Calcium Carbonate Mineralization: X-ray Microdiffraction Probing of the Interface of an Evaporating Drop on a Superhydrophobic Surface

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• 作者：Angelo Accardo ; Manfred Burghammer ; Emanuela Di Cola ; Michael Reynolds ; Enzo Di Fabrizio ; Christian Riekel
• 刊名：Langmuir
• 出版年：2011
• 出版时间：July 5, 2011
• 年：2011
• 卷：27
• 期：13
• 页码：8216-8222
• 全文大小：979K
• 年卷期：v.27,no.13(July 5, 2011)
• ISSN：1520-5827

文摘

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.