Detecting the sub-states of grating superhydrophobic surfaces with naked eyes
Detecting the sub-states of grating superhydrophobic surfaces with naked eyes
复制标题
肉眼检测光栅超疏水表面的亚状态
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
C. Kim
中科院分区：
文献类型：
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作者：
N. Yu;C. Kim
我们提出了一种方便的方法来检测光栅型超疏水（SHPo）表面在水中的详细润湿状态。虽然银色的胸甲使非润湿状态很容易从看起来黑色的润湿状态中辨别出来，但到目前为止，如果没有诸如共聚焦显微镜之类的特殊技术，非润湿状态的各种子状态是无法区分的。然而，对于某些应用，非润湿状态内的不同子状态可能具有显著不同的效果。应用于减阻实验，本文首次提出了一种用肉眼观察光栅SHPo表面甲片亚状态的方法。通过用光学显微镜观察浸没表面上的液-气界面，证实了这一结果。
We propose a convenient method to detect the detailed wetting states of grating-type superhydrophobic (SHPo) surfaces under water. Although the silvery plastron makes the nonwetted state easily discernable from the wetted, which appears black, various sub-states of the nonwetted state have so far been indistinguishable without special techniques such as confocal microscopy. For certain applications, however, different sub-states within the nonwetted state may have dramatically different effects. Applied for drag reduction experiments, here we develop an observation strategy that reveals the sub-states of plastron on grating SHPo surface to naked eyes for the first time. The results are confirmed by visualizing the liquid-air interfaces on the submerged surface with optical microscope.