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    Biomimetic synthesis of calcium carbonate bilayers interfaced by a diblock copolymer template

    Year: 2012

    Journal: Crystalline Materials, 2012, 227 (11), 739-743, 20131009

    Authors: Jeroen A. C. M. Goos, Cong D. Vo, Archan Dey, Chris J. van den Hoogen, Niek J. H. G. M. Lousberg, Marco M. R. M. Hendrix, Nicola Tirelli, Gijsbertus de With, Nico Sommerdijk, Nico Sommerdijk

    Organizations: Laboratory of Materials and Interface Chemistry and SoftMatter CryoTEM Unit, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Laboratory of Polymers and Biomaterials, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, United Kingdom

    The synthesis of a new class of hybrid materials with two differently oriented layers of calcite at adjacent sides of an organic template is demonstrated. A Langmuir monolayer of the amphiphilic block copolymer poly(butyl acrylate)-b-poly(hydroxypropyl acrylate) directs the formation of a first CaCO3 phase through interaction with the hydrophilic poly(hydroxypropyl acrylate) blocks. After partial hydrolysis of the hydrophobic poly(butyl acrylate) segments a second CaCO3 phase is formed on the monolayer associated to the first mineral phase. Thus, bilayered CaCO3-based hybrid materials are obtained with two differently oriented calcite phases at opposite sides of the polymer film. By using DNA as an additive the crystal orientation in the second layer can be modified.