Atomic-resolution three-dimensional hydration structures on a heterogeneously charged surface

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Details

Original languageEnglish
Article number2111
Pages (from-to)1-9
JournalNature Communications
Volume8
Issue number1
Publication statusPublished - 1 Dec 2017
MoE publication typeA1 Journal article-refereed

Researchers

  • Kenichi Umeda
  • Lidija Zivanovic
  • Kei Kobayashi
  • Juha Ritala
  • Hiroaki Kominami
  • Peter Spijker
  • Adam Foster

  • Hirofumi Yamada

Research units

  • Kyoto University
  • University of Tokyo
  • Kanazawa University

Abstract

Local hydration structures at the solid-liquid interface around boundary edges on heterostructures are key to an atomic-level understanding of various physical, chemical and biological processes. Recently, we succeeded in visualising atomic-scale three-dimensional hydration structures by using ultra-low noise frequency-modulation atomic force microscopy. However, the time-consuming three-dimensional-map measurements on uneven heterogeneous surfaces have not been achieved due to experimental difficulties, to the best of our knowledge. Here, we report the local hydration structures formed on a heterogeneously charged phyllosilicate surface using a recently established fast and nondestructive acquisition protocol. We discover intermediate regions formed at step edges of the charged surface. By combining with molecular dynamics simulations, we reveal that the distinct structural hydrations are hard to observe in these regions, unlike the charged surface regions, possibly due to the depletion of ions at the edges. Our methodology and findings could be crucial for the exploration of further functionalities.

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