Is the lotus leaf superhydrophobic?
Is the lotus leaf superhydrophobic?
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DOI：
10.1063/1.1895487
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发表时间：
2005-04-04
影响因子：
4
通讯作者：
Rodak, DE
中科院分区：
文献类型：
--
作者：
Cheng, YT;Rodak, DE
超疏水表面具有重要的技术应用，从自清洁窗户玻璃，油漆和织物到低摩擦表面。超疏水表面的原型是荷叶。当雨水福尔斯落在荷叶上时，水珠的接触角在大约160度的超疏水范围内。水滴迅速地从树叶上滚落下来，沿途沿着泥土。近年来，这种莲花效应在世界范围内激发了许多研究工作，在制造具有超疏水性的表面。但是，莲花表面真的是超疏水的吗？这项工作表明，荷叶可以是疏水或亲水的，这取决于水如何到达它们的表面。这一发现对如何制造和使用超疏水表面具有重要意义。(C)2005年美国物理学会。
Superhydrophobic surfaces have important technical applications ranging from self-cleaning window glasses, paints, and fabrics to low-friction surfaces. The archetype superhydrophobic surface is that of the lotus leaf. When rain falls on lotus leaves, water beads up with a contact angle in the superhydrophobic range of about 160 degrees. The water drops promptly roll off the leaves collecting dirt along the way. This lotus effect has, in recent years, stimulated much research effort worldwide in the fabrication of surfaces with superhydrophobicity. But, is the lotus surface truly superhydrophobic? This work shows that the lotus leaves can be either hydrophobic or hydrophilic, depending on how the water gets on to their surfaces. This finding has significant ramifications on how to make and use superhydrophobic surfaces. (C) 2005 American Institute of Physics.