Calcium carbonate mineralization: X-ray microdiffraction probing of the interface of an evaporating drop on a superhydrophobic surface |
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Authors: | Accardo Angelo Burghammer Manfred Di Cola Emanuela Reynolds Michael Di Fabrizio Enzo Riekel Christian |
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Institution: | Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Gr?cia, Viale Europa, Catanzaro 88100, Italy. ngelo.accardo@esrf.fr |
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Abstract: | The liquid/air interface of calcium bicarbonate solution drops was probed by synchrotron radiation microbeam scattering. The drops were deposited on a nanopatterned superhydrophobic poly(methyl methacrylate) surface and raster-scanned during evaporation by small-angle and wide-angle X-ray scattering. The appearance of about 200-nm-size calcite crystallites at the interface could be spatially resolved at the onset of crystallization. Diffuse scattering from the interface is attributed to a dense nanoscale amorphous calcium carbonate phase. Calcite was found to be the major phase in the solid residue with vaterite as minor phase. |
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