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Download Hi-Res ImageDownload to MS-PowerPointCite This:J. Phys. Chem. Lett. 2021, 12, 33, 8039-8045
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High-Speed Atomic Force Microscopy of the Structure and Dynamics of Calcite Nanoscale Etch Pits

  • Kazuki Miyata*
    Kazuki Miyata
    Nano Life Science Institute (WPI-NanoLSI)  and  Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
    *Email: [email protected]
    More by Kazuki Miyata
    Orcidhttps://orcid.org/0000-0002-1641-2160
    • , 
  • Kazuyoshi Takeuchi
    Kazuyoshi Takeuchi
    Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
    More by Kazuyoshi Takeuchi
    • , 
  • Yuta Kawagoe
    Yuta Kawagoe
    Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
    More by Yuta Kawagoe
    • , 
  • Peter Spijker
    Peter Spijker
    Department of Applied Physics, Aalto University, Helsinki FI-00076, Finland
    More by Peter Spijker
    • , 
  • John Tracey
    John Tracey
    Department of Applied Physics, Aalto University, Helsinki FI-00076, Finland
    More by John Tracey
    • , 
  • Adam S. Foster*
    Adam S. Foster
    Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
    Department of Applied Physics, Aalto University, Helsinki FI-00076, Finland
    *Email: [email protected]
    More by Adam S. Foster
    Orcidhttps://orcid.org/0000-0001-5371-5905
    • , and 
  • Takeshi Fukuma*
    Takeshi Fukuma
    Nano Life Science Institute (WPI-NanoLSI)  and  Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
    *Email: [email protected]
    More by Takeshi Fukuma
    Orcidhttps://orcid.org/0000-0001-8971-6002
Cite this: J. Phys. Chem. Lett. 2021, 12, 33, 8039–8045
Publication Date (Web):August 17, 2021
https://doi.org/10.1021/acs.jpclett.1c02088
Copyright © 2021 American Chemical Society
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Abstract

Abstract Image

Calcite dissolution is initiated by the formation of a nanoscale etch pit followed by step edge propagation and hence strongly influenced by the interactions between surface diffusing ions and step edges. However, such atomic-scale dynamics are mostly inaccessible with current imaging tools. Here, we overcome this limitation by using our recent development of high-speed frequency modulation atomic force microscopy. By visualizing atomic-scale structural changes of the etch pits at the calcite surface in water, we found the existence of mobile and less-mobile surface adsorption layers (SALs) in the etch pits. We also found that some etch pits maintain their size for a long time without expansion, and their step edges are often associated with less-mobile SALs, suggesting their step stabilization effect.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpclett.1c02088.

  • Discussions on drift correction for Figure 1 with supplementary figures S1 and AFM speed required for imaging atomic-scale dynamics around dissolving step edges (PDF)

  • Movie1.mp4: Successive FM-AFM images of calcite surface obtained in water, 5 s/frame; four images were selected and are shown in Figure 1a (MP4)

  • Movie2.mp4: Successive FM-AFM images of calcite surface obtained in water, 2 s/frame; six images were selected and shown in Figure 2a (MP4)

  • Movie3.mp4: Successive FM-AFM images of calcite surface obtained in water, 2 s/frame; 12 images were selected and are shown in Figure 3b (MP4)

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