Effect of Na and Cl ions on water evaporation on graphene oxide

  • Xi Nan
  • Yu-Wei Guo
  • Rong-Zheng WanEmail author


Using molecular dynamics simulations, we investigate the influence of Na and Cl ions on the evaporation of nanoscale water on graphene oxide surfaces. As the concentration of NaCl increases from 0 to 1.5 M, the evaporation rate shows a higher decrease on patterned graphene oxide than that on homogeneous graphene oxide. The analysis shows an obvious decrease in the evaporation rate from unoxidized regions, which can be attributed to the increased amount of Na+ ions near the contact lines. The proximity of Na+ significantly extends the H-bond lifetime of the outermost water molecules, which reduces the number of water molecules diffusing from the oxidized to unoxidized regions. Moreover, the effect of the ions on water evaporation is less significant when the oxidation degree varies in a certain range. Our findings advance the understanding of the evaporation process in the presence of ions and highlight the potential application of graphene oxide in achieving controllable evaporation of liquids.


Evaporation Ions Graphene oxide Molecular dynamics simulation 



We thank Haiping Fang, Yi Gao, Beien Zhu, Xiaoling Lei, Jige Chen, Shanshan Liang, Xing Liu, Jingyu Qi, Gang Fang, Zhi Zhu, Yizhou Yang, Chonghai Qi, Yangchao Lu, Yangjie Wang, Xiaomeng Yu, Zhongjie Zhu, Xiaoyan Li, Huishu Ma, Jie Jiang, and Liuhua Mu for their constructive suggestions and help.

Supplementary material

41365_2019_646_MOESM1_ESM.docx (96 kb)
Supplementary material 1 (DOCX 97 kb)


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Copyright information

© China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghaiChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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