Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica  

作　　者：Hanqi Gong Chonghai Qi Junwei Yang Jige Chen Xiaoling Lei Liang Zhao Chunlei Wang 龚菡琪;齐崇海;杨俊伟;陈济舸;雷晓玲;赵亮;王春雷(Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Physics,Shandong University,Jinan 250100,China;School of Arts and Sciences,Shanghai Dianji University,Shanghai 201306,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Department of Physics,East China University of Science and Technology,Shanghai 200237,China;College of Physical Science and Technology,Yangzhou University,Jiangsu 225009,China)

机构地区：[1]Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Physics,Shandong University,Jinan 250100,China [4]School of Arts and Sciences,Shanghai Dianji University,Shanghai 201306,China [5]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [6]Department of Physics,East China University of Science and Technology,Shanghai 200237,China [7]College of Physical Science and Technology,Yangzhou University,Jiangsu 225009,China

出　　处：《Chinese Physics B》2021年第1期191-196,共6页中国物理B（英文版）

基　　金：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。

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.

关 键 词：lattice strain surface wettability embedded water hydrogen bonds 

分 类 号：O647.1[理学—物理化学] O641.3[理学—化学]