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Slippery damper of an overlay for arresting and manipulating droplets on nonwetting surfaces

Author

Listed:
  • Xing Han

    (The University of Hong Kong
    The University of Hong Kong)

  • Wei Li

    (The University of Hong Kong
    The University of Hong Kong)

  • Haibo Zhao

    (The University of Hong Kong
    The University of Hong Kong
    Southern University of Science and Technology)

  • Jiaqian Li

    (The University of Hong Kong
    The University of Hong Kong)

  • Xin Tang

    (The University of Hong Kong
    The University of Hong Kong)

  • Liqiu Wang

    (The University of Hong Kong
    The University of Hong Kong)

Abstract

In diverse processes, such as fertilization, insecticides, and cooling, liquid delivery is compromised by the super-repellency of receiving surfaces, including super-hydro-/omni-phobic and superheated types, a consequence of intercalated air pockets or vapor cushions that promote droplet rebounds as floating mass-spring systems. By simply overlaying impacting droplets with a tiny amount of lubricant (less than 0.1 vol% of the droplet), their interfacial properties are modified in such a way that damper-roller support is attached to the mass-spring system. The overlayers suppress the out-of-plane rebounds by slowing the departing droplets through viscous dissipation and sustain the droplets’ in-plane mobility through self-lubrication, a preferential state for scenarios such as shedding of liquid in spray cooling and repositioning of droplets in printing. The footprint of our method can be made to be minimal, circumventing surface contamination and toxification. Our method enables multifunctional and dynamic control of droplets that impact different types of nonwetting surfaces.

Suggested Citation

  • Xing Han & Wei Li & Haibo Zhao & Jiaqian Li & Xin Tang & Liqiu Wang, 2021. "Slippery damper of an overlay for arresting and manipulating droplets on nonwetting surfaces," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23511-3
    DOI: 10.1038/s41467-021-23511-3
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    Cited by:

    1. Ying Zhou & Chenguang Zhang & Wenchang Zhao & Shiyu Wang & Pingan Zhu, 2023. "Suppression of hollow droplet rebound on super-repellent surfaces," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. 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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