True Atomic-Resolution Imaging of (10(1)over-bar4) Calcite in Aqueous Solution by Frequency Modulation Atomic Force Microscopy

Autor(en): Rode, Sebastian
Oyabu, Noriaki
Kobayashi, Kei
Yamada, Hirofumi
Kuehnle, Angelika
Stichwörter: AFM; AMINO-ACIDS; Chemistry; Chemistry, Multidisciplinary; Chemistry, Physical; CLEAVAGE PLANE; DISSOLUTION; DYNAMICS; GROWTH; IMAGES; INHIBITION; Materials Science; Materials Science, Multidisciplinary; PRECIPITATION; SURFACE
Erscheinungsdatum: 2009
Volumen: 25
Ausgabe: 5
Startseite: 2850
Seitenende: 2853
Calcite (CaCO3) is one of the most abundant minerals on earth and plays an important role in a wide range of different fields including, for example, biomineralization and environmental geochemistry. Consequently, surface processes and reactions such as dissolution and growth as well as (macro)molecule adsorption are of greatest interest for both applied as well as fundamental research. An in-depth understanding of these processes requires knowledge about the detailed surface structure in its natural state which is quite often a liquid environment. We have studied the most stable cleavage plane of calcite under liquid conditions using frequency modulation atomic force microscopy. Using this technique, we achieved true atomic-resolution imaging, demonstrating the high-resolution capability of frequency modulation atomic force microscopy in liquids. We could reproduce contrast features reported before using contact mode atomic force microscopy, originating from the protruding oxygen atom of the carbonate groups. Besides this contrast, however, our results, indeed, indicate that we obtain more detailed structural information, revealing the calcium sublattice of the (10 (1) over bar4) cleavage plane.
ISSN: 07437463
DOI: 10.1021/la803448v

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