文献类型：期刊文献

英文题名：Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica*

作者：Gong, Hanqi[1,2,3];Qi, Chonghai[1,2,4];Yang, Junwei[5];Chen, Jige[1,2,6];Lei, Xiaoling[7];Zhao, Liang[8];Wang, Chunlei[1,2,6]

机构：[1]Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[4]Shandong Univ, Sch Phys, Jinan 250100, Peoples R China;[5]Shanghai Dianji Univ, Sch Arts & Sci, Shanghai 201306, Peoples R China;[6]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China;[7]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[8]Yangzhou Univ, Coll Phys Sci & Technol, Yangzhou 225009, Jiangsu, Peoples R China

年份：2021

卷号：30

期号：1

外文期刊名：CHINESE PHYSICS B

收录：;EI(收录号：20210309768935);WOS:【SCI-EXPANDED(收录号:WOS:000605079700001)】；

语种：英文

外文关键词：lattice strain; surface wettability; embedded water; hydrogen bonds

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 beta-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 degrees) 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.