Metastable Underwater Superhydrophobicity
Metastable Underwater Superhydrophobicity
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DOI：
10.1103/physrevlett.105.166104
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发表时间：
2010-10-14
影响因子：
8.6
通讯作者：
Steiner, Ullrich
中科院分区：
文献类型：
--
作者：
Poetes, Rosa;Holtzmann, Kathrin;Steiner, Ullrich
超疏水性通常被认为是化学稳定的润湿状态。在水下实验中研究了胸甲（在超疏水状态下将基底与水分离的薄空气膜）的稳定性。胸甲表现出快速衰减后，一个定义明确的发病时间，这被认为是依赖于浸泡深度。解释了在一个模型，这是基于共聚焦显微镜测量的胸甲衰变。有限的水下胸甲稳定性解释了自然界中永久浸没的超疏水表面的罕见性，并限制了它们的商业应用范围。
Superhydrophobicity is generally considered to be a thermodynamically stable wetting state. The stability of the plastron (the thin air film separating the substrate from the water in the superhydrophobic state) was studied in underwater experiments. The plastron exhibited a rapid decay after a well defined onset time, which was found to be dependent on the immersion depth. The plastron decay is explained in terms of a model, which is based on confocal microscopy measurements. The limited underwater plastron stability explains the rarity of permanently submerged superhydrophobic surfaces in nature and limits their scope for commercial applications.