We report on the thinning mechanisms of supported films of surfactant $\left(n\mathrm{TAB}\right)$ solutions above the critical micellar concentration. The films are formed by pressing an oil drop immersed in an aqueous surfactant solution on a silica surface. Depending on the length of the carbon chain of the surfactant and its concentration, two modes of destabilization of the stratified films are observed. The first one proceeds by heterogeneous nucleation, characterized by the lateral expansion of the domain of lower thickness as evidenced long ago in suspended micellar films. In addition, the simultaneous stepwise thinning of several domains, called spinodal stratification, is observed here in supported films. We measure the time evolution of the thickness of the films, and we discuss the selection mechanism of each destabilization mode.

中文翻译：

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油和二氧化硅之间的胶束膜中的节线形分层

我们报告了表面活性剂负载膜的减薄机理 $（ñ\mathrm{标签}）$高于临界胶束浓度的溶液。通过将浸渍在表面活性剂水溶液中的油滴压在二氧化硅表面上来形成膜。取决于表面活性剂的碳链的长度及其浓度，观察到分层膜的两种去稳定模式。第一个过程是通过异质形核进行的，其特征是较低厚度区域的横向扩展，这在很早以前就已在悬浮的胶束薄膜中得到证明。另外，在支撑薄膜中观察到几个区域的同时逐步变薄，称为旋节线分层。我们测量了薄膜厚度的时间演变，并讨论了每种去稳定模式的选择机理。