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    Growth of thin polymer films containing side-chain azo-dye analyzed by atomic force microscopy

    Year: 2009

    Journal: Surface Science, Volume 603, Issue 1, 1 January 2009, Pages 237-246, 20111221

    Authors: Hubert Gojzewski, Asta Richter, Danuta Wróbel, Aleksandra Apostoluk, Przemyslaw Siejak and Paul Raimond

    Organizations: Institute of Physics, Faculty of Technical Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznan, Poland, Department of Engineering Physics, University of Applied Sciences Wildau, Bahnhofstrasse 1, 15745 Wildau, Germany, Institut des Nanotechnologies de Lyon INL, CNRS-UMR5270, INSA-Lyon, Villeurbanne F-69621, France, INES RDI – LITEN/DTS/Dir, Savoie Technolac, BP 332 – 50 Avenue du Lac Léman, Le Bourget du Lac F-73377, France

    Thin films containing both the azo-dye disperse red 1 (DR1) and the poly(methylmetacrylate) (PMMA) or the poly(phenylenevinylene) (PPV) are deposited by Langmuir–Blodgett and spin coating techniques on various substrates. The morphology, surface structure and growth pattern of the azo-dye-polymers were studied by atomic force microscopy. Nucleation and growth processes are responsible for the generation of different structures. The spin coated films were additionally oriented using the electric field poling method (corona poling). The film homogeneity is improved by this method in all cases. Due to the polar character of DR1 molecules, rod-like sub-structures are observed after the corona poling process in DR1–MMA films. The indium tin oxide surface enhances reorientation of the azo-dye-polymer molecules during corona poling and results in a significant reduction of the surface roughness.