Publication: Systematic study of the dolomite (104)
surface by bimodal dynamic force
microscopy in ultra-high vacuum
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Publication Date
2013
Authors
Kawai, Shigeki
Bubendorf, Alexander
Fessler, Gregor
Glatzel, Thilo
Gnecco, Enrico
Meyer, Ernest
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Iop Publishing Ltd
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Abstract
We have investigated the morphology and structure of dolomite MgCa.CO3/2.104/ surfaces by bimodal dynamic force microscopy with flexural and torsional resonance modes in ultra-high vacuum at room temperature. We found that the surface slowly decomposes by degassing CO2 in a vacuum and becomes covered by amorphous clusters, presumably MgO and CaO. By choosing an optimal sample preparation procedure (i.e. cleaving in a vacuum and mild annealing for stabilizing clusters for a short time), atomically clean surfaces were obtained. The complex tip–sample interaction, arising from carbonate groups and Mg and Ca atoms of the surface, induces a large variety of atomic- cale imaging features.