Coarsening dynamics of dewetting nanodroplets on chemically patterned substrates.
Coarsening dynamics of dewetting nanodroplets on chemically patterned substrates.
复制标题
化学图案基底上纳米液滴去湿的粗化动力学。
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Ali Moosavi
中科院分区：
文献类型：
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作者：
M. Asgari;Ali Moosavi
求解了介观流体力学方程，研究了两个纳米液滴在化学图案衬底上相互作用的粗化动力学。研究了表面化学模式、滑移长度、分离压力分布、液滴尺寸和接触角等参数对粗化的影响。我们的研究结果表明，化学非均质性的存在可以增强或减弱粗化动力学，这取决于液滴在衬底上的模式类型和位置。此外，将接触角增加到大于临界值的值可能会定性地改变粗化过程，并且分离压力和滑移的分布可以明显地改变粗化速率。
Mesoscopic hydrodynamic equations are solved to investigate coarsening dynamics of two interacting nanodroplets on chemically patterned substrates. The effects of different parameters such as the surface chemical pattern, the slip length, the profile of the disjoining pressure, the size of the droplets, and the contact angles on the coarsening are studied. Our results reveal that the presence of a chemical heterogeneity can enhance or weaken the coarsening dynamics depending on the pattern type and positions of the droplets on the substrate. Also increasing the contact angles to values larger than a critical value may qualitatively change the coarsening process, and the profile of the disjoining pressure and the slippage can appreciably modify the coarsening rate.