Yang C, Tartaglino U, Persson B N J
IFF, FZ-Jülich, 52425 Jülich, Germany.
Phys Rev Lett. 2006 Sep 15;97(11):116103. doi: 10.1103/PhysRevLett.97.116103. Epub 2006 Sep 14.
Superhydrophobic surfaces, with a liquid contact angle theta greater than 150 degrees , have important practical applications ranging from self-cleaning window glasses, paints, and fabrics to low-friction surfaces. Many biological surfaces, such as the lotus leaf, have a hierarchically structured surface roughness which is optimized for superhydrophobicity through natural selection. Here we present a molecular dynamics study of liquid droplets in contact with self-affine fractal surfaces. Our results indicate that the contact angle for nanodroplets depends strongly on the root-mean-square surface roughness amplitude but is nearly independent of the fractal dimension D(f) of the surface.
具有大于150度的液体接触角θ的超疏水表面，具有从自清洁窗玻璃、涂料和织物到低摩擦表面等重要的实际应用。许多生物表面，如荷叶，具有分层结构的表面粗糙度，通过自然选择优化以实现超疏水性。在这里，我们展示了与自仿射分形表面接触的液滴的分子动力学研究。我们的结果表明，纳米液滴的接触角强烈依赖于均方根表面粗糙度幅度，但几乎与表面的分形维数D(f)无关。
