Dynamical instability of thin liquid films between conducting media
Dynamical instability of thin liquid films between conducting media
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DOI：
10.1103/physrevlett.83.2359
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发表时间：
1999-09-20
影响因子：
8.6
通讯作者：
Herminghaus, S
中科院分区：
文献类型：
--
作者：
Herminghaus, S
研究表明，如果导电介质的电子功函数不同，导电介质之间的薄介电液体薄膜是动态不稳定的。因此，预计它们会通过旋节线去湿的方式去湿，即通过具有模式选择的表面波的放大。讨论了增长最快模式的波数与电场力和色散力强度的函数关系。与人们普遍认为的情况相反，在此研究的相当普遍类型的大多数实验情形中，电场力在与色散力的比较中占主导地位。
It is shown that thin dielectric liquid films between electrically conducting media are dynamically unstable if the electronic work functions of the conductors are different. As a consequence, they are expected to dewet by a spinodal dewetting scenario, i.e., via amplification of surface waves with mode selection. The wave number of the fastest growing mode is discussed as a function of the strength of the electric and dispersive forces. In contrast to what seems to be widely believed, it turns out that electric forces dominate over dispersive forces in most experimental situations of the rather general type studied here.