 5244, (2014); [2] Y. Yao et.al. ACS Appl. Mater. Interfaces 6, 18152, (2014).