Rapid retraction of microvolume aqueous plugs traveling in a wettable capillary
Rapid retraction of microvolume aqueous plugs traveling in a wettable capillary
复制标题
DOI：
10.1063/1.4932956
复制
发表时间：
2015-10-05
影响因子：
4
通讯作者：
Vunjak-Novakovic, Gordana
中科院分区：
文献类型：
--
作者：
Kim, Jinho;O'Neill, John D.;Vunjak-Novakovic, Gordana
我们报告的运输行为，特别是，快速回缩运动的小（类似于亩L）去离子水塞旅行系列内的一个小的无菌管状几何形状。在这项研究中，两个水栓分开一定的距离，在干燥的圆柱形玻璃毛细管被移动的正压气流施加在管入口。当塞行进时，由于前导塞的水沉积到管的内表面上，在塞之间产生薄的水膜。先导栓塞通过在表面上的膜沉积而不断地损失体积，并最终破裂。然后，滞后的塞子快速移动最初分开两个塞子的距离（塞子缩回）。我们的研究表明，滞后塞的快速回缩是由表面张力引起的，除了施加的正压力。此外，管半径和塞之间的距离强烈地影响塞的缩回速度。(C)2015 AIP Publishing LLC.
We report a transport behavior-specifically, rapid retraction movement-of small (similar to mu L) deionized water plugs traveling in series within a small wettable tubular geometry. In this study, two water plugs separated by a certain distance in a dry cylindrical glass capillary were moved by positive pressure airflow applied at the tube inlet. As the plugs travel, a thin aqueous film is generated between the plugs as a result of the leading plug's aqueous deposition onto the inner surface of the tube. The leading plug continuously loses volume by film deposition onto the surface and eventually ruptures. Then, the lagging plug quickly travels the distance initially separating the two plugs (plug retraction). Our studies show that the rapid retraction of the lagging plug is caused by surface tension in addition to the positive pressure applied. Furthermore, the plug retraction speed is strongly affected by tube radius and the distance between the plugs. (C) 2015 AIP Publishing LLC.