Würger Alois, Foret Lionel
CPMOH, CNRS-Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France.
J Phys Chem B. 2005 Sep 1;109(34):16435-8. doi: 10.1021/jp052133i.
We study the capillary forces arising from charged colloidal particles trapped at an oil-water interface. Since it is quadratic in the electric field, the electric stress acting on the interface cannot be written as the superposition of one-particle terms. Indeed, we find that the interfacial pressure is dominated by two-particle terms, which induce capillary forces involving one, two, three, or four particles. The dominant interaction is attractive and varies with the inverse cube of the particle distance.
我们研究了被困在油水界面处的带电胶体颗粒产生的毛细作用力。由于其在电场中是二次方的，作用在界面上的电应力不能写成单粒子项的叠加。实际上，我们发现界面压力主要由双粒子项主导，这些双粒子项会引发涉及一个、两个、三个或四个粒子的毛细作用力。主要的相互作用是吸引性的，并且随粒子间距的立方反比变化。
