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    Resolving Point Defects in the Hydration Structure of Calcite (10.4) with Three-Dimensional Atomic Force Microscopy

    265683.pdf (5.249Mb)
    Access Status
    Open access
    Authors
    Söngen, H.
    Reischl, Bernhard
    Miyata, K.
    Bechstein, R.
    Raiteri, Paolo
    Rohl, Andrew
    Gale, Julian
    Fukuma, T.
    Kühnle, A.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Söngen, H. and Reischl, B. and Miyata, K. and Bechstein, R. and Raiteri, P. and Rohl, A. and Gale, J. et al. 2018. Resolving Point Defects in the Hydration Structure of Calcite (10.4) with Three-Dimensional Atomic Force Microscopy. Physical Review Letters. 120 (11): Article ID 116101.
    Source Title
    Physical Review Letters
    DOI
    10.1103/PhysRevLett.120.116101
    ISSN
    0031-9007
    School
    Nanochemistry Research Institute
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP140101776
    http://purl.org/au-research/grants/arc/FT130100463
    Remarks

    © 2018 American Physical Society

    URI
    http://hdl.handle.net/20.500.11937/67232
    Collection
    • Curtin Research Publications
    Abstract

    It seems natural to assume that defects at mineral surfaces critically influence interfacial processes such as the dissolution and growth of minerals in water. The experimental verification of this claim, however, is challenging and requires real-space methods with utmost spatial resolution, such as atomic force microscopy (AFM). While defects at mineral-water interfaces have been resolved in 2D AFM images before, the perturbation of the surrounding hydration structure has not yet been analyzed experimentally. In this Letter, we demonstrate that point defects on the most stable and naturally abundant calcite (10.4) surface can be resolved using high-resolution 3D AFM - even within the fifth hydration layer. Our analysis of the hydration structure surrounding the point defect shows a perturbation of the hydration with a lateral extent of approximately one unit cell. These experimental results are corroborated by molecular dynamics simulations.

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