Schebarchov D, Hendy S C
School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6001, New Zealand.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Oct;78(4 Pt 2):046309. doi: 10.1103/PhysRevE.78.046309. Epub 2008 Oct 16.
We consider the capillary absorption of liquid metal droplets by carbon nanotubes using molecular dynamics simulations and the steady-state flow model due to Marmur [A. Marmur, J. Colloid Interface Sci. 122, 209 (1988)]. We find an exact solution to Marmur's evolution equation for the height of the absorbed liquid column as a function of time, and show that this reproduces the dynamics observed in the simulations well. The simulations show that the flow of the metal exhibits a large degree of slippage at the tube walls, with slip lengths of up to 10 nm depending on the wettability of the nanotube. The results support the use of the Lucas-Washburn approach for modeling capillary absorption at the nanoscale.
我们使用分子动力学模拟和基于马尔穆尔[A. Marmur, J. Colloid Interface Sci. 122, 209 (1988)]的稳态流动模型，研究了碳纳米管对液态金属微滴的毛细吸收。我们找到了马尔穆尔演化方程中吸收液柱高度随时间变化的精确解，并表明该解能很好地重现模拟中观察到的动力学过程。模拟结果表明，金属的流动在管壁处表现出很大程度的滑移，滑移长度可达10纳米，这取决于纳米管的润湿性。这些结果支持使用卢卡斯 - 沃什伯恩方法对纳米尺度的毛细吸收进行建模。
