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Superhydrophobic-like tunable droplet bouncing on slippery liquid interfaces

Author

Listed:
  • Chonglei Hao

    (City University of Hong Kong)

  • Jing Li

    (City University of Hong Kong)

  • Yuan Liu

    (Chinese University of Hong Kong)

  • Xiaofeng Zhou

    (Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences)

  • Yahua Liu

    (City University of Hong Kong)

  • Rong Liu

    (City University of Hong Kong)

  • Lufeng Che

    (Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences)

  • Wenzhong Zhou

    (City University of Hong Kong)

  • Dong Sun

    (City University of Hong Kong)

  • Lawrence Li

    (City University of Hong Kong)

  • Lei Xu

    (Chinese University of Hong Kong)

  • Zuankai Wang

    (City University of Hong Kong
    Shenzhen Research Institute, City University of Hong Kong)

Abstract

Droplet impacting on solid or liquid interfaces is a ubiquitous phenomenon in nature. Although complete rebound of droplets is widely observed on superhydrophobic surfaces, the bouncing of droplets on liquid is usually vulnerable due to easy collapse of entrapped air pocket underneath the impinging droplet. Here, we report a superhydrophobic-like bouncing regime on thin liquid film, characterized by the contact time, the spreading dynamics, and the restitution coefficient independent of underlying liquid film. Through experimental exploration and theoretical analysis, we demonstrate that the manifestation of such a superhydrophobic-like bouncing necessitates an intricate interplay between the Weber number, the thickness and viscosity of liquid film. Such insights allow us to tune the droplet behaviours in a well-controlled fashion. We anticipate that the combination of superhydrophobic-like bouncing with inherent advantages of emerging slippery liquid interfaces will find a wide range of applications.

Suggested Citation

  • Chonglei Hao & Jing Li & Yuan Liu & Xiaofeng Zhou & Yahua Liu & Rong Liu & Lufeng Che & Wenzhong Zhou & Dong Sun & Lawrence Li & Lei Xu & Zuankai Wang, 2015. "Superhydrophobic-like tunable droplet bouncing on slippery liquid interfaces," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8986
    DOI: 10.1038/ncomms8986
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    Cited by:

    1. Yuhang Dai & Minfei Li & Bingqiang Ji & Xiong Wang & Siyan Yang & Peng Yu & Steven Wang & Chonglei Hao & Zuankai Wang, 2023. "Liquid metal droplets bouncing higher on thicker water layer," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Jiayue Tang & Yuanyuan Zhao & Mi Wang & Dianyu Wang & Xuan Yang & Ruiran Hao & Mingzhan Wang & Yanlei Wang & Hongyan He & John H. Xin & Shuang Zheng, 2022. "Circadian humidity fluctuation induced capillary flow for sustainable mobile energy," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Zhipeng Zhao & Huizeng Li & An Li & Wei Fang & Zheren Cai & Mingzhu Li & Xiqiao Feng & Yanlin Song, 2021. "Breaking the symmetry to suppress the Plateau–Rayleigh instability and optimize hydropower utilization," Nature Communications, Nature, vol. 12(1), pages 1-7, December.

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