Web Release Date: February 21,
Correlated Roughness in Polymer Films Containing Maghemite Nanoparticles
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Physik Department LS E13, TU München, James-Franck-Strasse 1, 85747 Garching, Germany, Physics Department, Université de Fribourg, Chemin du Musée 3, 1700 Fribourg, Switzerland, and HASYLAB at DESY, Notke Strasse 85, 22603 Hamburg, Germany
Received September 26, 2007
Revised Manuscript Received January 7, 2008
Abstract:
Two different uniform thicknesses (8 and 68 nm) of a nanocomposite film comprising diblock copolymer matrix and magnetic nanoparticles filler have been installed in one sample preparation step under identical condition simultaneously. Long-range interface correlations are investigated. Maghemite (F2O3) nanoparticles covered with polystyrene chains are incorporated in polystyrene-block-polyisoprene to produce such film. The film is investigated with atomic force microscopy (AFM), X-ray reflectivity (XR), and scanning microfocus grazing incident small-angle X-ray scattering (GISAXS). The roughness of the substrate is replicated on the 68 nm thick composite film surface resulting in roughness correlation in a waveguide manner. No roughness correlation is observed in 8 nm film.
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