Liquid morphologies on structured surfaces: From microchannels to microchips
Liquid morphologies on structured surfaces: From microchannels to microchips
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DOI：
10.1126/science.283.5398.46
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发表时间：
1999-01-01
期刊：
影响因子：
56.9
通讯作者：
Lipowsky, R
中科院分区：
文献类型：
--
作者：
Gau, H;Herminghaus, S;Lipowsky, R
结构表面上的液体微通道是由疏水衬底上的亲水条纹组成的润湿性图案，在一定的吸附体积下，这些通道经历了从具有空间恒定截面的均匀状态到具有单一凸起的状态的形状不稳定性。这种不稳定性与经典的瑞利高原不稳定性有很大的不同，它代表了两种不同形态的常平均曲率之间的分叉。凸起状态可用于构建可用作流体微芯片或微反应器的通道网络。
Liquid microchannels on structured surfaces are built up using a wettability pattern consisting of hydrophilic stripes on a hydrophobic substrate, These channels undergo a shape instability at a certain amount of adsorbed volume, from a homogeneous state with a spatially constant cross section to a state with a single bulge. This instability is quite different from the classical Rayleigh Plateau instability and represents a bifurcation between two different morphologies of constant mean curvature. The bulge state can be used to construct channel networks that could be used as fluid microchips or microreactors.