Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Nanoparticles, Nanocrystals and Composites

CPP 13.4: Poster

Montag, 7. März 2016, 18:15–21:00, Poster B2

Magnetic properties and structure of block copolymer-cobalt oxide nanocomposite thin films — •Hong Xu, Ezzeldin Metwalli, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany

Nanostructured polymer-metal oxide composites are a current research area of great importance due to its highlight applications in sensors, optics and catalysts. In the present investigation, the structure and properties of hybrid films composed of a PS-b-PMMA diblock copolymer (DBC) and cobalt metal salt were investigated. Cobalt metal salt oxidation in the polymer matrix was probed with UV/Vis and FTIR spectroscopies during the thermal treatment step. The inter-domain lamella spacing D was evaluated using GISAXS as a function of cobalt salt concentration. The D values increased with an increasing of Co/PMMA molar ratios. Both, paramagnetic and superparamagnetic behavior of the heat-treated hybrid films were proved at different cobalt salt contents using superconducting quantum interference device magnetometer.