Neeson Michael J, Chan Derek Y C, Tabor Rico F
Department of Mathematics and Statistics, University of Melbourne , Parkville 3010, Australia.
Langmuir. 2014 Dec 30;30(51):15388-91. doi: 10.1021/la504406m. Epub 2014 Dec 17.
A widely used method to determine the interfacial tension between fluids is to quantify the pendant drop shape that is determined by gravity and interfacial tension forces. Failure of this method for small drops or small fluid density differences is a critical limitation in microfluidic applications and when only small fluid samples are available. By adding a small spherical particle to the interface to apply an axisymmetric deformation, both the particle density and the interfacial tension can be simultaneously and precisely determined, providing an accurate and elegant solution to a long-standing problem.
一种广泛用于测定流体间界面张力的方法是量化由重力和界面张力决定的悬滴形状。对于小液滴或流体密度差小的情况，该方法失效是微流体应用中的一个关键限制，并且当只有少量流体样本可用时也是如此。通过在界面处添加一个小的球形颗粒以施加轴对称变形，可以同时精确测定颗粒密度和界面张力，为一个长期存在的问题提供了准确而巧妙的解决方案。
