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Huaiyu Chen

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Water Nanochannels in Ultrathin Clinochlore Phyllosilicate Mineral with Ice-like Behavior

Author

  • Raphaela de Oliveira
  • Luisa V.C. Freitas
  • Helio Chacham
  • Raul O. Freitas
  • Roberto L. Moreira
  • Huaiyu Chen
  • Susanna Hammarberg
  • Jesper Wallentin
  • Gilberto Rodrigues-Junior
  • Lucas A.B. Marçal
  • Guilherme A. Calligaris
  • Alisson R. Cadore
  • Klaus Krambrock
  • Ingrid D. Barcelos
  • Angelo Malachias
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Summary, in English

Water is the matrix of life, and its confinement in nanocavities is a central topic from geophysics to nanotribology. Phyllosilicate layered minerals provide natural nanocavities for water due to their capacity to hydrate by confining water molecules in the interlamellar space. However, the hydration of phyllosilicates at the nanoscale is not a fully understood process and depends on the geological specimens. In this work, we report the formation of aqueous nanochannels in the interlamellar space of ultrathin clinochlore phyllosilicate mineral using infrared scattering-type scanning near-field optical microscopy and Kelvin probe force microscopy. We demonstrate that nanoconfinement of water in clinochlore changes the overall mechanical, optical, and dielectric properties of the system. We propose a capacitive model that describes the dielectric response of the aqueous nanochannels. Our model is endorsed by a robust crystal truncation rod analysis of synchrotron X-ray diffraction data. We found that clinochlore termination combines hydrated structures ordered along the c-axis. We also find evidence of ice-like behavior of the water nanoconfined in clinochlore by Fourier-transform infrared spectroscopy. Notably, our work introduces clinochlore as a natural platform for water confinement in two-dimensional systems that can be engineered for several applications in the frontiers of nanotechnology.

Department/s

  • LU Profile Area: Light and Materials
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • eSSENCE: The e-Science Collaboration
  • NanoLund: Centre for Nanoscience
  • Synchrotron Radiation Research
  • LTH Profile Area: Photon Science and Technology

Publishing year

2024

Language

English

Pages

14388-14398

Publication/Series

Journal of Physical Chemistry C

Volume

128

Issue

34

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Physical Chemistry (including Surface- and Colloid Chemistry)

Status

Published

ISBN/ISSN/Other

  • ISSN: 1932-7447