High-Speed Atomic Force Microscopy of the Structure and Dynamics of Calcite Nanoscale Etch Pits

Kazuki Miyata, Kazuyoshi Takeuchi, Yuta Kawagoe, Peter Spijker, John Tracey, Adam S. Foster*, Takeshi Fukuma

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)8039-8045
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume12
Issue number33
DOIs
Publication statusPublished - 26 Aug 2021
MoE publication typeA1 Journal article-refereed

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