Fluid flow through nanometer-scale channels
Fluid flow through nanometer-scale channels
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DOI：
10.1103/physreve.65.031206
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发表时间：
2002-03-01
影响因子：
2.4
通讯作者：
Giordano, N
中科院分区：
文献类型：
--
作者：
Cheng, JT;Giordano, N
我们描述了几种经典流体通过光刻产生的通道的压力驱动流动的研究，其中一个维度，通道高度h，在微米或纳米尺寸范围内。在假定沟道壁面无滑移边界条件下，将实测流量与理论预测流量进行了比较。水的结果与这一预测吻合得很好，小到40纳米（我们最小的通道）。然而，对于正己烷、癸烷、十六烷和硅油，当h减小到约100 nm以下时，我们发现与该理论存在偏差。小h时观察到的流量大于理论预期，这意味着壁面有明显的滑移，并估计了滑移长度的值。结果与以往的实验和理论工作进行了比较。
We describe studies of the pressure driven flow of several classical fluids through lithographically produced channels in which one dimension, the channel height h, is in the micron or nanometer size range. The measured flow rates are compared with theoretical predictions assuming no-slip boundary conditions at the walls of the channel. The results for water agree well with this prediction for h as small as 40 nm (our smallest channels). However, for hexane, decane, hexadecane, and silicone oil we find deviations from this theory when h is reduced below about 100 nm. The observed flow rates for small h are larger than theoretical expectations, implying significant slip at the walls, and values of the slip length are estimated. The results are compared with previous experimental and theoretical work.