Distinct ice patterns on solid surfaces with various wettabilities
Distinct ice patterns on solid surfaces with various wettabilities
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DOI：
10.1073/pnas.1712829114
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发表时间：
2017-10-24
影响因子：
11.1
通讯作者：
Wang, Jianjun
中科院分区：
文献类型：
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作者：
Liu, Jie;Zhu, Chongqin;Wang, Jianjun
虽然冰经常在固体表面上形成，但表面润湿性和冰的生长模式之间没有关系。在这里，我们报告的实验观察使用专门设计的过程中，以避免成核的影响，并描述了在大气条件下的固体表面上的润湿性依赖的冰形态和冰晶的两种生长模式的发现：沿表面和离表面生长模式。使用原子分子动力学模拟分析，我们表明，这些独特的冰生长现象是由于存在的（或不存在）具有不同润湿性的固体表面上的双层冰;也就是说，由于双层六边形冰与六边形冰的基面（冰I-h）之间的结构匹配，在亲水表面上形成的双层冰可以决定沿表面生长模式，从而促进非基面沿着亲水表面的快速生长。固体表面上冰的生长模式截然不同，这与拒冰表面至关重要。
No relationship has been established between surface wettability and ice growth patterns, although ice often forms on top of solid surfaces. Here, we report experimental observations obtained using a process specially designed to avoid the influence of nucleation and describe the wettability-dependent ice morphology on solid surfaces under atmospheric conditions and the discovery of two growth modes of ice crystals: along-surface and off-surface growth modes. Using atomistic molecular dynamics simulation analysis, we show that these distinct ice growth phenomena are attributable to the presence (or absence) of bilayer ice on solid surfaces with different wettability; that is, the formation of bilayer ice on hydrophilic surface can dictate the along-surface growth mode due to the structural match between the bilayer hexagonal ice and the basal face of hexagonal ice (ice I-h), thereby promoting rapid growth of nonbasal faces along the hydrophilic surface. The dramatically different growth patterns of ice on solid surfaces are of crucial relevance to ice repellency surfaces.