Sakuma Hiroshi, Otsuki Kenshiro, Kurihara Kazue
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University and CREST (JST), Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan.
Phys Rev Lett. 2006 Feb 3;96(4):046104. doi: 10.1103/PhysRevLett.96.046104.
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.
我们报告了用剪切共振仪测量的云母表面间受限的氯化钠水溶液薄膜的粘弹性。在间距小于约2纳米时观察到的剪切共振曲线表明，该溶液在某些负载下表现出高润滑效果。从力学模型获得的间距小于1纳米时的有效粘度（0.1 - 10帕斯卡·秒）比本体值大2 - 4个数量级。我们采用新型剪切测量方法的研究为几纳米以下受限水的动力学提供了全面的图景。
