Surfactant self-assembly near contact lines: Control of advancing surfactant solutions
Surfactant self-assembly near contact lines: Control of advancing surfactant solutions
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DOI：
10.1016/0927-7757(96)03622-9
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发表时间：
1996-09-16
影响因子：
5.2
通讯作者：
Garoff, S
中科院分区：
文献类型：
--
作者：
Frank, B;Garoff, S
当衬底浸入强吸附表面活性剂的溶液中时，接触线沿表面向前跳动。如果把一滴溶液放在表面上，它就会自动移动。我们已经直接观察到了导致这种行为的接触线前面的表面活性剂结构。这种吸附的、自组装的结构显示出两个具有不同时间演化的区域。我们可以将这些区域的发展和接触线的行为与系统中表面能量的演变联系起来。此外，我们可以将这些类型的组装的形成与观察到的弱吸附表面活性剂的树枝状扩散行为的变化相关联。这项研究使我们能够明确控制表面活性剂溶液润湿和铺展行为的分子尺度机制。
When a substrate is immersed into a solution of strongly adsorbing surfactant, the contact line advances by jumping forward along the surface. If a drop of the solution is placed on the surface, it autophobes. We have directly observed the surfactant structure ahead of the contact line which causes this behavior. This adsorbed, self-assembled structure exhibits two regions with distinct time evolutions. We can relate the development of these regions and the behavior of the contact line to the evolution of surface energies in the system. Additionally, we can relate the formation of these types of assemblies to the changes in the dendritic spreading behavior observed for a weakly adsorbing surfactant. This study enables us to specify molecular-scale mechanisms governing the wetting and spreading behavior of surfactant solutions.