中国物理B ›› 2021, Vol. 30 ›› Issue (1): 10503-.doi: 10.1088/1674-1056/abc2b7

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  • 收稿日期:2020-08-27 修回日期:2020-09-29 接受日期:2020-10-20 出版日期:2020-12-17 发布日期:2020-12-23

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

Hanqi Gong(龚菡琪)1,2,†, Chonghai Qi(齐崇海)1,3,†, Junwei Yang(杨俊伟)4, Jige Chen(陈济舸)1,5, Xiaoling Lei(雷晓玲)6,‡, Liang Zhao(赵亮)7,§, and Chunlei Wang(王春雷)1,5,¶   

  1. 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
  • Received:2020-08-27 Revised:2020-09-29 Accepted:2020-10-20 Online:2020-12-17 Published:2020-12-23
  • Contact: † These authors contributed equally to this work. ‡ Corresponding author. E-mail: leixiaoling@ecust.edu.cn §Corresponding author. E-mail: zhaoliang@yzu.edu.cn Corresponding author. E-mail: wangchunlei@zjlab.org.cn
  • Supported by:
    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), and the Fundamental Research Funds for the Central Universities, China.

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Abstract: 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.

Key words: lattice strain, surface wettability, embedded water, hydrogen bonds

中图分类号:  (Classical statistical mechanics)

  • 05.20.-y
05.70.Np (Interface and surface thermodynamics) 05.90.+m (Other topics in statistical physics, thermodynamics, and nonlinear dynamical systems)