论文标题
在液体中的单个纳米颗粒上的Navier滑移的测量
The measurement of Navier slip on individual nanoparticles in liquid
论文作者
论文摘要
Navier滑动条件描述了相对于相邻固体表面的液体运动的运动，其特征性Navier滑动长度是固定液体界面的本构特性。基于分子模拟的纳米范围内预期，该滑动长度的测量很小。在这里，我们报告了一种实验技术，该技术询问了浸入液体中的单个纳米颗粒上的Navier滑动长度，并具有亚纳米计精度。水中的单个，柠檬酸盐稳定的金纳米颗粒的原则实验可使恒定滑移长度为2.7 $ \ pm $ 0.6 nm（95％c.i.） - 独立于粒径。实现大小独立性的这一特征对于该本构特性的任何测量都至关重要，该特性通过使用不同半径的单个颗粒来促进。该演示促进了现在可以验证Slip上现有分子模拟数据的财富的研究。
The Navier slip condition describes the motion of a liquid, relative to a neighboring solid surface, with its characteristic Navier slip length being a constitutive property of the solid-liquid interface. Measurement of this slip length is complicated by its small magnitude, expected in the nanometer range based on molecular simulations. Here, we report an experimental technique that interrogates the Navier slip length on individual nanoparticles immersed in liquid, with sub-nanometer precision. Proof-of-principle experiments on individual, citrate-stabilized, gold nanoparticles in water give a constant slip length of 2.7$\pm$0.6 nm (95% C.I.) - independent of particle size. Achieving this feature of size independence is central to any measurement of this constitutive property, which is facilitated through the use of individual particles of varying radii. This demonstration motivates studies that can now validate the wealth of existing molecular simulation data on slip.
