Organic-inorganic hybrid materials are interesting for many applications, ranging from biomimetics to catalysis. One important factor for the performance of the material is the microscopic structure. The presentation is about the preparation of mesoporous (in the range of one to several micrometer) polymer films, that are prepared by the so-called breathfigure technique. Those films can act as templates for biomimerals, such as calcium carbonate (a component of seashells, diatoms, and snails), or apatite (a component of teeth enamel and bone). The films and the resulting mesoscopic hybrid materials were characterized by scanning electron microscopy. Also, a diffuson controlled process in an aqueous solution can lead to fractal growths of inorganic curliflower-like structures.
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