| Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica |
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| 引用本文： | 龚菡琪,齐崇海,杨俊伟,陈济舸,雷晓玲,赵亮,王春雷.Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica[J].中国物理 B,2021(1). |
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| 作者姓名： | 龚菡琪 齐崇海 杨俊伟 陈济舸 雷晓玲 赵亮 王春雷 |
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| 作者单位： | Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology;University of Chinese Academy of Sciences;School of Physics;School of Arts and Sciences;Shanghai Advanced Research Institute;Department of Physics;College of Physical Science and Technology |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No.11674345);the Key Research Program of Chinese Academy of Sciences(Grant No. QYZDJ-SSW-SLH019);the Fundamental Research Funds for the Central Universities,China。 |
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| 摘 要： | Using molecular dynamics simulations, we have revealed a novel wetting phenomenon with a droplet on composite structures formed by embedded water into(111) surface of β-cristobalite hydroxylated silica. This can be attributed to the formation of a composite structure composed of embedded water molecules and the surface hydroxyl(–OH) groups,which reduces the number of hydrogen bonds between the composite structure and the water droplet above the composite structure. Interestingly, a small uniform strain(±3%) applied to the crystal lattice of the hydroxylated silica surface can result in a notable change of the contact angles(> 40°) on the surface. The finding provides new insights into the correlation between the molecular-scale interfacial water structures and the macroscopic wettability of the hydroxylated silica surface.
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| 关 键 词： | lattice strain surface wettability embedded water hydrogen bonds |
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