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Resolving the intrinsic short-range ordering of K+ ions on cleaved muscovite mica

Author

Listed:
  • Giada Franceschi

    (Institute of Applied Physics, TU Wien)

  • Pavel Kocán

    (Charles University)

  • Andrea Conti

    (Institute of Applied Physics, TU Wien)

  • Sebastian Brandstetter

    (Institute of Applied Physics, TU Wien)

  • Jan Balajka

    (Institute of Applied Physics, TU Wien)

  • Igor Sokolović

    (Institute of Applied Physics, TU Wien)

  • Markus Valtiner

    (Institute of Applied Physics, TU Wien)

  • Florian Mittendorfer

    (Institute of Applied Physics, TU Wien)

  • Michael Schmid

    (Institute of Applied Physics, TU Wien)

  • Martin Setvín

    (Institute of Applied Physics, TU Wien
    Charles University)

  • Ulrike Diebold

    (Institute of Applied Physics, TU Wien)

Abstract

Muscovite mica, KAl2(Si3Al)O10(OH)2, is a common layered phyllosilicate with perfect cleavage planes. The atomically flat surfaces obtained through cleaving lend themselves to scanning probe techniques with atomic resolution and are ideal to model minerals and clays. Despite the importance of the cleaved mica surfaces, several questions remain unresolved. It is established that K+ ions decorate the cleaved surface, but their intrinsic ordering – unaffected by the interaction with the environment – is not known. This work presents clear images of the K+ distribution of cleaved mica obtained with low-temperature non-contact atomic force microscopy (AFM) under ultra-high vacuum (UHV) conditions. The data unveil the presence of short-range ordering, contrasting previous assumptions of random or fully ordered distributions. Density functional theory (DFT) calculations and Monte Carlo simulations show that the substitutional subsurface Al3+ ions have an important role for the surface K+ ion arrangement.

Suggested Citation

  • Giada Franceschi & Pavel Kocán & Andrea Conti & Sebastian Brandstetter & Jan Balajka & Igor Sokolović & Markus Valtiner & Florian Mittendorfer & Michael Schmid & Martin Setvín & Ulrike Diebold, 2023. "Resolving the intrinsic short-range ordering of K+ ions on cleaved muscovite mica," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-35872-y
    DOI: 10.1038/s41467-023-35872-y
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    References listed on IDEAS

    as
    1. Maria Ricci & Peter Spijker & Kislon Voïtchovsky, 2014. "Water-induced correlation between single ions imaged at the solid–liquid interface," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    2. Daniel Martin-Jimenez & Enrique Chacon & Pedro Tarazona & Ricardo Garcia, 2016. "Atomically resolved three-dimensional structures of electrolyte aqueous solutions near a solid surface," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
    3. Sang Soo Lee & Paul Fenter & Kathryn L. Nagy & Neil C. Sturchio, 2017. "Real-time observation of cation exchange kinetics and dynamics at the muscovite-water interface," Nature Communications, Nature, vol. 8(1), pages 1-9, August.
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