Filling dynamics of closed end nanocapillaries.
Filling dynamics of closed end nanocapillaries.
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DOI：
10.1021/la404456e
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
D. Schneider;R. Valiullin;P. A. Monson
中科院分区：
文献类型：
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作者：
D. Schneider;R. Valiullin;P. A. Monson
我们使用受限晶格气的动态平均场理论和川崎动力学模拟研究了模型毛细管的填充动力学。我们已经发现了两种不同的情况下，从气相填充的加盖纳米胶囊。与具有宏观宽度的通道相比，其中填充过程通过弯月面从盖脱离而发生，在介观通道中，存在与靠近孔开口的液体的自发冷凝及其随后朝向封闭孔端的生长相关的替代机制。我们表明，这两种情况下有完全不同的填充动力学，提供了一个额外的机制，在纳米级物体的缓慢毛细凝聚动力学。
We have studied the filling dynamics of model capillaries using dynamic mean field theory for a confined lattice gas and Kawasaki dynamics simulations. We have found two different scenarios for filling of capped nanocapillaries from the vapor phase. As compared to channels with macroscopic width, in which the filling process occurs by the detachment of the meniscus from the cap, in mesoscopic channels there is an alternative mechanism associated with the spontaneous condensation of the liquid close to the pore opening and its subsequent growth toward the closed pore end. We show that these two scenarios have totally different filling dynamics, providing an additional mechanism for slow capillary condensation kinetics in nanoscopic objects.