Viscosity and lubricity of aqueous NaCl solution confined between mica surfaces studied by shear resonance measurement

被引：127
|
作者：
Sakuma, H
Otsuki, K
Kurihara, K
机构：
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] JST, CREST, Aoba Ku, Sendai, Miyagi 9808577, Japan
[3] Tohoku Univ, Grad Sch Sci, Inst Geol & Palaeontol, Aoba Ku, Sendai, Miyagi 9808578, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.96.046104
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 (0.1-10 Pa s) 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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