Solid-state wetting on nano-patterned substrate
Solid-state wetting on nano-patterned substrate
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纳米图案基底上的固态润湿
DOI：
10.1016/j.crhy.2013.06.010
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Maxim Ignasco and Olivier Pierre-Louis
中科院分区：
文献类型：
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作者：
Yukio Saito;Maxim Ignasco and Olivier Pierre-Louis
我们回顾了最近的一些结果的形态异质外延覆盖层沉积在nanopatterned衬底表面。我们主要关注基于动力学蒙特卡罗（KMC）模拟的建模。在平行槽阵列或柱阵列上，我们发现了三种主要的状态，类似于已知的液体状态：（i）Cassie-Baxter状态，其中固体岛位于衬底结构的顶部;（ii）Wenzel状态，其中固体岛与衬底底部接触;和（iii）固体吸渗（也表示为平行凹槽的毛细填充），其中固体在衬底表面结构中形成膜。这种多稳定性由润湿性参数χ控制，并且形状转变表现出滞后。我们讨论了Cassie-Baxter态坍缩成Wenzel态和Wenzel态坍缩成吸胀膜的动力学过程。我们还讨论了在纳米图案化衬底上生长CB状态晶体的可能性。在生长过程中，CB状态下形成的晶体合并，导致连续的多晶覆盖层，其中晶粒的尺寸由柱之间的距离控制。
We review some recent results on the morphology of heteroepitaxial overlayers deposited on nanopatterned substrate surfaces. We mainly focus on modeling based on kinetic Monte Carlo (KMC) simulations. On arrays of parallel grooves or arrays of pillars, we find three main classes of states similar to those known for liquids: (i) Cassie–Baxter states, where solid islands sit on top of the substrate structure; (ii) Wenzel states, where solid islands are in contact with the bottom of the substrate; and (iii) solid imbibition (also denoted as capillary filling for parallel grooves), where the solid forms a film in the substrate surface structure. This multi-stability is controlled by the wettability parameterχ, and shape transitions exhibit hysteresis. We discuss the dynamics of the collapse of a Cassie–Baxter to Wenzel state, and the collapse of the Wenzel state to an imbibition film. We also discuss the possibility to grow crystals in the CB state on nanopatterned substrates. During growth, the crystals formed in CB state merge, leading to a continuous polycrystalline overlayer where the size of the grains is controlled by the distance between pillars.