Viscosity and Lubricity of Aqueous NaCl Solution Confined between Mica Surfaces Studied by Shear Resonance Measurement

Hiroshi Sakuma, Kenshiro Otsuki, and Kazue Kurihara
Phys. Rev. Lett. 96, 046104 – Published 3 February 2006

Abstract

We report the viscoelasticity of the thin film of aqueous NaCl solution confined between mica surfaces measured by shear resonance apparatus. The observed shear resonance curves at separations less than ca. 2 nm indicated that the solution exhibits the high lubrication effects under some loads. The effective viscosity (0.110Pas) obtained for the separations less than 1 nm from a mechanical model was 2–4 orders of magnitude larger than the bulk value. Our study employing a novel shear measurement provided a comprehensive picture for the dynamics of confined water thinner than a few nanometers.

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  • Received 17 March 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.046104

©2006 American Physical Society

Authors & Affiliations

Hiroshi Sakuma1,2, Kenshiro Otsuki2, and Kazue Kurihara1,*

  • 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University and CREST (JST), Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
  • 2Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan

  • *Electronic address: kurihara@tagen.tohoku.ac.jp

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Vol. 96, Iss. 4 — 3 February 2006

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