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We use atomic-resolution scanning transmission electron microscopy to investigate ion exchange dynamics and find individual ion binding sites in atomically thin and artificially restacked clays and micas. The ion diffusion coefficient for the interlayer space of atomically thin samples is up to 104 times larger than in bulk crystals and approaches its value in free water. Both atomically thin and restacked materials, we attribute the rapid ion diffusion to increased interlayer expandability resulting from weaker interlayer binding forces.
Source link: https://doi.org/10.1038/s41563-021-01072-6
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